初始化linux系统&Shell脚本

dyok

　　此脚本出自http://kerry.blog.51cto.com/   很实用!
　　

• #!/bin/bash
  
• #CentOS System init script!!!
  
• 
  
• cat  /dev/null 2>&1" >> /etc/crontab
  
• service crond restart
  
• #设置 ulimit
  
• echo "ulimit -SHn 102400" >> /etc/rc.local
  
• #close ctrl+alt+del
  
• sed -i "s/ca::ctrlaltdel:\/sbin\/shutdown -t3 -r now/#ca::ctrlaltdel:\/sbin\/shutdown -t3 -r now/" /etc/inittab
  
• #设置用户权限安全
  
• #chmod 600 /etc/passwd
  
• #chmod 600 /etc/shadow
  
• #chmod 600 /etc/group
  
• #chmod 600 /etc/gshadow
  
• 
  
• #禁用IPV6
  
• echo "alias net-pf-10 off" >> /etc/modprobe.conf
  
• echo "alias ipv6 off" >> /etc/modprobe.conf
  
• /sbin/chkconfig --level 35 ip6tables off
  
• echo "ipv6 is disabled!"
  
• #禁用SElinux
  
• sed -i '/SELINUX/s/enforcing/disabled/' /etc/selinux/config
  
• echo "selinux is disabled,you must reboot!"
  
• #vim
  
• sed -i "8 s/^/alias vi='vim'/" /root/.bashrc
  
• echo 'syntax on' > /root/.vimrc
  
• #zh_cn
  
• sed -i -e 's/^LANG=.*/LANG="zh_CN.UTF-8"/'   /etc/sysconfig/i18n
  
• #设置SSH
  
• ssh_cf="/etc/ssh/sshd_config"
  
• sed -i -e '74 s/^/#/' -i -e '76 s/^/#/' $ssh_cf
  
• #sed -i "s/#Port 22/Port 65535/" $ssh_cf
  
• sed -i "s/#UseDNS yes/UseDNS no/" $ssh_cf
  
• #client
  
• sed -i -e '44 s/^/#/' -i -e '48 s/^/#/' $ssh_cf
  
• service sshd restart
  
• echo "ssh is init is ok.............."
  
• 
  
• #chkser
  
• #关掉不必要的服务
  
• #--------------------------------------------------------------------------------
  
• cat