xym / swap.sh

#!/usr/bin/env bash #Blog:https://www.moerats.com/ #https://www.moerats.com/archives/722/ #wget https://www.moerats.com/usr/shell/swap.sh && bash swap.sh Green="\033[32m" Font="\033[0m" Red="\033[31m" #root权限 root_need(){ if [[ $EUID -ne 0 ]]; then echo -e "${Red}Error:This script must be run as root!${Font}" exit 1 fi } #检测ovz ovz_no(){ if [[ -d "/proc/vz" ]]; then echo -e "${Red}Your VPS is based on OpenVZ，not supported!${Font}" exit 1 fi } add_swap(){ echo -e "${Green}请输入需要添加的swap，建议为内存的2倍！${Font}" read -p "请输入swap数值:" swapsize #检查是否存在swapfile grep -q "swapfile" /etc/fstab #如果不存在将为其创建swap if [ $? -ne 0 ]; then echo -e "${Green}swapfile未发现，正在为其创建swapfile${Font}" fallocate -l ${swapsize}M /swapfile chmod 600 /swapfile mkswap /swapfile swapon /swapfile echo '/swapfile none swap defaults 0 0' >> /etc/fstab echo -e "${Green}swap创建成功，并查看信息：${Font}" cat /proc/swaps cat /proc/meminfo | grep Swap else echo -e "${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}" fi } del_swap(){ #检查是否存在swapfile grep -q "swapfile" /etc/fstab #如果存在就将其移除 if [ $? -eq 0 ]; then echo -e "${Green}swapfile已发现，正在将其移除...${Font}" sed -i '/swapfile/d' /etc/fstab echo "3" > /proc/sys/vm/drop_caches swapoff -a rm -f /swapfile echo -e "${Green}swap已删除！${Font}" else echo -e "${Red}swapfile未发现，swap删除失败！${Font}" fi } #开始菜单 main(){ root_need ovz_no clear echo -e "———————————————————————————————————————" echo -e "${Green}Linux VPS一键添加/删除swap脚本${Font}" echo -e "${Green}1、添加swap${Font}" echo -e "${Green}2、删除swap${Font}" echo -e "———————————————————————————————————————" read -p "请输入数字 [1-2]:" num case "$num" in 1) add_swap ;; 2) del_swap ;; *) clear echo -e "${Green}请输入正确数字 [1-2]${Font}" sleep 2s main ;; esac } main