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Linux系统初始化脚本
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分享一个Linux系统初始化脚本，话不多说，上干货！
#/bin/bash# 设置时区并同步时间ln -s /usr/share/zoneinfo/Asia/Shanghai /etc/localtimeif ! crontab -l |grep ntpdate &>/dev/null ; then (echo "* 1 * * * ntpdate time.windows.com >/dev/null 2>&1";crontab -l) |crontabfi # 禁用selinuxsed -i '/SELINUX/{s/permissive/disabled/}' /etc/selinux/config # 关闭防火墙if egrep "7.[0-9]" /etc/redhat-release &>/dev/null; then systemctl stop firewalld systemctl disable firewalldelif egrep "6.[0-9]" /etc/redhat-release &>/dev/null; then service iptables stop chkconfig iptables offfi # 历史命令显示操作时间if ! grep HISTTIMEFORMAT /etc/bashrc; then echo 'export HISTTIMEFORMAT="%F %T `whoami` "' >> /etc/bashrcfi # SSH超时时间if ! grep "TMOUT=600" /etc/profile &>/dev/null; then echo "export TMOUT=600" >> /etc/profilefi # 禁止root远程登录sed -i 's/#PermitRootLogin yes/PermitRootLogin no/' /etc/ssh/sshd_config # 禁止定时任务向发送邮件sed -i 's/^MAILTO=root/MAILTO=""/' /etc/crontab # 设置最大打开文件数if ! grep "* soft nofile 65535" /etc/security/limits.conf &>/dev/null; then cat >> /etc/security/limits.conf << EOF * soft nofile 65535 * hard nofile 65535EOFfi # 系统内核优化cat >> /etc/sysctl.conf << EOFnet.ipv4.tcp_syncookies = 1net.ipv4.tcp_max_tw_buckets = 20480net.ipv4.tcp_max_syn_backlog = 20480net.core.netdev_max_backlog = 262144net.ipv4.tcp_fin_timeout = 20EOF # 减少SWAP使用echo "0" > /proc/sys/vm/swappiness # 安装系统性能分析工具及其他yum install gcc make autoconf vim sysstat net-tools iostat if谢谢你这么好看还关注我