ps | grep $$ | awk '{print $4}'
不带参数的ps命令显示和当前终端有关的进程状况$$变量存储当前进程的PIDps第四列是进程所使用的命令,如果是Shell,那么显示shell名,比如sh/ksh等awk '{print $4}'就是只显示第四列的值PS:用echo $SHELL可以查看系统默认的shell查看当前发行版可以使用的shell
[jack@localhost ~]$ 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 $0bash三、环境变量中shell的匹配查找
[jack@localhost ~]$ env | grep SHELLSHELL=/bin/bash四、口令文件中shell的匹配查找
[jack@localhost ~]$ cat /etc/passwd | grep jackjack:x:500:500:mengfei:/home/jack:/bin/bash五、查看当前进程
[jack@localhost ~]$ psPID TTY TIME CMD3052 pts/0 00:00:00 bash3254 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 $$3052[jack@localhost ~]$ ps -ef | grep 3052jack 3052 3047 0 11:33 pts/0 00:00:00 bashjack 3420 3052 0 11:57 pts/0 00:00:00 ps -efjack 3421 3052 0 11:57 pts/0 00:00:00 grep 3052附:一条命令即可实现:
[jack@localhost ~]$ ps -ef | grep `echo $$` | grep -v grep | grep -v psjack 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 ~]$ tombash: tom: command not found
原帖:http://rickie622.blog.163.com/blog/static/212388112011213407503/