---
name: "mpdcheck"
section: "1"
platform: "linux"
package: "mpich2"
version: "1.2.1.1-5"
release: "Debian 6.0 (Squeeze)"
platforms: ["linux"]
url: "https://new.carta.tech/mpdcheck"
---

# mpdcheck(1)

mpdcheck

## NAME

**mpdcheck** - mpdcheck

## FILE

**/Users/goodell/svn/mpich2-1.2.1p1-tmp/src/pm/mpd/mpdcheck.py**

## DESCRIPTION

**This script is a work in progress and may change frequently as we work** **with users and gain additional insights into how to improve it.**

**This script prints useful information about the host on which it runs.** **It is here to help us help users detect problems with configurations of**

- **their computers.**

  **For example, some computers are configured to think** **of themselves simply as 'localhost' with 127.0.0.1 as the IP address.** **This might present problems if a process on that computer wishes to** **identify itself by host and port to a process on another computer.** **The process on the other computer would try to contact 'localhost'.**

**If you are having problems running parallel jobs via mpd on one or more** **hosts, you might try running this script once on each of those hosts.**

**Any output with \*\*\* at the beginning indicates a potential problem** **that you may have to resolve before being able to run parallel jobs** **via mpd.**

**For help:** **mpdcheck -h (or --help)** **prints this message**

**In the following modes, the -v (verbose) option provides info about what** **mpdcheck is doing; the -l (long messages) option causes long informational** **messages to print in situations where problems are spotted.**

**The three major modes of operation for this program are:**

```
        mpdcheck
            looks for config problems on 'this' host; prints as nec
        mpdcheck -pc
            print config info about 'this' host, e.g. contents of /etc/hosts, etc.
        mpdcheck -f some_file [-ssh]
            prints info about 'this' host and locatability info about the ones
            listed in some_file as well (note the file might be mpd.hosts);
            the -ssh option can be used in conjunction with the -f option to
            cause ssh tests to be run to each remote host
        mpdcheck -s
            runs this program as a server on one host
        mpdcheck -c server_host server_port
            runs a client on another (or same) host; connects to the specifed
            host/port where you previously started the server
```

## FUNCTIONS

**ctime(...)** **ctime(seconds) -\> string**

**Convert a time in seconds since the Epoch to a string in local time.** **This is equivalent to asctime(localtime(seconds)). When the time tuple is** **not present, current time as returned by localtime() is used.**

**exit(...)** **exit(\[status\])**

**Exit the interpreter by raising SystemExit(status).** **If the status is omitted or None, it defaults to zero (i.e., success).** **If the status is numeric, it will be used as the system exit status.** **If it is another kind of object, it will be printed and the system** **exit status will be one (i.e., failure).**

**gethostbyaddr(...)** **gethostbyaddr(host) -\> (name, aliaslist, addresslist)**

**Return the true host name, a list of aliases, and a list of IP addresses,**

- **for a host.**

  **The host argument is a string giving a host name or IP number.**

**gethostbyname\_ex(...)** **gethostbyname\_ex(host) -\> (name, aliaslist, addresslist)**

**Return the true host name, a list of aliases, and a list of IP addresses,**

- **for a host.**

  **The host argument is a string giving a host name or IP number.**

**gethostname(...)** **gethostname() -\> string**

**Return the current host name.**

**kill(...)** **kill(pid, sig)**

**Kill a process with a signal.**

**select(...)** **select(rlist, wlist, xlist\[, timeout\]) -\> (rlist, wlist, xlist)**

**Wait until one or more file descriptors are ready for some kind of I/O.** **The first three arguments are sequences of file descriptors to be waited for:** **rlist -- wait until ready for reading** **wlist -- wait until ready for writing** **xlist -- wait for an \`\`exceptional condition''** **If only one kind of condition is required, pass \[\] for the other lists.** **A file descriptor is either a socket or file object, or a small integer** **gotten from a fileno() method call on one of those.**

**The optional 4th argument specifies a timeout in seconds; it may be**

- **a floating point number to specify fractions of seconds.**

  **If it is absent** **or None, the call will never time out.**

**The return value is a tuple of three lists corresponding to the first three** **arguments; each contains the subset of the corresponding file descriptors** **that are ready.**

**\*\*\* IMPORTANT NOTICE \*\*\*** **On Windows and OpenVMS, only sockets are supported; on Unix, all file descriptors.**

**system(...)** **system(command) -\> exit\_status**

**Execute the command (a string) in a subshell.**

## DATA

**SIGKILL = 9** **\_\_author\_\_ = 'Ralph Butler and Rusty Lusk'** **\_\_credits\_\_ = ''** **\_\_date\_\_ = 'Mon Feb 22 16:28:13 2010'** **\_\_version\_\_ = '$Revision: 1.19 $'** **argv = \['/usr/bin/pydoc', 'mpdcheck'\]** **stdout = \<open file '\<stdout\>', mode 'w' at 0x17068\>**

## VERSION

**1.19**

## DATE

**Mon Feb 22 16:28:13 2010**

## AUTHOR

**Ralph Butler and Rusty Lusk**

## CREDITS