闲来无事，弄了个跳板机脚本
#!/bin/sh
#fencatn
i=1
trapper(){
trap ':' INT EXIT TSTP TERM HUP #把常规的退出都屏蔽掉
}
main(){
while [ $i -le 3 ]
do
trapper
clear
let i++
cat<<menu
1)service1-test-192.168.31.145
2)mysql-test-192.168.31.147
3)没看懂上面写什么吧，给你翻译下：输入1或者输入2
4)最多试3次，再来就输入go命令
menu
echo '翻译：喊你输个数字，1或者2，注意，有彩蛋，你猜猜~'
read -p"Pls input a num.:" num
case $num in
1)
echo 'login in service1~192.168.31.145.'
echo '我们准备跳了，给你3秒思考人生，坐好扶稳~'
sleep 3
ssh [email protected]
;;
2)
echo 'login in mysql~192.168.31.147.'
echo '我们要跳了啊，给你5秒系安全带，坐好扶稳~'
sleep 5
ssh [email protected]
;;
110)
echo "your birthday:"
read -p "不错，猜对了，但是还没完，想想我们什么发工资，几号:" char
if [ "$char" = "10"];then
echo "猜对了，程序即将毁灭，虚拟机即将销毁，倒计时3秒开始"
exit
sleep 3
fi
;;
*)
echo "select error."
echo "输错了，哥子"
sleep 3
esac
done
}
main
写成个脚本，写到.bashrc就行了。我是以普通用户，放在/usr/bin/程序名，然后.bashrc添加这个程序名就行了
[jmp@nginx-test-jmp ~]$ ll /usr/bin/go
-rwxr-xr-x 1 root root 1359 Jul 3 11:29 /usr/bin/go
[jmp@nginx-test-jmp ~]$ tail -1 .bashrc
go
[jmp@nginx-test-jmp ~]$ tail .bashrc
# Source global definitions
if [ -f /etc/bashrc ]; then
. /etc/bashrc
fi
# Uncomment the following line if you don't like systemctl's auto-paging feature:
# export SYSTEMD_PAGER=
# User specific aliases and functions
go
[jmp@nginx-test-jmp ~]$
别忘了给脚本+x权限