45 如何在Linux下查看和切换shell

1、可以使用echo $SHELL来查看当前使用的shell

alloy@alloy:~$ echo $SHELL

/bin/bash

alloy@alloy:~$ ls -al /bin/sh

lrwxrwxrwx 1 root root 4 3月 15 10:13 /bin/sh -> dash

2、通过对/etc/shells的查看可以看到当前系统中安装的shell

alloy@alloy:~$ cat /etc/shells

# /etc/shells: valid login shells

/bin/sh

/bin/dash

/bin/bash

/bin/rbash

3、使用chsh可以在shell之间进行切换

alloy@raspberrypi:~/linuxshell/chapter9$ chsh

Password:

Changing the login shell for alloy

Enter the new value, or press ENTER for the default

Login Shell [/bin/bash]: /bin/dash

alloy@raspberrypi:~/linuxshell/chapter9$ echo $SHELL

/bin/bash

alloy@raspberrypi:~/linuxshell/chapter9$ chsh

Password:

Changing the login shell for alloy

Enter the new value, or press ENTER for the default

Login Shell [/bin/dash]: /bin/bash

alloy@raspberrypi:~/linuxshell/chapter9$