Linux Centos 管理虚拟内存脚本
Manage you swap space by the shell script
wget https://www.moerats.com/usr/shell/swap.sh && bash swap.sh
然后根据选项进行操作，记得添加swap的时候填写纯数字，默认单位为M。
courtesy of:
1 #!/usr/bin/env bash 2 #Blog:https://www.moerats.com/ 3 4 Green="\033[32m" 5 Font="\033[0m" 6 Red="\033[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:" swapsize 27 28 #检查是否存在swapfile 29 grep -q "swapfile" /etc/fstab 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" /etc/fstab 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...${Font}" 54 sed -i '/swapfile/d' /etc/fstab 55 echo "3" > /proc/sys/vm/drop_caches 56 swapoff -a 57 rm -f /swapfile 58 echo -e "${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${Font}" 73 echo -e "———————————————————————————————————————" 74 read -p "请输入数字 [1-2]:" num 75 case "$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
