linux - 减少 bash 脚本中命令的重复

Question

我正在编写一个 bash 脚本来增加 VPS 服务器上的/tmp，我想让它更干净/更高效，而无需为选择的任何选项重复相同的命令。现在的结构如下:

#!/bin/bash

  showMenu () {
        echo "1) Increase /tmp size to 1 GB"
        echo "2) Increase /tmp size to 2 GB"
        echo "3) Quit"
}
   while [ 1 ]
   do
       showMenu
       read CHOICE
       case "$CHOICE" in

  "1")
       /etc/init.d/mysql stop
       /etc/init.d/httpd stop
       /etc/init.d/cpanel stop
       cp -af /var/tmp /var/tmp.bak
       umount -l /var/tmp
       umount -l /tmp
       rm -f /usr/tmpDSK
       dd if=/dev/zero of=/usr/tmpDSK bs=1M count=1k
       mkfs.ext3 -F /usr/tmpDSK
       mount -t ext3 -o nosuid,noexec,loop /usr/tmpDSK /tmp
       mount -o bind,noexec,nosuid /tmp /var/tmp
       cp -a /var/tmp.bak/* /tmp/
       rm -rf /var/tmp.bak/
       chmod 1777 /tmp
       /etc/init.d/mysql start
       /etc/init.d/httpd start
       /etc/init.d/cpanel start
       df -h
       exit 1
       ;;

    "2")
       /etc/init.d/mysql stop
       /etc/init.d/httpd stop
       /etc/init.d/cpanel stop
       cp -af /var/tmp /var/tmp.bak
       umount -l /var/tmp
       umount -l /tmp
       rm -f /usr/tmpDSK
       dd if=/dev/zero of=/usr/tmpDSK bs=1M count=2k
       mkfs.ext3 -F /usr/tmpDSK
       mount -t ext3 -o nosuid,noexec,loop /usr/tmpDSK /tmp
       mount -o bind,noexec,nosuid /tmp /var/tmp
       cp -a /var/tmp.bak/* /tmp/
       rm -rf /var/tmp.bak/
       chmod 1777 /tmp
       /etc/init.d/mysql start
       /etc/init.d/httpd start
       /etc/init.d/cpanel start
       df -h
       exit 1
       ;;

    "3")
        exit 1
       ;;
      esac
    done

在此过程中，我基本上只想启动一次冗余命令。你能给我一个或多个关于执行此操作的最佳方法的想法吗？

谢谢。

Answer 1

听起来很适合 bash function .将代码的主体放在函数中，然后传递大小参数。