mirror of https://github.com/stilleshan/code.git
98 lines
2.4 KiB
Bash
98 lines
2.4 KiB
Bash
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#!/usr/bin/env bash
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PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/bin
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export PATH
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# fonts color
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Green="\033[32m"
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Red="\033[31m"
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Yellow="\033[33m"
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GreenBG="\033[42;37m"
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RedBG="\033[41;37m"
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Font="\033[0m"
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# fonts color
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#root权限
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root_need(){
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if [[ $EUID -ne 0 ]]; then
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echo -e "${Red}Error:This script must be run as root!${Font}"
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exit 1
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fi
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}
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#检测ovz
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ovz_no(){
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if [[ -d "/proc/vz" ]]; then
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echo -e "${Red}Your VPS is based on OpenVZ，not supported!${Font}"
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exit 1
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fi
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}
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add_swap(){
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echo -e "${Green}请输入需要添加的 Swap 值,单位为 MB ,建议为内存的 2 倍.(例如输入:4096)${Font}"
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read -p "请输入 Swap 数值:" swapsize
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#检查是否存在swapfile
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grep -q "swap" /etc/fstab
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#如果不存在将为其创建swap
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if [ $? -ne 0 ]; then
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echo -e "${Green}swapfile 未发现，正在为其创建 swapfile${Font}"
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dd if=/dev/zero of=/swapfile bs=1M count=${swapsize}
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chmod 600 /swapfile
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mkswap /swapfile
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swapon /swapfile
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echo '/swapfile none swap defaults 0 0' >> /etc/fstab
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echo -e "${Green}swap 创建成功，并查看信息：${Font}"
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cat /proc/swaps
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cat /proc/meminfo | grep Swap
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else
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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}"
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fi
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}
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del_swap(){
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#检查是否存在swapfile
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grep -q "swap" /etc/fstab
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#如果存在就将其移除
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if [ $? -eq 0 ]; then
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echo -e "${Green}swapfile 已发现，正在将其移除...${Font}"
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sed -i '/swap/d' /etc/fstab
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echo "3" > /proc/sys/vm/drop_caches
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swapoff -a
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rm -f /swapfile
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echo -e "${Green}swap 已删除！${Font}"
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else
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echo -e "${Red}swapfile 未发现，swap 删除失败！${Font}"
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fi
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}
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#开始菜单
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main(){
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root_need
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ovz_no
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clear
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echo -e "———————————————————————————————————————"
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echo -e "${Green}一键添加/删除swap脚本${Font}"
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echo -e "${Green}1、添加swap${Font}"
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echo -e "${Green}2、删除swap${Font}"
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echo -e "———————————————————————————————————————"
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read -p "请输入数字 [1-2]:" num
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case "$num" in
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1)
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add_swap
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;;
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2)
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del_swap
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;;
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*)
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clear
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echo -e "${Green}请输入正确数字 [1-2]${Font}"
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sleep 2s
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main
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;;
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esac
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}
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main
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