查看linux中shell的几种方法汇总
转:http://hi.baidu.com/mengfeiecit/item/bffb9a1b952cf0001994ec55
查看当前发行版可以使用的shell
[jack@localhost ~]$ cat /etc/shells?
/bin/sh
/bin/bash
/sbin/nologin
查看当前使用的shell
一、最常用的查看shell的命令,但不能实时反映当前shell
[jack@localhost ~]$ echo $SHELL
/bin/bash
二、下面这个用法并不是所有shell都支持
[jack@localhost ~]$ echo $0
bash
三、环境变量中shell的匹配查找
[jack@localhost ~]$ env | grep SHELL
SHELL=/bin/bash
四、口令文件中shell的匹配查找
[jack@localhost ~]$ cat /etc/passwd | grep jack
jack:x:500:500:mengfei:/home/jack:/bin/bash
五、查看当前进程
[jack@localhost ~]$ ps
PID TTY????????? TIME CMD
3052 pts/0??? 00:00:00 bash
3254 pts/0??? 00:00:00 ps
六、先查看当前shell的pid,再定位到此shell进程
[jack@localhost ~]$ echo $$
3052
[jack@localhost ~]$ ps -ef | grep 3052
jack??????? 3052 3047 0 11:33 pts/0??? 00:00:00 bash
jack??????? 3420 3052 0 11:57 pts/0??? 00:00:00 ps -ef
jack??????? 3421 3052 0 11:57 pts/0??? 00:00:00 grep 3052
附:一条命令即可实现:
[jack@localhost ~]$ ps -ef | grep `echo $$` | grep -v grep | grep -v ps
jack ?????? 3052 3047 0 11:33 pts/0??? 00:00:00 bash
七、输入一条不存的命令,查看出错的shell提示
[jack@localhost ~]$ tom
bash: tom: command not found
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