echo -n "当天日期:"
date
username=$1
if who|grep "$username"
then
echo "$username is in system"
echo "write a message to $username:"
write $username
else
echo "$username is not in system"
fi
输入:bash 4.10 jack
当天日期:2022年 03月 14日 星期一 21:27:07 CST
jack pts/1 2022-03-14 20:33 (192.168.254.166)
jack is in system
write a message to jack:
hello
jack这边的显示:
Message from root@Edu1 on pts/0 at 21:27 ...
hello