一些命令

tail -n 30  /var/log/messages | grep named

ssh-keygen -b 1024 -t rsa

scp /root/.ssh/id_rsa.pub root@192.168.1.181:/root/.ssh/authorized_keys

B

chmod 600 /root/.ssh/authorized_keys

开机启动的选项在这里

 /etc/grub.conf -> ../boot/grub/grub.conf

前者是个软连接

例1：监控某个进程

 ps -eo pid,etime|egrep '(7716|7670)'

 例2： tail -n 30  /var/log/messages | grep named

cat  /var/log/messages | grep named

例3：yum erase bind-9.8.2-0.17.rc1.el6_4.6.x86_64

http://songzj.iteye.com/blog/1920773

例4：查看端口是否被占用

netstat -tunlp|grep 53