sh2.sh

几个linux试验的脚本编程

#!/bin/bash
echo -e "type in the user name: \c"
read user
if
grep $user /etc/passwd>>/tmp/null
then
echo ""
else
echo "$user do not exist in the system."
exit
fi
if
who | grep $user>>/tmp/null
then
write $user<<rey
hello!
rey
echo "USERNAME  PID  COMMAND"
ps -aux | grep $user | awk '{print $1,"      ",$2,"      ",$11}' | more
else
mail $user<<oo
hello!
oo
fi