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你可以通过 $cat /etc/shells 来查看当前系统支持哪些shell类型。
[root@localhost log]# cat /etc/shells /bin/sh /bin/bash /sbin/nologin /bin/dash
你默认的shell类型在/etc/passwd文件下
eye:x:500:500::/home/eye:/bin/bash
Bash是一个GNU Shell, 当它启动时，会去读他的启动配置文件
Shell 第一个案例
#!/bin/bash clear echo "The script starts now." echo "Hi, $USER" echo echo "I will now fetch you a list of connected suers:" echo w echo echo "I‘m setting two variables now." COLOUR="black" VALUE="9" echo "This is a string: $COLOUR" echo "And this is a number: $VALUE" echo echo "I‘m giving you back your prompt now." echo
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原文地址：http://www.cnblogs.com/elewei/p/5908327.html
