CHSH(1)

名称
chsh - 更改登录 shell

大纲

chsh [选项] [登录]

描述

The chsh command changes the user login shell. This determines the name of the user's initial login command. A normal user may only change the login shell for her own account; the superuser may change the login shell for any account.

选项

chsh 命令可以接受的选项有：

-h, --help
    现实帮助信息并退出。

-R, --root CHROOT_DIR
    Apply changes in the CHROOT_DIR directory and use the configuration files from the CHROOT_DIR directory.

-s, --shell SHELL
    用户的新登录 shell 的名称。将此字段设置为空会让系统选择默认的登录 shell。

If the -s option is not selected, chsh operates in an interactive fashion, prompting the user with the current login shell. Enter the new value to change the shell, or leave the line blank to use the current one. The current shell is displayed between a pair of [ ] marks.

注意

The only restriction placed on the login shell is that the command name must be listed in /etc/shells, unless the invoker is the superuser, and then any value may be added. An account with a restricted login shell may not change her login shell. For this reason, placing /bin/rsh in /etc/shells is discouraged since accidentally changing to a restricted shell would prevent the user from ever changing her login shell back to its original value.

配置文件

在 /etc/login.defs 中有如下配置变量，可以用来更改此工具的行为：

CHSH_AUTH (boolean)
    如果 yes，chsh 程序在做任何更改之前都会要求认证，除非是以超级用户身份运行的。

LOGIN_STRING (string)
    此字符串用于提示输入密码。默认是 "Password: "，或者翻译了的结果(汉语中翻译为了“密码：”)。如果设置了此变量，提示不会被翻译。

    如果字符串包含 %s，将会被用户名替换。

文件

/etc/passwd
    用户账户信息。

/etc/shells
    可用的登录 shell 的列表。

/etc/login.defs
    Shadow 密码套件配置。

参见

chfn(1), login.defs(5), passwd(5).