问题 -bash: ls: command not found

centos 环境变量设置错误  -bash: ls: command not found

因为在 /etc/profile 环境变量中设置错误，到时环境无法使用

[root@kl ~]# ls
-bash: ls: command not found
[root@kl ~]# echo $PATH
/log/qt/erlang/bin:

解决方法：

[root@kl ~]# export PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin
[root@kl ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

在进入/etc/profile