系统优化脚本支持Ubuntu和CentOS 系统优化脚本支持Ubuntu和Cent

系统优化脚本支持Ubuntu和CentOS 安装系统后经常有一些基础的系统优化安装，本人比较懒，写了一个脚本，可以后期加入其他优化方面。
仓库地址：https://github.com/cby-chen/OS
【系统优化脚本支持Ubuntu和CentOS】后续可能会继续更新脚本
可以通过我的一键命令执行 bash -c "$(curl -L https://www.oiox.cn/os.sh)"
shell脚本如下

#!/bin/bash os=$(cat /etc/os-release 2>/dev/null | grep ^ID= | awk -F= '{print $2}')function selinuxset(){ selinux_status=$(grep -c "SELINUX=disabled" /etc/sysconfig/selinux) echo "========================禁用SELINUX========================" if [ "$selinux_status" -eq 0 ]; then sed-i "s#SELINUX=enforcing#SELINUX=disabled#g" /etc/sysconfig/selinux setenforce 0 grep SELINUX=disabled /etc/sysconfig/selinux getenforce else echo 'SELINUX已处于关闭状态' grep SELINUX=disabled /etc/sysconfig/selinux getenforce fi action "完成禁用SELINUX" /bin/true echo "===========================================================" sleep 3 }function firewalldset(){ echo "========================关闭firewalld=======================" echo '关闭防火墙' systemctldisable --now firewalld echo '验证如下' systemctl list-unit-files | grep firewalld echo '生产环境下建议启用' echo "===========================================================" sleep 3 }function ufwset(){ echo "========================关闭ufw============================" echo '关闭防火墙' systemctldisable --now ufw echo '验证如下' systemctl list-unit-files | grep ufw echo '生产环境下建议启用' echo "===========================================================" sleep 3 }function limitsset(){ echo "======================修改文件描述符========================" echo '加大系统文件描述符最大值' { echo '* soft nofile 65536' echo '* hard nofile 65536' echo '* soft nproc 65536' echo '* hard nproc 65536' } >> file echo '查看配置内容' cat /etc/security/limits.conf echo '设置软硬资源限制' ulimit -Sn ; ulimit -Hn echo "===========================================================" sleep 3 }function yumset(){ echo "======================开始修改YUM源========================" echo '开始修改YUM源' sudo sed -e 's|^mirrorlist=|#mirrorlist=|g' -e 's|^#baseurl=http://mirror.centos.org|baseurl=https://mirrors.tuna.tsinghua.edu.cn|g' -i.bak /etc/yum.repos.d/CentOS-*.repo echo '开始安装常规软件' yum update -y yum install curl git wget ntpdate lsof net-tools telnet vim lrzsz tree nmap nc sysstat epel* -y echo "===========================================================" sleep 3 }function aptset(){ echo "======================开始修改APT源========================" echo '开始修改APT源' apt_stat=$(cat /etc/apt/sources.list | grep -v ^\# | awk -F/ '{print $3}' | grep -v ^$| awk 'NR==1{print}') sudo sed -i "s/$apt_stat/mirrors.ustc.edu.cn/g" /etc/apt/sources.list echo '开始安装常规软件' apt update -y apt upgrade -y apt install vim htop net-tools lrzsz nmap telnet ntpdate sysstat curl git wget -y echo "===========================================================" sleep 3 }function restartset(){ echo "===================禁用ctrl+alt+del重启====================" rm -rf /usr/lib/systemd/system/ctrl-alt-del.target echo "完成禁用ctrl+alt+del重启" echo "===========================================================" sleep 3 }function historyset(){ echo "========================history优化========================" chk_his=$(cat /etc/profile | grep HISTTIMEFORMAT |wc -l) if [ $chk_his -eq 0 ]; then cat >> /etc/profile <<'EOF' #设置history格式 export HISTTIMEFORMAT="[%Y-%m-%d %H:%M:%S] [`whoami`] [`who am i|awk '{print $NF}'|sed -r 's#[()]##g'`]: " #记录shell执行的每一条命令 export PROMPT_COMMAND='\ if [ -z "$OLD_PWD" ]; then export OLD_PWD=$PWD; fi; if [ ! -z "$LAST_CMD" ] && [ "$(history 1)" != "$LAST_CMD" ]; then logger -t `whoami`_shell_dir "[$OLD_PWD]$(history 1)"; fi; export LAST_CMD="$(history 1)"; export OLD_PWD=$PWD; ' EOF source /etc/profile else echo "优化项已存在。" fi echo "完成history优化" echo "===========================================================" sleep 3 }function helloset(){ echo "========================欢迎界面优化========================" cat << EOF > /etc/profile.d/login-info.sh #!/bin/sh # # @Time: 2022-04-21 # @Author: chenby # @Desc: ssh login banner export PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin shopt -q login_shell && : || return 0 echo -e "\033[0; 32m ############## ####### ############### ####### ####### ########################by chenby\033[0m" # os upSeconds="\$(cut -d. -f1 /proc/uptime)" secs=\$((\${upSeconds}%60)) mins=\$((\${upSeconds}/60%60)) hours=\$((\${upSeconds}/3600%24)) days=\$((\${upSeconds}/86400)) UPTIME_INFO=\$(printf "%d days, %02dh %02dm %02ds" "\$days" "\$hours" "\$mins" "\$secs") if [ -f /etc/redhat-release ] ; then PRETTY_NAME=\$(< /etc/redhat-release) elif [ -f /etc/debian_version ]; then DIST_VER=\$(/dev/null | tail -1) disktotal=\$(awk '{print \$2}' <<< "\${totaldisk}") diskused=\$(awk '{print \$3}' <<< "\${totaldisk}") diskusedper=\$(awk '{print \$5}' <<< "\${totaldisk}") DISK_INFO="\033[0; 33m\${diskused}\033[0m of \033[1; 34m\${disktotal}\033[0m disk space used (\033[0; 33m\${diskusedper}\033[0m)" # cpu cpu=\$(awk -F':' '/^model name/ {print \$2}' /proc/cpuinfo | uniq | sed -e 's/^[ \t]*//') cpun=\$(grep -c '^processor' /proc/cpuinfo) cpuc=\$(grep '^cpu cores' /proc/cpuinfo | tail -1 | awk '{print \$4}') cpup=\$(grep '^physical id' /proc/cpuinfo | wc -l) CPU_INFO="\${cpu} \${cpup}P \${cpuc}C \${cpun}L" # get the load averages read one five fifteen rest < /proc/loadavg LOADAVG_INFO="\033[0; 33m\${one}\033[0m / \${five} / \${fifteen} with \033[1; 34m\$(( cpun*cpuc ))\033[0m core(s) at \033[1; 34m\$(grep '^cpu MHz' /proc/cpuinfo | tail -1 | awk '{print \$4}')\033 MHz" # mem MEM_INFO="\$(cat /proc/meminfo | awk '/MemTotal:/{total=\$2/1024/1024; next} /MemAvailable:/{use=total-\$2/1024/1024; printf("\033[0; 33m%.2fGiB\033[0m of \033[1; 34m%.2fGiB\033[0m RAM used (\033[0; 33m%.2f%%\033[0m)",use,total,(use/total)*100); }')" # network # extranet_ip=" and \$(curl -s ip.cip.cc)" IP_INFO="\$(ip a | grep glo | awk '{print \$2}' | head -1 | cut -f1 -d/)\${extranet_ip:-}" # Container info CONTAINER_INFO="\$(sudo /usr/bin/crictl ps -a -o yaml 2> /dev/null | awk '/^state: /{gsub("CONTAINER_", "", \$NF) ++S[\$NF]}END{for(m in S) printf "%s%s:%s ",substr(m,1,1),tolower(substr(m,2)),S[m]}')Images:\$(sudo /usr/bin/crictl images -q 2> /dev/null | wc -l)" # info echo -e " Information as of: \033[1; 34m\$(date +"%Y-%m-%d %T")\033[0m \033[0; 1; 31mProduct\033[0m............: \${MODEL_INFO} \033[0; 1; 31mOS\033[0m.................: \${PRETTY_NAME} \033[0; 1; 31mKernel\033[0m.............: \${KERNEL} \033[0; 1; 31mCPU\033[0m................: \${CPU_INFO} \033[0; 1; 31mHostname\033[0m...........: \033[1; 34m\$(hostname)\033[0m \033[0; 1; 31mIP Addresses\033[0m.......: \033[1; 34m\${IP_INFO}\033[0m \033[0; 1; 31mUptime\033[0m.............: \033[0; 33m\${UPTIME_INFO}\033[0m \033[0; 1; 31mMemory\033[0m.............: \${MEM_INFO} \033[0; 1; 31mLoad Averages\033[0m......: \${LOADAVG_INFO} \033[0; 1; 31mDisk Usage\033[0m.........: \${DISK_INFO} \033[0; 1; 31mUsers online\033[0m.......: \033[1; 34m\${USER_NUM}\033[0m \033[0; 1; 31mRunning Processes\033[0m..: \033[1; 34m\${RUNNING}\033[0m \033[0; 1; 31mContainer Info\033[0m.....: \${CONTAINER_INFO} " EOF echo "===========================================================" sleep 3 }function sshset(){ echo "========================root登录优化========================" echo "生产环境不建议开启设置root密码" read -p "输入root密码" rootpw echo "root:$rootpw" |chpasswd echo 'PermitRootLogin yes' >> /etc/ssh/sshd_config systemctl restart sshd echo "root密码修改为$rootpw" echo "===========================================================" sleep 3 }function allin() { if [ "$os" = "\"centos\"" ]; then selinuxset firewalldset limitsset yumset restartset historyset helloset fi if [ "$os" = "ubuntu" ]; then sshset ufwset limitsset aptset restartset historyset helloset fi }function menu() { clear echo "#####################################################################" echo -e "#${RED}一键基础优化脚本${PLAIN}#" echo -e "# ${GREEN}作者${PLAIN}: chenby#" echo -e "# ${GREEN}网址${PLAIN}: https://www.oiox.cn#" echo -e "# ${GREEN}版本${PLAIN}: V1.0#" echo -e "# ${GREEN}说明${PLAIN}:#" echo -e "##" echo "####################################################################" echo " -------------" echo -e "${GREEN}1.${PLAIN}一键优化" echo " -------------" echo -e "${GREEN}2.${PLAIN}自定义优化" echo " -------------" echo -e "${GREEN}0.${PLAIN}退出" echo " -------------"read -p " 请选择操作[0-2]：" chenby case $chenby in 0) exit 0 ; ; 1) allin ; ; 2) setun ; ; *) colorEcho $RED " 请选择正确的操作！" exit 1 ; ; esac }function setun() { echo " -------------" echo -e "${GREEN}1.${PLAIN}禁用SELINUX" echo " -------------" echo -e "${GREEN}2.${PLAIN}关闭firewalld" echo " -------------" echo -e "${GREEN}3.${PLAIN}关闭ufw" echo " -------------" echo -e "${GREEN}4.${PLAIN}修改文件描述符" echo " -------------" echo -e "${GREEN}5.${PLAIN}开始修改YUM源" echo " -------------" echo -e "${GREEN}6.${PLAIN}开始修改APT源" echo " -------------" echo -e "${GREEN}7.${PLAIN}禁用ctrl+alt+del重启" echo " -------------" echo -e "${GREEN}8.${PLAIN}history优化" echo " -------------" echo -e "${GREEN}9.${PLAIN}欢迎界面优化" echo " -------------" echo -e "${GREEN}10.${PLAIN} 设置root密码" echo " -------------" echo -e "${GREEN}0.${PLAIN}退出" echo " -------------"read -p " 请选择操作[0-2]：" cby case $cby in 0) exit 0 ; ; 1) if [ "$os" = "\"centos\"" ]; then selinuxset fi if [ "$os" = "ubuntu" ]; then echo 'Ubuntu无需设置' fi ; ; 2) if [ "$os" = "\"centos\"" ]; then firewalldset fi if [ "$os" = "ubuntu" ]; then echo 'Ubuntu无需设置' fi ; ; 3) if [ "$os" = "\"centos\"" ]; then echo 'CentOS无需设置' fi if [ "$os" = "ubuntu" ]; then ufwset fi ; ; 4) limitsset ; ; 5) if [ "$os" = "\"centos\"" ]; then yumset fi if [ "$os" = "ubuntu" ]; then echo 'Ubuntu无需设置' fi ; ; 6) if [ "$os" = "\"centos\"" ]; then echo 'CentOS无需设置' fi if [ "$os" = "ubuntu" ]; then aptset fi ; ; 7) restartset ; ; 8) historyset ; ; 9) helloset ; ; 10) if [ "$os" = "\"centos\"" ]; then echo 'CentOS无需设置' fi if [ "$os" = "ubuntu" ]; then sshset fi ; ; *) colorEcho $RED " 请选择正确的操作！" exit 1 ; ; esac }if [ $(id -u) -eq 0 ]; then menu else echo "非root用户!请使用root用户！！！" exit 1 fi