1+ #! /usr/bin/env bash
2+ # Blog:https://www.moerats.com/
3+ 4+ Green=" 033円[32m"
5+ Font=" 033円[0m"
6+ Red=" 033円[31m"
7+ 8+ # root权限
9+ root_need (){
10+ if [[ $EUID -ne 0 ]]; then
11+ echo -e " ${Red} Error:This script must be run as root!${Font} "
12+ exit 1
13+ fi
14+ }
15+ 16+ # 检测ovz
17+ ovz_no (){
18+ if [[ -d " /proc/vz" ; then
19+ echo -e " ${Red} Your VPS is based on OpenVZ,not supported!${Font} "
20+ exit 1
21+ fi
22+ }
23+ 24+ add_swap (){
25+ echo -e " ${Green} 请输入需要添加的swap,建议为内存的2倍!${Font} "
26+ read -p " 请输入swap数值:"
27+ 28+ # 检查是否存在swapfile
29+ grep -q " swapfile"
30+ 31+ # 如果不存在将为其创建swap
32+ if [ $? -ne 0 ]; then
33+ echo -e " ${Green} swapfile未发现,正在为其创建swapfile${Font} "
34+ fallocate -l ${swapsize} M /swapfile
35+ chmod 600 /swapfile
36+ mkswap /swapfile
37+ swapon /swapfile
38+ echo ' /swapfile none swap defaults 0 0' >> /etc/fstab
39+ echo -e " ${Green} swap创建成功,并查看信息:${Font} "
40+ cat /proc/swaps
41+ cat /proc/meminfo | grep Swap
42+ else
43+ echo -e " ${Red} swapfile已存在,swap设置失败,请先运行脚本删除swap后重新设置!${Font} "
44+ fi
45+ }
46+ 47+ del_swap (){
48+ # 检查是否存在swapfile
49+ grep -q " swapfile"
50+ 51+ # 如果存在就将其移除
52+ if [ $? -eq 0 ]; then
53+ echo -e " ${Green} swapfile已发现,正在将其移除...${Font} "
54+ sed -i ' /swapfile/d'
55+ echo " 3" > /proc/sys/vm/drop_caches
56+ swapoff -a
57+ rm -f /swapfile
58+ echo -e " ${Green} swap已删除!${Font} "
59+ else
60+ echo -e " ${Red} swapfile未发现,swap删除失败!${Font} "
61+ fi
62+ }
63+ 64+ # 开始菜单
65+ main (){
66+ root_need
67+ ovz_no
68+ clear
69+ echo -e " ———————————————————————————————————————"
70+ echo -e " ${Green} Linux VPS一键添加/删除swap脚本${Font} "
71+ echo -e " ${Green} 1、添加swap${Font} "
72+ echo -e " ${Green} 2、删除swap${Font} "
73+ echo -e " ———————————————————————————————————————"
74+ read -p " 请输入数字 [1-2]:"
75+ case " $num " in
76+ 1)
77+ add_swap
78+ ;;
79+ 2)
80+ del_swap
81+ ;;
82+ * )
83+ clear
84+ echo -e " ${Green} 请输入正确数字 [1-2]${Font} "
85+ sleep 2s
86+ main
87+ ;;
88+ esac
89+ }
90+ main
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