linux命令之 history

[root@10-60-128-219 nginx]# history |grep nginx  #查看历史使用过的命令
  566  ps -ef |grep nginx
  567  cd /etc/nginx/
  569  cat nginx.conf
  578  cat nginx.conf
 1000  cd /etc/nginx/
 1002  vim nginx.conf
 1004  history |grep nginx