|
|
#!/usr/bin/env bash
|
|
|
#Blog:https://www.moerats.com/
|
|
|
|
|
|
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 |
