which whereis 查找

查找which
（1）which查找
[root@lsr7 ~]# which awk sed grep // 查找awk sed grep
alias grep='grep --color=auto'
/usr/bin/grep
/usr/bin/awk
/usr/bin/sed
（2）which撬棍
[root@lsr7 ~]# \which awk sed grep //如果不想显示别名就用 \ 撬棍
/usr/bin/awk
/usr/bin/sed
（3）whereis
/usr/bin/grep [root@lsr7 ~]# whereis sed
sed: /usr/bin/sed /usr/share/man/man1/sed.1.gz /usr/share/man/man1p/sed.1p.gz