linux 判断一个用户是否存在
#!/bin/bash read -p "please input a username:" username if id -u $username >/dev/null 2>&1; then echo "user exists" else echo "user does not exist" fi
把上面内存保存为 test.sh , 然后 sh test.sh 运行
#!/bin/bash read -p "please input a username:" username if id -u $username >/dev/null 2>&1; then echo "user exists" else echo "user does not exist" fi
把上面内存保存为 test.sh , 然后 sh test.sh 运行