9.30

  • 设备挂载
 1 #将设备挂载到目录
 2 [root@wen mnt]# mount /dev/cdrom /mnt               
 3 mount: block device /dev/sr0 is write-protected, mounting read-only
 4 mount: /dev/sr0 already mounted or /mnt busy
 5 mount: according to mtab, /dev/sr0 is already mounted on /mnt
 6 #查看挂载情况
 7 [root@wen mnt]# df -h
 8 Filesystem      Size  Used Avail Use% Mounted on
 9 /dev/sda2       8.6G  2.3G  5.9G  29% /
10 tmpfs           491M     0  491M   0% /dev/shm
11 /dev/sda1       190M   36M  145M  20% /boot
12 /dev/sr0        3.7G  3.7G     0 100% /mnt
13 #查看设备挂载内容
14 [root@wen mnt]# cd /mnt/
15 [root@wen mnt]# ls
16 CentOS_BuildTag  RELEASE-NOTES-en-US.html       TRANS.TBL
17 EFI              RPM-GPG-KEY-CentOS-6           images
18 EULA             RPM-GPG-KEY-CentOS-Debug-6     isolinux
19 GPL              RPM-GPG-KEY-CentOS-Security-6  repodata
20 Packages         RPM-GPG-KEY-CentOS-Testing-6
21 
22 #有人可能会问我的系统盘没有挂载，怎么还能访问呀。是因为文件在开机的时候帮你自动挂载了，看下面的UUID
23 [root@wen mnt]# cat /etc/fstab
24 
25 #
26 # /etc/fstab
27 # Created by anaconda on Wed Aug 30 05:44:57 2017
28 #
29 # Accessible filesystems, by reference, are maintained under '/dev/disk'
30 # See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
31 #
32 UUID=9cdba9f6-6cdd-4db0-9733-a8d13ffeced0 /                       ext4    defaults        1 1
33 UUID=33512319-2a0e-425a-a38b-8369ffe6644f /boot                   ext4    defaults        1 2
34 UUID=8e555db5-2819-4483-baf5-f59c15495e29 swap                    swap    defaults        0 0
35 tmpfs                   /dev/shm                tmpfs   defaults        0 0
36 devpts                  /dev/pts                devpts  gid=5,mode=620  0 0
37 sysfs                   /sys                    sysfs   defaults        0 0
38 proc                    /proc                   proc    defaults        0 0
View Code
  •  网卡及DNS的配置
查询网关
[root@wen ~]# cd /etc/sysconfig/network-scripts/ 
[root@wen network-scripts]# route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
192.168.59.0    0.0.0.0         255.255.255.0   U     0      0        0 eth0
169.254.0.0     0.0.0.0         255.255.0.0     U     1002   0        0 eth0
0.0.0.0         192.168.59.2    0.0.0.0         UG    0      0        0 eth0                               #网关IP

查看DNS

  [root@wen network-scripts]# cat /etc/resolv.conf
  ; generated by /sbin/dhclient-script
  search localdomain
  nameserver 192.168.59.2

  ---->setup "network configuration" ,"DNS configuration " 就是修改/etc/resolv.conf

  修改网卡配置

  [root@wen ~]# vim /etc/sysconfig/network-scripts/ifcfg-eth0

  以上命令相当于使用如下图形界面配置：

　　

　　配置完保存，可查看配置文件

   [root@wen ~]# vim /etc/sysconfig/network-scripts/ifcfg-eth0

　　并重启网卡

　　[root@wen ~]#ifdown eth0 && ifup eth0

　　然后将SSH客户端IP改成上面刚刚重新配置的IP，重新连接，查看如下：

 

　　

 [root@wen ~]# ip add | grep 192
 inet 192.168.59.130/24 brd 192.168.59.255 scope global eth0

 小节：

  1. linux客户端DNS可以在网卡配置文件里设置（ifcfg-eth0)
  2. linux客户端DNS也可以在/etc/resolv.conf里设置
  3. 网卡里的设置DNS优先于/etc/resolv.conf，如果重启网络网卡的DNS会覆盖/etc/resolv.conf的设置
  • 更改主机名

永久更改主机名，需同时修改以下两项：

  1. vi /etc/sysysconfig/network  建议使用sed -i 's#HOSTNAME=wen#HOSTNAME=fadewalk#g' 
  2. hostname 主机名
[root@wen ~]# cat /etc/sysconfig/network
NETWORKING=yes
HOSTNAME=wen
[root@wen ~]# sed -i 's#HOSTNAME=wen#HOSTNAME=fadewalk#g' /etc/sysconfig/network
[root@wen ~]# cat /etc/sysconfig/network
NETWORKING=yes
HOSTNAME=fadewalk

[root@wen ~]# hostname fadewalk

 

posted @ 2017-09-30 20:27  元贞  阅读(219)  评论(0)  编辑  收藏  举报