---
name: "bos_removehost"
section: "8"
platform: "linux"
package: "openafs-client"
version: "1.8.13.2-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/bos_removehost"
---

# bos\_removehost(8)

Removes a database server machine from the CellServDB file

## NAME

bos\_removehost - Removes a database server machine from the CellServDB file

## SYNOPSIS

**bos removehost** **-server** \<*machine name*\> **-host** \<*host name*\>+\
     \[**-cell** \<*cell name*\>\] \[**-noauth**\] \[**-localauth**\] \[**-help**\]

**bos removeh** **-s** \<*machine name*\> **-ho** \<*host name*\>+\
     \[**-c** \<*cell name*\>\] \[**-n**\] \[**-l**\] \[**-he**\]

## DESCRIPTION

The **bos removehost** command removes the entry for each database server machine specified with the **-host** argument from the */etc/openafs/server/CellServDB* file on the server machine named by the **-server** argument.

## CAUTIONS

After executing this command (and waiting for the Update Server to propagate the changes, if it is used), restart the database server processes on all database server machines to force election of a quorum that includes the new set of machines listed in the */etc/openafs/server/CellServDB* file. The *OpenAFS Quick Start Guide* explains in more detail how to add and remove database server machines.

## OPTIONS

- **-server** \<*machine name*\>

  Indicates the server machine on which to change the */etc/openafs/server/CellServDB* file. Identify the machine by IP address or its host name (either fully-qualified or abbreviated unambiguously). For details, see [**bos**(8)](/bos/8.md).

  In cells that use the Update Server to distribute the contents of the */etc/openafs/server* directory, it is conventional to specify only the system control machine as a value for the **-server** argument. Otherwise, repeat the command for each file server machine. For further discussion, see [**bos**(8)](/bos/8.md).

- **-host** \<*host name*\>+

  Specifies the fully-qualified host name (such as `"fs2.example.com"`) of each database server machine to remove from the **CellServDB** file.

- **-cell** \<*cell name*\>

  Names the cell in which to run the command. Do not combine this argument with the **-localauth** flag. For more details, see [**bos**(8)](/bos/8.md).

- **-noauth**

  Assigns the unprivileged identity `"anonymous"` to the issuer. Do not combine this flag with the **-localauth** flag. For more details, see [**bos**(8)](/bos/8.md).

- **-localauth**

  Constructs a server ticket using a key from the local */etc/openafs/server/KeyFile* or */etc/openafs/server/KeyFileExt* file. The **bos** command interpreter presents the ticket to the BOS Server during mutual authentication. Do not combine this flag with the **-cell** or **-noauth** options. For more details, see [**bos**(8)](/bos/8.md).

- **-help**

  Prints the online help for this command. All other valid options are ignored.

## EXAMPLES

The following command removes the former database server machine `"db2.example.com"` from the *CellServDB* file on the system control machine `"fs1.example.com"`.

```
   % bos removehost -server fs1.example.com -host db2.example.com
```

## PRIVILEGE REQUIRED

The issuer must be listed in the */etc/openafs/server/UserList* file on the machine named by the **-server** argument, or must be logged onto a server machine as the local superuser `"root"` if the **-localauth** flag is included.

## SEE ALSO

[**KeyFile**(5)](/KeyFile/5.md), [**KeyFileExt**(5)](/KeyFileExt/5.md), [**UserList**(5)](/UserList/5.md), [**bos**(8)](/bos/8.md), [**bos\_addhost**(8)](/bos_addhost/8.md), [**bos\_listhosts**(8)](/bos_listhosts/8.md)

The *OpenAFS Quick Start Guide* at \<http://docs.openafs.org/QuickStartUnix/\>.

## COPYRIGHT

IBM Corporation 2000. \<http://www.ibm.com/\> All Rights Reserved.

This documentation is covered by the IBM Public License Version 1.0.  It was converted from HTML to POD by software written by Chas Williams and Russ Allbery, based on work by Alf Wachsmann and Elizabeth Cassell.