以下脚本用于linux系统的初始化脚本，可以在服务器系统安装完毕之后立即执行。脚本结合各位大牛一些参数，已经在CentOS 5下通过。 使用方法：将其复制，保存为一个shell文件，比如
以下脚本用于linux系统的初始化脚本，可以在服务器系统安装完毕之后立即执行。脚本结合各位大牛一些参数，已经在CentOS 5下通过。
使用方法：将其复制，保存为一个shell文件，比如init.sh。将其上传到linux服务器上，执行sh init.sh。建议大家在系统安装后立即执行。
脚本内容:
#!/bin/bash #by LinuxEye #BLOG: http://blog.linuxeye.com #系统瘦身 yum -y groupremove "FTP Server" "Text-based Internet" "Windows File Server" "PostgreSQL Database" "News Server" "DNS Name Server" "Web Server" "Dialup Networking Support" "Mail Server" "Office/Productivity" "Ruby" "Office/Productivity" "Sound and Video" "X Window System" "X Software Development" "Printing Support" "OpenFabrics Enterprise Distribution" #安装依赖包 yum -y install gcc gcc-c++ autoconf libjpeg libjpeg-devel libpng libpng-devel freetype freetype-devel libxml2 libxml2-devel zlib zlib-devel glibc glibc-devel glib2 glib2-devel bzip2 bzip2-devel ncurses ncurses-devel curl curl-devel e2fsprogs e2fsprogs-devel krb5-devel libidn libidn-devel openssl openssl-devel nss_ldap openldap openldap-devel openldap-clients openldap-servers libxslt-devel libevent-devel ntp libtool-ltdl bison libtool vim-enhanced #关闭不必要的服务 chkconfig --list | awk '{print "chkconfig " $1 " off"}' > /tmp/chkconfiglist.sh;/bin/sh /tmp/chkconfiglist.sh;rm -rf /tmp/chkconfiglist.sh chkconfig crond on chkconfig irqbalance on chkconfig network on chkconfig sshd on chkconfig syslog on chkconfig iptables on setenforce 0 sed -i 's/^SELINUX=.*$/SELINUX=disabled/g' /etc/sysconfig/selinux#i18n
sed -i 's@LANG=.*$@LANG="en_US.UTF-8"@g' /etc/sysconfig/i18n
#修改启动模式 sed -i 's/id:.*$/id:3:initdefault:/g' /etc/inittab #关闭不需要的tty sed -i 's/3:2345:respawn/#3:2345:respawn/g' /etc/inittab sed -i 's/4:2345:respawn/#4:2345:respawn/g' /etc/inittab sed -i 's/5:2345:respawn/#5:2345:respawn/g' /etc/inittab sed -i 's/6:2345:respawn/#6:2345:respawn/g' /etc/inittab sed -i 's/ca::ctrlaltdel/#ca::ctrlaltdel/g' /etc/inittab /sbin/init q #修改PS1 echo 'PS1="\[\e[37;40m\][\[\e[32;40m\]\u\[\e[37;40m\]@\h \[\e[35;40m\]\W\[\e[0m\]]\\$ \[\e[33;40m\]"' >> /etc/profile #修改shell命令的history记录个数 sed -i 's/HISTSIZE=.*$/HISTSIZE=100/g' /etc/profile source /etc/profile #记录每个命令 mkdir /root/logs echo "export PROMPT_COMMAND='{ msg=\$(history 1 | { read x y; echo \$y; });user=\$(whoami); echo \$(date \"+%Y-%m-%d %H:%M:%S\"):\$user:\`pwd\`/:\$msg ---- \$(who am i); } >> \$HOME/logs/\`hostname\`.\`whoami\`.history-timestamp'" >> /root/.bash_profile #密码输错5次锁定180s sed -i '4a auth required pam_tally2.so deny=5 unlock_time=180' /etc/pam.d/system-auth #alias设置 sed -i '7a alias vi=vim' /root/.bashrc #调整Linux的最大文件打开数 echo "* soft nofile 60000" >> /etc/security/limits.conf echo "* hard nofile 65535" >> /etc/security/limits.conf echo "ulimit -SH 65535" >> /etc/rc.local #关闭ipv6 sed -i 's/NETWORKING_IPV6=.*$/NETWORKING_IPV6=no/g' /etc/sysconfig/network #网络参数调整 sed -i 's/net.ipv4.tcp_syncookies.*$/net.ipv4.tcp_syncookies = 1/g' /etc/sysctl.conf echo 'net.ipv4.tcp_tw_reuse = 1' >> /etc/sysctl.conf echo 'net.ipv4.tcp_tw_recycle = 1' >> /etc/sysctl.conf echo 'net.ipv4.ip_local_port_range = 1024 65000' >> /etc/sysctl.conf sysctl -p #校正时间 /usr/sbin/ntpdate ntp.api.bz echo '/usr/sbin/ntpdate ntp.api.bz > /dev/null 2>&1' > /var/spool/cron/root;chmod 600 /var/spool/cron/root /sbin/service crond restart #iptables配置 sed -i 's/IPTABLES_MODULES="ip_conntrack_netbios_ns"/#IPTABLES_MODULES="ip_conntrack_netbios_ns"/g' /etc/sysconfig/iptables-config cat > /etc/sysconfig/iptables << EOF # Firewall configuration written by system-config-securitylevel # Manual customization of this file is not recommended. *filter :INPUT DROP [0:0] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [0:0] -A INPUT -i lo -j ACCEPT -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT -A INPUT -p tcp -m state --state NEW -m tcp --dport 22 -j ACCEPT -A INPUT -p tcp -m state --state NEW -m tcp --dport 80 -j ACCEPT -A INPUT -p icmp -m limit --limit 100/sec --limit-burst 100 -j ACCEPT -A INPUT -p icmp -m limit --limit 1/s --limit-burst 10 -j ACCEPT # -A INPUT -p udp -m udp --dport 20 -j ACCEPT COMMIT EOF /sbin/service atd start echo "/sbin/service iptables stop" | at now+3minutes /sbin/service iptables restart
