--- name: "conserver.cf" section: "5" platform: "linux" package: "conserver-server" version: "8.2.7-3" release: "Debian 13 (Trixie)" platforms: ["linux"] url: "https://new.carta.tech/conserver.cf" --- # conserver.cf(5) console configuration file for conserver(8) ## NAME conserver.cf - console configuration file for [**conserver**(8)](/conserver/8.md) ## DESCRIPTION The format of the conserver.cf file is made up of named blocks of keyword/value pairs, comments, and optional whitespace for formatting flexibility. The block types as well as the keywords are pre-defined and explained in the **BLOCKS** section. A comment is an unquoted pound-sign to a newline. See the **PARSER** section for full details on whitespace and quoting. Let me first show you a sample block with a couple of keyword/value pairs to make the description a bit simpler to understand. - ``` console simple { master localhost; type exec; rw *; } ``` This is actually a fully functional conserver.cf file (if certain conditions are met...and if you can list those conditions, you can probably can skip to the **BLOCKS** section). Our example is made of up of a console-block named \`\`simple'' with three keyword/value pairs. What this does is define a console named \`\`simple'', makes the master of that console the host \`\`localhost'', makes the type an exec-style console, and gives every user read/write permission. This is the generic format of the file: - ``` block-type block-name { keyword value; ... } ``` To show the addition of comments and whitespace, here is the example reformatted (but functionally equivalent): - ``` # define a console named "simple" console simple { # setting all required values... master localhost; type exec; # exec-style console rw *; # allow any username } ``` ## PARSER The parser has six characters that it considers special. These are: \`\`{'', \`\`}'', \`\`;'', \`\`#'', \`\`\\'', and \`\`"''. The first three (hereby called tokens) define the format of the configuration blocks and are used as word separators, the next is the comment character, and the last two are quoting characters. Word separation occurs when the parser encounters an unquoted token and, in certain cases, whitespace. Whitespace is only used as a word separator when the parser is looking for a block-type or keyword. When it's looking for a block-name or value, whitespace is like any other character, which allows you to embed whitespace in a block-name or value without having to quote it. Here is an example: - ``` default my defs { rw *; include other defs ; } ``` The block-type is \`\`default'', the block-name is \`\`my defs'', and the value for the keyword \`\`include'' is \`\`other defs''. Whitespace around tokens are ignored so you get \`\`other defs'' instead of \`\`other defs '' as the value. The only way to use one of the special characters as part of a block-name or value is to quote it. Quoting is a simple matter of prefixing a character with a backslash or surrounding a group of characters with double-quotes. If a character is prefixed by a backslash, the next character is a literal (so \`\`\\\\'' produces a \`\`\\'', \`\`\\"'' produces \`\`"'', \`\`\\{'' produces a \`\`{'', etc.). For double-quoted strings, all characters are literal except for \`\`\\"'', which embeds a double-quote. Adding a variety of quotes to our example without changing the meaning of things, we have: - ``` "defa"ult my\ defs { rw *; in\clude "other defs" ; } ``` There is one special line the parser recognizes: a \`\`#include'' statement. It is of the form: - **#include** *filename* Any whitespace around *filename* is ignored, but whitespace embedded inside is preserved. Everything in *filename* is taken literally, so none of the normal parser quoting applies. The **#include** must begin in \`\`column 0'' - no whitespace is allowed between it and the start of the physical line. There is an include file depth limit of 10 to prevent infinite recursion. ## BLOCKS - **access** *hostname*\|*ipaddr* Define an access block for the host named *hostname* or using the address *ipaddr*. If the value of \`\`\*'' is used, the access block will be applied to all conserver hosts. Access lists are used in a first match fashion (top down), so order is important. - **admin** \[**!**\]*username*\[**,**...\]\|**""** Define a list of users making up the admin list for the console server. If *username* matches a previously defined group name, all members of the previous group are applied to the admin list (with access reversed if prefixed with a \`!'). If *username* doesn't match a previously defined group and *username* begins with \`@', the name (minus the \`@') is checked against the host's group database. All users found in the group will be granted (or denied, if prefixed with \`!') access. If *username* doesn't match a previous group and doesn't begin with \`@', the users will be granted (or denied, if prefixed with \`!') access. If the null string (\`\`**""**'') is used, any users previously defined for the console servers's admin list are removed. - **allowed** *hostname*\[**,**...\] The list of hostnames are added to the \`\`allowed'' list, which grants connections from the hosts but requires username authentication. - **include** *accessgroup* The access lists defined using the name *accessgroup* are applied to the current access block. The included access block must be previously defined. - **limited** \[**!**\]*username*\[**,**...\]\|**""** Define a list of users with limited functionality on the console server. These users will not be allowed to suspend their connection, shift to another console, or attach to a local command. If *username* matches a previously defined group name, all members of the previous group are applied to the admin list (with access reversed if prefixed with a \`!'). If *username* doesn't match a previously defined group and *username* begins with \`@', the name (minus the \`@') is checked against the host's group database. All users found in the group will be granted (or denied, if prefixed with \`!') access. If *username* doesn't match a previous group and doesn't begin with \`@', the users will be granted (or denied, if prefixed with \`!') access. If the null string (\`\`**""**'') is used, any users previously defined for the console server's limited list are removed. - **rejected** *hostname*\[**,**...\] The list of hostnames are added to the \`\`rejected'' list, which rejects connections from the hosts. - **trusted** *hostname*\[**,**...\] The list of hostnames are added to the \`\`trusted'' list, which grants connections from the hosts without username authentication. - **break** *n* Define a break sequence where (1 \<= *n* \<= 9) or (a \<= *n* \<= z). Break sequences are accessed via the \`\`^Ecl*n*'' client escape sequence. - **confirm** **yes**\|**true**\|**on**\|**no**\|**false**\|**off** Set whether or not to ask the client for confirmation before sending the break sequence. The default is \`\`no''. - **delay** *n* Set the time delay for the **\\d** sequence to *n* milliseconds. The default time delay is 250ms. - **string** *breakseq* Assign the string *breakseq* to the specified slot *n*. A break sequence is a simple character string with the exception of \`\\' and \`^': - **\\a** alert - **\\b** backspace - **\\d** delay specified by the **delay** option. - **\\f** form-feed - **\\n** newline - **\\r** carriage-return - **\\t** tab - **\\v** vertical-tab - **\\z** serial break - **\\\\** backslash - **\\^** circumflex - **\\***ooo* octal representation of a character (where *ooo* is one to three octal digits) - **\\***c* character *c* - **^?** delete - **^***c* control character (*c* is \`\`and''ed with 0x1f) - **config** *hostname*\|*ipaddr* Define a configuration block for the host named *hostname* or using the address *ipaddr*. If the value of \`\`\*'' is used, the configuration block will be applied to all conserver hosts. - **autocomplete** **yes**\|**true**\|**on**\|**no**\|**false**\|**off** Turn the console name autocompletion feature on or off. If autocompletion is on, a client can use any unique leading portion of a console name when connecting to a console. Autocompletion is on by default. - **defaultaccess** **rejected**\|**trusted**\|**allowed** Set the default access permission for all hosts not matched by an access list (see the **-a** command-line flag). - **daemonmode** **yes**\|**true**\|**on**\|**no**\|**false**\|**off** Set whether or not to become a daemon when run (see the **-d** command-line flag). - **initdelay** *number* Set the number of seconds between console initializations. All consoles with the same **host** value will be throttled as a group (those without a **host** value are their own group). In other words, each console within a group will only be initialized after *number* seconds passes from the previous initialization of a console in that group. Different throttle groups are initialized simultaneously. One warning: since consoles are split up and managed by seperate conserver processes, it's possible for more than one conserver process to have a throttle group based on a particular **host** value. If this happens, each conserver process will throttle their groups independently of the other conserver processes, which results in a more rapid initialization (per **host** value) than one might otherwise expect. If *number* is zero, all consoles are initialized without delay. - **logfile** *filename* Set the logfile to write to when in daemon mode (see the **-L** command-line flag). - **passwdfile** *filename* Set the password file location used for authentication (see the **-P** command-line flag). - **primaryport** *number*\|*name* Set the port used by the master conserver process (see the **-p** command-line flag). - **redirect** **yes**\|**true**\|**on**\|**no**\|**false**\|**off** Turn redirection on or off (see the **-R** command-line flag). - **reinitcheck** *number* Set the number of minutes used between reinitialization checks (see the **-O** command-line flag). - **secondaryport** *number*\|*name* Set the base port number used by child processes (see the **-b** command-line flag). - **setproctitle** **yes**\|**true**\|**on**\|**no**\|**false**\|**off** Set whether or not the process title shows master/group functionality as well as the port number the process is listening on and how many consoles it is managing. The operating system must support the **setproctitle**() call. - **sslcredentials** *filename* Set the SSL credentials file location (see the **-c** command-line flag). - **sslcacertificatefile** *filename* Load the valid CA certificates for the SSL connection from the PEM encoded file. This option overrides the global CA list. - **sslreqclientcert** **yes**\|**true**\|**on**\|**no**\|**false**\|**off** Set whether or not a certificate is required by the client to connect. The default is \`\`no''. - **sslrequired** **yes**\|**true**\|**on**\|**no**\|**false**\|**off** Set whether or not encryption is required when talking to clients (see the **-E** command-line flag). - **unifiedlog** *filename* Set the location of the unified log to *filename*. See the **-U** command-line flag for details. - **console** *name* Define a console identified as *name*. The keywords are the same as the **default** block with the following addition. - **aliases** *name*\[**,**...\]\|**""** Define a list of console aliases. If the null string (\`\`**""**'') is used, any aliases previously defined for the console are removed. - **default** *name* Define a block of defaults identified as *name*. If *name* is \`\`\*'', the automatically applied default block is defined (basically all consoles have an implicit \`\`include "\*";'' at the beginning of their definition). - **baud** **300**\|**600**\|**1800**\|**2400**\|**4800**\|**9600**\|**19200**\|**38400**\|**57600**\|**115200**\|..\|**4000000** Assign the baud rate to the console. Only consoles of type \`\`device'' will use this value. - **break** *n* Assign the break sequence *n* as the default for the console, which is used by the \`\`^Ecl0'' client escape sequence. - **breaklist** *n*\[**,**...\]\|**""** Associate a list of break sequences referenced by *n* with the console. If \`\`\*'' is used (the default), all defined break sequences will be available. If the null string (\`\`**""**'') is used, no sequences will be available. - **device** *filename* Assign the serial device *filename* as the path to the console. Only consoles of type \`\`device'' will use this value. - **devicesubst** *c***=***t*\[*n*\]*f*\[**,**...\]\|**""** Perform character substitutions on the **device** value. A series of replacements can be defined by specifying a comma-separated list of *c*=*t*\[*n*\]*f* sequences where *c* is any printable character, *t* specifies the replacement value, *n* is a field length (optional), and *f* is the format string. *t* can be one of the characters below, catagorized as a string replacement or a numeric replacement, which dictates the use of the *n* and *f* fields. - String Replacement - **c** console name - **h** **host** value - **r** **replstring** value Numeric Replacement - **b** **baud** value - **p** config **port** value - **P** calculated port value - For string replacements, if the replacement isn't at least *n* characters, it will be padded with space characters on the left. *f* must be \`s'. For numeric replacements, the value will be formatted to at least *n* characters, padded with 0s if *n* begins with a 0, and space characters otherwise. *f* must be either \`d', \`x', \`X', \`a', or \`A', specifying a decimal, lowercase hexadecimal (0-9a-f), uppercase hexadecimal (0-9A-F), lowercase alphanumeric (0-9a-z), or uppercase alphanumeric (0-9A-Z) conversion. If the null string (\`\`**""**'') is used, no replacements will be done. - **exec** *command\|***""** *Assign the string* *command* *as the command to access the console.* *Conserver will run the command by* *invoking \`\`/bin/sh -ce "command"''.* *If the null string (\`\`***""***'') is used or no* **exec** *keyword is specified, conserver will use the command \`\`/bin/sh -i''.* *Only consoles of type \`\`exec'' will use this value.* - **execrunas** *\[user\]\[:group\]\|***""** *By default, the command invoked by* **exec** *is run with the same privileges as the server.* *If the server is running with root privileges, this option resets the user* *and/or group of the invoked process to* *user* *and* *group* *respectively.* *user* *may be a username or numeric uid and* *group* *may be a group name or numeric gid.* *Either one is optional.* *If the server is not running with root privileges, these values* *are not used.* *If the null string (\`\`***""***'') is specified, the default of running* *with the same privileges as the server is restored.* - **execsubst** *c***=***t\[n\]f\[***,***...\]\|***""** *Perform character substitutions on the* **exec** *value.* *See the* **devicesubst** *option for an explanation of the format string.* *If the null string (\`\`***""***'') is used, no replacements will be done.* - **host** *hostname* *Assign* *hostname* *as the host to connect to for accessing the console.* *You must also set the* **port** *option for consoles of type \`\`host''.* *Normally, only consoles of type \`\`host'' and \`\`ipmi'' will use this value,* *however if the* **devicesubst**, **execsubst**, *or* **initsubst** *keywords are used in any console type, this value is used.* - **idlestring** *string\|***""** *Assign the* *string* *that is sent to the console once the console is idle for an* *idletimeout* *amount of time.* *If the null string (\`\`***""***'') is used, the string is unset and* *the default is used.* *The string is interpreted just as a* **break** *string is interpreted (see the* **break** *configuration items for details) where all delays specified (via \`\`\\d'')* *use the default delay time.* *The default string is \`\`\\n''.* - **idletimeout** *number\[***s***\|***m***\|***h***\]* *Set the idle timeout of the console to* *number* *seconds.* *If an \`s', \`m', or \`h' is used after* *number*, *the specified time is interpreted as seconds, minutes, or hours.* *Set the timeout to zero to disable the idle timeout (the default).* - **ipmiciphersuite** *number* *Set the IPMI cipher suite. Syntactically valid* *values are -1 (the default) and greater. Check the FreeIPMI documentation* *for usable values.* - **ipmikg** *string\|***""** *Set the BMC authentication key K\_g to* *string*. *A K\_g value is a simple character string with the exception of \`\\':* - **\\\\** *backslash* - **\\***ooo* *octal representation of a character (where* *ooo* *is one to three octal digits)* - **\\***c* *character* *c* - *The resulting value must be no more than 20 characters.* *The null string (\`\`***""***'') is the default.* - **ipmiworkaround** *\[***!***\]option\[***,***...\]\|***""** *You can turn off a workaround by prefixing it with a* \`\`**!**'' *character.* *So, to turn off the* **integrity** *workaround, you would use* **!integrity**. *The following are valid* *option*s *and their mapping to FreeIPMI settings:* - **activation-status** SKIP\_SOL\_ACTIVATION\_STATUS - **auth-capabilites** AUTHENTICATION\_CAPABILITIES - **channel-payload** SKIP\_CHANNEL\_PAYLOAD\_SUPPORT - **checksum** NO\_CHECKSUM\_CHECK - **default** DEFAULT - **ignore-payload-size** IGNORE\_SOL\_PAYLOAD\_SIZE - **ignore-port** IGNORE\_SOL\_PORT - **integrity** NON\_EMPTY\_INTEGRITY\_CHECK\_VALUE - **intel-session** INTEL\_2\_0\_SESSION - **packet-sequence** INCREMENT\_SOL\_PACKET\_SEQUENCE - **privilege** OPEN\_SESSION\_PRIVILEGE - **serial-alerts** SERIAL\_ALERTS\_DEFERRED - **sun-session** SUN\_2\_0\_SESSION - **supermicro-session** SUPERMICRO\_2\_0\_SESSION - *If no* **ipmiworkaround** *is specified, the \`\`***default***'' workaround will be used.* *The null string (\`\`***""***'') unsets all workarounds,* *including \`\`***default***''.* *See the FreeIPMI documentation for details on what workarounds affect.* - **ipmiprivlevel** *user\|operator\|admin* *Set the privilege level for the username used during IPMI authentication.* *The default privilege level is \`\`admin''.* - **include** *default* *The default block defined using the name* *default* *is applied to the current console or default block.* *The included default block must be previously defined.* - **initcmd** *command\|***""** *Invoke* *command* *as soon as the console is brought up, redirecting the console* *to stdin, stdout, and stderr of* *command*. *The* *command* *is passed as an argument to \`\`/bin/sh -ce''.* *If the null string (\`\`***""***'') is used, the command is unset and* *nothing is invoked.* - **initrunas** *\[user\]\[:group\]\|***""** *By default, the command invoked by* **initcmd** *is run with the same privileges as the server.* *If the server is running with root privileges, this option resets the user* *and/or group of the invoked process to* *user* *and* *group* *respectively.* *user* *may be a username or numeric uid and* *group* *may be a group name or numeric gid.* *Either one is optional.* *If the server is not running with root privileges, these values* *are not used.* *If the null string (\`\`***""***'') is specified, the default of running* *with the same privileges as the server is restored.* - **initspinmax** *n\|***""** *Set the maximum number of \`\`spins'' allowed for the console to* *n*, *where 0 \<=* *n* *\<= 254.* *A console is determined to be \`\`spinning'' if an attempt to initialize* *the console occurs in under* **initspintimer** *seconds from its previous initialization and this quick* *initialization occurs* **initspinmax** *times in a row.* *If, at any point, the time between initializations is greater than* **initspintimer**, *the counter for reaching* **initspinmax** *resets to zero.* *When a console is determined to be \`\`spinning'' it is forced down.* *If the null string (\`\`***""***'') is specified, the default of* **5** *is used.* - **initspintimer** *t\|***""** *Set the number of seconds a console must be \`\`up'' to not be* *considered \`\`spinning'' to* *t*, *where 0 \<=* *t* *\<= 254.* *See* **initspinmax** *for a full description of console \`\`spinning.''* *If the null string (\`\`***""***'') is specified, the default of* **1** *is used.* - **initsubst** *c***=***t\[n\]f\[***,***...\]\|***""** *Perform character substitutions on the* **initcmd** *value.* *See the* **devicesubst** *option for an explanation of the format string.* *If the null string (\`\`***""***'') is used, no replacements will be done.* - **logfile** *filename\|***""** *Assign the logfile specified by* *filename* *to the console.* *Any occurrence of \`\`&'' in* *filename* *will be replaced with the name of the console.* *If the null string (\`\`***""***'') is used, the logfile name is unset and* *no logging will occur.* - **logfilemax** *number\[***k***\|***m***\]* *Enable automatic rotation of* **logfile** *once its size exceeds* *number* *bytes.* *Specifying* **k** *or* **m** *interpret* *number* *as kilobytes and megabytes.* *number* *must be at least 2048 bytes.* *A value of zero will turn off automatic rotation of* **logfile**. *The* **logfile** *filename* *will be renamed* *filename*-YYYYMMDD-HHMMSS, *where the extension is the current GMT year, month, day, hour,* *minute, and second (to prevent issues with clock rollbacks).* *File sizes are checked every 5 minutes with an additional initial* *pseudo-random delay of up to one minute (to help prevent all processes* *checking all consoles simultaneously).* *2.5% (minimum 100 bytes, maximum 4000 bytes) of the old* *logfile is read from the end of the file.* *All data past the first newline is moved (not copied) to the new logfile* *so that a replay of the console works and starts on a line boundary.* - **master** *hostname\|ipaddr* *Define which conserver host manages the console.* *The host may be specified by* *hostname* *or using the address* *ipaddr*. - **motd** *message\|***""** *Set the "message of the day" for the console to* *message*, *which gets displayed when a client attaches to the console.* *If the null string (\`\`***""***'') is used, the MOTD is unset and* *no message will occur.* - **options** *\[***!***\]option\[***,***...\]\|***""** *You can negate the option by prefixing it with a* \`\`**!**'' *character.* *So, to turn off the* **hupcl** *flag, you would use* **!hupcl**. *The following are valid* *option*s: - **ixon** *Enable* XON/XOFF *flow control on output.* *Only consoles of type \`\`device'' or \`\`exec'' will use this value.* *Default is* **ixon**. - **ixany** *Enable any character to restart output.* *Only consoles of type \`\`device'' or \`\`exec'' will use this value.* *Default is* **!ixany**. - **ixoff** *Enable* XON/XOFF *flow control on input.* *Only consoles of type \`\`device'' or \`\`exec'' will use this value.* *Default is* **ixoff** *for consoles of type \`\`device'' and* **!ixoff** *for consoles of type \`\`exec''.* - **crtscts** *Enable* RTS/CTS *(hardware) flow control.* *Only consoles of type \`\`device'' will use this value.* *Default is* **!crtscts**. - **cstopb** *Set two stop bits, rather than one.* *Only consoles of type \`\`device'' will use this value.* *Default is* **!cstopb**. - **hupcl** *Lower modem control lines after last process closes the device (hang up).* *Only consoles of type \`\`device'' will use this value.* *Default is* **!hupcl**. - **ondemand** *Initialize the console when a client requests a connection to the console.* *When no clients are connected, bring the console down.* *The conserver option* **-i** *will set this flag for all consoles.* *Default is* **!ondemand**. - **striphigh** *Strip the high bit off all data coming from this console and all clients* *connected to this console before processing occurs.* *The conserver option* **-7** *will set this flag for all consoles.* *Default is* **!striphigh**. - **reinitoncc** *Automatically reinitialize (\`\`bring up'') a downed console when a client* *connects.* *Without this option, a client will be attached to the downed console* *and will need to manually reinitialize the console with an escape sequence.* *The conserver option* **-o** *will set this flag for all consoles.* *Default is* **!reinitoncc**. - **autoreinit** *Allow this console to be automatically reinitialized if it unexpectedly* *goes down.* *If the console doesn't come back up, it is retried every minute.* *A console of type \`\`exec'' that exits with a zero exit status is* *automatically reinitialized regardless of this setting.* *The conserver option* **-F** *will* **unset** *this flag for all consoles.* *Default is* **autoreinit**. - **unloved** *Enable the sending of this console's output (prefixed with its* *name) to the daemon's stdout (or the logfile if in daemon mode) when no* *clients are connected to the console.* *The conserver option* **-u** *will set this flag for all consoles.* *Default is* **!unloved**. - **login** *Allow users to log into this console.* *If logins are not allowed, conserver will send a generic message to the* *client saying so and terminate the connection.* *You can override the generic message by setting the* **motd** *message.* *Default is* **login**. - **parity** **even***\|***mark***\|***none***\|***odd***\|***space** *Set the parity option for the console.* *Only consoles of type \`\`device'' will use this value.* - **password** *password\|***""** *Use* *password* *during IPMI authentication.* *If the null string (\`\`***""***'') is used (the default), no password will be used.* - **port** *number\|name* *Set the port used to access the console.* *The port may be specified as a* *number* *or a* *name*. *A* *name* *will cause a* [**getservbyname**(3)](/getservbyname/3.md) *call to look up the port number.* *The* **port**, **portbase**, *and* **portinc** *values are all used to calculate the final port number to connect to.* *The formula used is* *finalport* = **portbase** + **portinc** \* **port**. *By using proper values in the formula, you can reference ports on a* *terminal server by their physical numbering of* 0..*n* *or* 1..*n* *(depending on if you like zero-based or one-based numbering).* *Warning: you can generate a -1 value with this formula,* *which will become a very high numbered positive* *value (since things are stored unsigned).* *You must also set the* **host** *option as well.* *Normally, only consoles of type \`\`host'' will use this value, however* *if the* **devicesubst**, **execsubst**, *or* **initsubst** *keywords are used in any console type, this value is used.* - **portbase** *number* *Set the base value for the port calculation formula.* *number* *must be 0 or greater.* *The default is zero.* *See* **port** *for the details of the formula.* - **portinc** *number* *Set the increment value for the port calculation formula.* *number* *must be 0 or greater.* *The default is one.* *See* **port** *for the details of the formula.* - **protocol** **telnet***\|***raw** *Set the protocol used to send and receive data from the console.* *If* **raw** *is used, all data is sent \`\`as is'', unprotected by any protocol specification.* *If* **telnet** *is used (which is the default), data is encapsulated in the telnet protocol.* *The* **striphigh** *console option still applies when data is read by the server, and if enabled,* *can impact the encapsulation process.* - **replstring** *string* *A generic replacement string that can be used by the* **devicesubst**, **execsubst**, *and* **initsubst** *keywords.* - **ro** *\[***!***\]username\[***,***...\]\|***""** *Define a list of users making up the read-only access list* *for the console.* *If* *username* *matches a previously defined group name, all members of the previous* *group are applied to the read-only access list (with access reversed* *if prefixed with a \`!').* *If* *username* *doesn't match a previously defined group and* *username* *begins with \`@', the name (minus the \`@') is checked against the* *host's group database.* *All users found in the group will be granted (or denied, if prefixed* *with \`!') read-only access.* *If* *username* *doesn't match a previous group and doesn't begin with \`@', the users* *will be granted (or denied, if prefixed with \`!') read-only access.* *If the null string (\`\`***""***'') is used, any* *users previously defined for the console's read-only list are removed.* - **rw** *\[***!***\]username\[***,***...\]\|***""** *Define a list of users making up the read-write access list* *for the console.* *If* *username* *matches a previously defined group name, all members of the previous* *group are applied to the read-write access list (with access reversed* *if prefixed with a \`!').* *If* *username* *doesn't match a previously defined group and* *username* *begins with \`@', the name (minus the \`@') is checked against the* *host's group database.* *All users found in the group will be granted (or denied, if prefixed* *with \`!') read-write access.* *If* *username* *doesn't match a previous group and doesn't begin with \`@', the users* *will be granted (or denied, if prefixed with \`!') read-write access.* *If the null string (\`\`***""***'') is used, any* *users previously defined for the console's read-write list are removed.* - **tasklist** *c\[***,***...\]\|***""** *Associate a list of tasks referenced by* *c* *with the console.* *If \`\`\*'' is used (the default), all defined tasks will be available.* *If the null string (\`\`***""***'') is used, no tasks will be available.* - **timestamp** *\[number\[***m***\|***h***\|***d***\|***l***\]\]\[***a***\]\[***b***\]\|***""** *Specifies the time between timestamps applied to the console* *log file and whether to log read/write connection actions.* *The timestamps look like \`\`\[-- MARK -- Mon Jan 25 14:46:56 1999\]''.* *The* \`**m**', \`**h**', *and* \`**d**' *tags specify \`\`minutes'' (the default), \`\`hours'', and \`\`days''.* *The* \`**l**' *tag specifies \`\`lines'' and will cause timestamps of the* *form \`\`\[Mon Jan 25 14:46:56 PST 1999\]'' to* *be placed every* *number* *lines (a newline character signifies a new line).* *So, \`\`5h'' specifies every five hours and \`\`2l'' specifies every* *two lines.* *An* \`**a**' *can be specified to add logs of \`\`attached'', \`\`detached'',* *and \`\`bumped'' actions, including the user's name and the host from which the* *client connection was made.* *A* \`**b**' *can be specified to add logging of break sequences sent to the console.* - **type** **device***\|***ipmi***\|***exec***\|***host***\|***noop***\|***uds** *Set the type of console.* *A type of* \`\`**device**'' *should be used for local serial ports (also set the* **device** *value).* *A type of* \`\`**ipmi**'' *should be used for IPMI serial over LAN consoles (also set the* **host** *value and possibly the* **username**, **password**, *and* **ipmi**\* *values).* *A type of* \`\`**exec**'' *should be used for command invocations (perhaps also set the* **exec** *value).* *A type of* \`\`**host**'' *should be used for terminal servers and other TCP socket-based* *interaction (also set the* **host** *and* **port** *values).* *A type of* \`\`**noop**'' *should be used as a placeholder - it does nothing, ignores any* **logfile** *value and forces the* **!nologin** *option (so you might want to set the* **motd** *value).* *A type of* \`\`**uds**'' *should be used for Unix domain sockets (also set the* **uds** *option).* - **uds** *filename* *Assign the Unix domain socket* *filename* *as the path to the console.* *Only consoles of type \`\`uds'' will use this value.* - **udssubst** *c***=***t\[n\]f\[***,***...\]\|***""** *Perform character substitutions on the* **uds** *value.* *See the* **devicesubst** *option for an explanation of the format string.* *If the null string (\`\`***""***'') is used, no replacements will be done.* - **username** *username\|***""** *Use* *username* *during IPMI authentication.* *If the null string (\`\`***""***'') is used (the default), the \`\`null'' user will be used.* - **group** *name* *Define a user group identified as* *name*. - **users** *\[***!***\]username\[***,***...\]\|***""** *Define a list of users making up the group* *name*. *If* *username* *matches a previously defined group name, all members of the previous* *group are applied to the current group (with access reversed* *if prefixed with a \`!').* *If* *username* *doesn't match a previously defined group and* *username* *begins with \`@', the name (minus the \`@') is checked against the* *host's group database.* *All users found in the group will be recorded with (or without, if prefixed* *with \`!') access.* *If* *username* *doesn't match a previous group and doesn't begin with \`@', the users* *will be recorded with (or without, if prefixed with \`!') access.* *If the null string (\`\`***""***'') is used, any* *users previously defined for this group are removed.* - **task** *c* *Define a task where* *c* *is a lowercase alphanumeric (0-9a-z).* *Tasks are invoked via the* \`\`^Ec!*c*'' *client escape sequence.* - **cmd** *command\|***""** *Invoke* *command* *on the server when instructed by the client.* *All file descriptors are closed, except for stderr (which is inherited from* *the server).* *The* *command* *is passed as an argument to \`\`/bin/sh -ce'' and is a \`\`fire and forget''* *methodology (you need to check logs for any issues).* *If the null string (\`\`***""***'') is used, the entire task definition is ignored.* - **confirm** **yes***\|***true***\|***on***\|***no***\|***false***\|***off** *Set whether or not to ask the client for confirmation before invoking the task.* *The default is \`\`no''.* - **description** *string* *Set a description for the task. When a client lists tasks,* *string* *will be printed instead of the command defined above.* *If the null string (\`\`***""***'') is used, the command defined above will* *be printed.* - **runas** *\[user\]\[:group\]\|***""** *By default, the command invoked by* **cmd** *is run with the same privileges as the server.* *If the server is running with root privileges, this option resets the user* *and/or group of the invoked process to* *user* *and* *group* *respectively.* *user* *may be a username or numeric uid and* *group* *may be a group name or numeric gid.* *Either one is optional.* *If the server is not running with root privileges, these values* *are not used.* *If the null string (\`\`***""***'') is specified, the default of running* *with the same privileges as the server is restored.* - **subst** *c***=***t\[n\]f\[***,***...\]\|***""** *Perform character substitutions on the* **cmd** *value.* *See the* **devicesubst** *option for an explanation of the format string.* *If the null string (\`\`***""***'') is used, no replacements will be done.* ## AUTHORS *Bryan Stansell, conserver.com* ## SEE ALSO [**console**(1)](/console/1.md), [**conserver.passwd**(5)](/conserver.passwd/5.md), [**conserver**(8)](/conserver/8.md)