Linux system Administrator Technology (Admin)-------the third day

Modify host name #vim?/ROOT/.BASHRC

Package Management

1. Make the contents of the disc file appear in the system

[Email protected] ~]# mkdir?/rhel7

[email protected] ~]# mount?/dev/cdrom? /rhel7

Mount:/dev/sr0 write protection, will be mounted as read-only

[email protected] ~]# ls?/rhel7

[[email protected] ~]# ls?/rhel7/p (tab)

2.? RHEL7 RPM Package, convenient and quick

? RPM Package MANAGER,RPM Pack Manager

–rpm-q software name ...------------------? #查询软件包是否安装

–RPM-IVH Software Name-version information. RPM ...

–RPM-E software name ...-----------------means to unload the package.

[Email protected] ~]# rpm-q Firefox

Firefox-38.3.0-2.el7_1.x86_64

[Email protected] ~]# rpm-q haha

Package haha not installed?

[Email protected] ~]# rpm-q bash

Bash-4.2.46-19.el7.x86_64

[Email protected] ~]# rpm-q vsftpd??????? #查询软件包是否安装

[Email protected] ~]# rpm-ivh/rhel7/packages/? #安装软件包 vsftpd-3.0.2-10.el7.x86_64.rpm?

[Email protected] ~]# rpm-q vsftpd???? #查询软件包是否安装成功??

[Email protected] ~]# rpm-e vsftpd???? #卸载软件包

[Email protected] ~]# rpm-q vsftpd???? #查询软件包是否卸载成功

#######################################################

Import Red Hat signature information

[Email protected] ~]# rpm--import/rhel7/rpm-gpg-key-redhat-release

?

[Email protected] ~]# rpm-q vsftpd

Vsftpd-3.0.2-10.el7.x86_64

[Email protected] ~]# rpm-e vsftpd

[Email protected] ~]# rpm-ivh/rhel7/packages/vsftpd-3.0.2-10.el7.x86_64.rpm?

[Email protected] ~]# rpm-q vsftpd

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? Yum package management, automatically resolves dependencies

?? 1. Service side, mount the optical drive device, let the system appear CD content

? [email protected] ~]# mount?/dev/cdrom? /rhel7/

?? 2. Local client, modify configuration file, specify local as server

/etc/yum.repos.d/*.repo

? [Email protected] ~]# Vim/etc/yum.repos.d/rhel7.repo

? ? ? [haha]??????????? #指明仓库名称

Name=xixi???????? #仓库描述信息

Baseurl=file:///rhel7?? #指定本地为服务端, Rhel7 Directory

Enabled=1???????? #开启本文件

Gpgcheck=0???????? #不开启签名认证

? [email protected] ~]# yum repolist?? #列出仓库信息, no error can be

Use of the Yum Warehouse

–yum clean all????? Clear Cache

–yum repolist??????//Column Warehouse

–yum-y install software name ...? ?//Install software

–yum-y Remove software name ...? ?//Uninstall Software

[email protected] ~]# Yum Clean all

[email protected] ~]# Yum repolist

[Email protected] ~]# yum-y install httpd

[[email protected] ~]# yum-y install GCC

[Email protected] ~]# yum-y install System-config-kickstart

[Email protected] ~]# rpm-q httpd

[Email protected] ~]# rpm-q gcc

[Email protected] ~]# Poweroff?

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? Three pre-configured virtual machines on each learner's machine

–classroom--provides resources such as Gateway/dns/software materials

–server--as a practice server, password Redhat

–desktop--as a practice client, password Redhat

Restore three virtual machines

[[Email protected] Desktop]# rht-vmctl Reset Classroom

[[Email protected] Desktop]# rht-vmctl Reset Server

[[Email protected] Desktop]# rht-vmctl Reset Desktop

? Operating system version:

? ? Server:cat/etc/redhat-release??? 7.0

? ? Desktop:cat/etc/redhat-release?? 7.0

? IP Address:

? ? Server:? 172.25.0.11/24

? ? Desktop:172.25.0.10/24

? ? ? ? Real machine??? :?? 172.25.0.250/24

? ? Classroom:172.25.254.254/24

??

?? True remote management of virtual machine server and desktop:

? ?

??? telnet? PlainText transmission?? TCP 23

???????????????? TCP 22

? ? ? ? ? Format: SSH? User name @ip Address

"??????" Exit Remote Login

? ? ? Ctrl+shift+t: Open a new terminal

????? common options

?????-X: Allows local running of the other's graphics program

? ? ? ? ? Format: SSH-x user name @ip address

?? True on-machine: Permanently set the alias profile

? ? ? ??

[[Email protected] Desktop]# vim?/ROOT/.BASHRC

? Alias s= ' ssh-x [email protected] '

? Alias d= ' ssh-x [email protected] '

? ?。。。。。。

[[Email protected] Desktop]# in a new terminal verification

?????????????????????????????: Redhat?

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? Configure the Network

? Ifconfig command

–ifconfig [Interface Name]

–ifconfig-a

–ifconfig [Interface name] IPV4 address/Mask length

[[email protected] ~]# ping 127.0.0.1

[Email protected] ~]# ifconfig lo? down

[[email protected] ~]# ping 127.0.0.1

[Email protected] ~]# ifconfig?

[Email protected] ~]# ifconfig-a? #显示所有的网卡, including disabled network cards

[Email protected] ~]# ifconfig lo? up

[[email protected] ~]# ping 127.0.0.1

? Device=eth0????? #设备名

? Bootproto=none???? #手动配置

? Onboot=yes?????? #每次开机自动启用

? Ipaddr0=172.25.0.11? #IP地址

? Prefix0=24?????? #子网掩码

? gateway0=172.25.0.254? #网u关

4. Configure a permanent DNS server,/etc/resolv.conf

?? in the Linux system, the configuration file content, "#" begins with the comment text??

[[email protected] ~]# vim/etc/res (tab)

? nameserver? 172.25.254.254

##################################################

True on-Machine completion

1. Restart Nfs-server Shared Services

[Email protected] Desktop]# systemctl restart Nfs-server

2. Set nfs-server sharing service, random self-starting

[[Email protected] Desktop]# systemctl enable Nfs-server

3. Restore the Classroom virtual machine

[[Email protected] Desktop]# rht-vmctl Reset Classroom

4. Virtual Machine Validation

[email protected] ~]# Firefox 172.25.0.254

#####################################################

?? network type: Build Yum warehouse, server and client separation

? ?

? 1. The service side has been completed. Classroom build Web services, CD-ROM all content

??

? 2. On the server virtual machine, specify the Yum warehouse server.

[[email protected]/]# rm-rf/etc/yum.repos.d/*?? #删除所有客户端文件

[Email protected] ~]# vim?/etc/yum.repos.d/abc.repo

? [ABC]

? name=abc

? baseurl=http://172.25.254.254/content/rhel7.0/x86_64/dvd/

? enabled=1

? gpgcheck=0

[email protected]/]# Yum repolist

#######################################################

? Using the wget download tool

URL URLs for the –wget software package

–wget URL of the software package?-o/directory path/new file name

#? Firefox 172.25.0.254

# wget http://172.25.0.254/content/rhel7.0/x86_64/errata/Packages/kernel-3.10.0-123.1.2.el7.x86_64.rpm?

R

# uname-r------View kernel information

# RPM-IVH kernel-3.10.0-123.1.2.el7.x86_64.rpm

# reboot

# Uname-r

Linux system Administrator Technology (Admin)-------the third day