方法：find 目录 -type f | xargs grep -i "内容" 2>/dev/null

例：

希望找出操作系统中包含本机IP的所有文件

# find / -type f | xargs grep -i "192.168.1.40" 2>/dev/null

# find /etc  -type f | xargs grep -i "10.239.44.35" 2>/dev/null

/etc/hosts:10.239.44.35 controller 

/etc/nova/nova.conf_bak-2:my_ip = 10.239.44.35

/etc/nova/nova.conf_bak-2:vncserver_listen = 10.239.44.35

/etc/nova/nova.conf_bak-2:vncserver_proxyclient_address = 10.239.44.35

/etc/nova/nova.conf_bak-2:novncproxy_base_url = http://www.landui.com:6080/vnc_auto.html

/etc/nova/nova.conf:my_ip = 10.239.44.35

/etc/nova/nova.conf:vncserver_listen = 10.239.44.35

/etc/nova/nova.conf:vncserver_proxyclient_address = 10.239.44.35

/etc/nova/nova.conf:novncproxy_base_url = http://www.landui.com:6080/vnc_auto.html

/etc/sysconfig/network-scripts/ifcfg-enp0s26ulu2:IPADDR=10.239.44.35

/etc/my.cnf.d/mariadb_openstack.cnf:bind-address = 10.239.44.35

命令解释 

查找系统中的文件类型为file的文件，然后通过grep过滤关键字。