利用正则表达式实现yes/no判断

  1 #!/bin/bash
  2
  3 read -p "Please interput your choose: "  input
  4 [[ $input =~ ^([Yy][Ee][Ss]|[Yy])$ ]] && echo "YES"
  5 [[ $input =~ ^([Nn][Oo]|[Nn])$ ]] && echo "NO"

#!/bin/bash

 read -p "Please interput your choose: "  input
case $input in

[Yy][Ee][Ss]|[Yy])
  echo "YES"
;;
[Nn][Oo]|[Nn])
  echo "NO"
;;
*)
  echo "Wrong!"
esac

[03:43:25 root@C8-3-55 ~]#vim yn_1.1.sh
[04:17:58 root@C8-3-55 ~]#bash yn_1.1.sh
Please interput your choose: n
NO
[04:18:07 root@C8-3-55 ~]#bash yn_1.1.sh
Please interput your choose: y
YES
[04:18:11 root@C8-3-55 ~]#bash yn_1.1.sh d
Please interput your choose: d
Wrong!
[04:18:19 root@C8-3-55 ~]#bash yn_1.1.sh
Please interput your choose: f
Wrong!