第1章 /etc/目录
1.1 /etc/sysconfig/network-scripts/ifcfg-eth0
linux第一块网卡的配置文件
[root@znix ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
HWADDR=00:0c:29:cb:69:ee
TYPE=Ethernet
UUID=38ad33ab-3d2b-4183-bd84-ce1766236ddd
ONBOOT=yes
NM_CONTROLLED=yes
BOOTPROTO=static
IPADDR=10.0.0.200
NETMASK=255.255.255.0
GATEWAY=10.0.0.2
USERCTL=no
PEERDNS=yes
IPV6INIT=no
DNS2=223.5.5.5
DNS1=119.29.29.29
1.2 /etc/resolv.conf
dns临时配置文件
[root@znix ~]# cat /etc/resolv.con
nameserver 119.29.29.29
nameserver 223.5.5.5
1.3 /etc/fstab
机自动挂载分区/磁盘，规定哪个分区/设备，挂载到哪里
root@znix ~]# cat /etc/fstab
#
# /etc/fstab
# Created by anaconda on Thu Aug 10 18:33:48 2017
#
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
#
UUID=49bad9e9-cf33-4a15-ba84-4fd28e70bd29 / ext4 defaults 1 1
UUID=7426d0f3-56d6-4fa6-a1c3-f2c8632bfbb8 /boot ext4 defaults 1 2
UUID=46bc0a52-b13f-4845-8baa-90207849d5c5 swap swap defaults 0 0
tmpfs /dev/shm tmpfs defaults 0 0
devpts /dev/pts devpts gid=5,mode=620 0 0
sysfs /sys sysfs defaults 0 0
proc /proc proc defaults 0 0
使用blkid 可以看设备的UUID唯一标识符
[root@znix ~]# blkid
/dev/sda3: UUID="49bad9e9-cf33-4a15-ba84-4fd28e70bd29" TYPE="ext4"
/dev/sda1: UUID="7426d0f3-56d6-4fa6-a1c3-f2c8632bfbb8" TYPE="ext4"
/dev/sda2: UUID="46bc0a52-b13f-4845-8baa-90207849d5c5"
1.4 /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。