更多目录知识 http://blog.51cto.com/yangrong/1288072
/etc/fstab
机自动挂载分区/磁盘，规定哪个分区/设备，挂载到哪里
1 [root@oldboy ~]# cat /etc/fstab 2 3 # 4 # /etc/fstab 5 # Created by anaconda on Sun Aug 12 17:26:53 2018 6 # 7 # Accessible filesystems, by reference, are maintained under '/dev/disk' 8 # See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info 9 # 10 UUID=c9b74b1a-41cd-4260-9444-6245ab833dd9 / ext4 defaults 1 1 11 UUID=8880df83-5bf8-40db-bf6f-bf878b7a7e2e /boot ext4 defaults 1 2 12 UUID=3144b92b-c079-4239-9a91-84111d2f1ac1 swap swap defaults 0 0 13 tmpfs //要挂载设备 /dev/shm //挂载点 tmpfs//文件系统类型defaults//挂在选项0//是否备份0//是否做开机自检查 14 devpts /dev/pts devpts gid=5,mode=620 0 0 15 sysfs /sys sysfs defaults 0 0 16 proc /proc proc defaults 0 0
/etc/resolv.conf
DNS临时配置文件
1 [root@oldboy ~]# cat /etc/resolv.conf 2 ; generated by /sbin/dhclient-script 3 search localdomain 4 nameserver 192.168.182.2 5 [root@oldboy ~]# vi /etc/resolv.conf 6 ; generated by /sbin/dhclient-script 7 search localdomain 8 nameserver 192.168.182.2 9 nameserver 8.8.8.8 10 ~ 11 ~ 12 ~ 13 ~ 14 "/etc/resolv.conf" 4L, 100C written 15 [root@oldboy ~]# cat /etc/resolv.conf 16 ; generated by /sbin/dhclient-script 17 search localdomain 18 nameserver 192.168.182.2 19 nameserver 8.8.8.8
/etc/hosts
主机名解析文件：
hosts文件里存放ip地址与域名的对应关系
作用：
- 开发，产品，测试等人员使用，用于通过正式域名测试产品
- 服务器之间的调用可以用域名（内部的DNS），方便迁移
[root@oldboy ~]# cat /etc/hosts 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
/etc/sysconfig/nework
[root@study ~]# cat /etc/sysconfig/network NETWORKING=yes HOSTNAME=study //主机名
修改主机名
- vim /etc/sysconfig/network
- sed -i 's#HOSTNAME=study#HOSTNAME=centos#g' /etc/sysconfig/network
/etc/rc.local
开机自启动程序命令存放的文件（chkconfig常用来管理yum/rmp安装的程序服务的自启动）
/etc/inittab
运行级别配置文件
/etc/issue
登陆提示配置文件
[root@study ~]# cat /etc/issue CentOS release 6.7 (Final) Kernel on an m
/var/log/messages
系统信息日志文件