1./etc/motd 操作:echo " Authorized users only. All activity may be monitored and reported " > /etc/motd 效果:telnet和ssh登录后的输出信息 2. /etc/issue和/etc/issue.net 操作:echo " Authorized users only. All activity may be monitored and reported " &
#!/bin/bash #History: #2019/07/23 Fsq #This Program will check Permissions on dir PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/bin export PATH read -p "please input your dir:" dir if [ "$dir" == "" -