Dahne 10.26linux Basic Learning Notes

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0. Real-computer remote management of virtual machines

Telnet plaintext Transmission TCP 23

SSH encrypted transmission TCP 22

ssh-x [email protected]//real machine remote management SERVER0 virtual machine

ssh-x [email protected]

View virtual machine version and kernel

cat/etc/redhat-release//view version

Uname-r//View kernel

Cat/proc/meminfo//View memory

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1. To permanently configure an alias file:
   

   Alias n= ' ls-l '//temporary configuration alias, will disappear after reboot

   So for some commonly used and more complex commands, you can use a permanent configuration alias file

   Example: ssh-x [email protected]

   ssh-x [email protected]
   

   VIM/ROOT/.BASHRC//Modify the. bashrc file under root (. xx for hidden files)
   

   #. BASHRC
   alias s= ' ssh-x [email protected] '
   Alias d= ' ssh-x [email protected] '//Set alias to D
   
   # User specific aliases and functions
   
   Alias rm= ' Rm-i '
   Alias cp= ' Cp-i '
   Alias mv= ' Mv-i '
   Alias Zh= ' convmv-r-f gb2312-t UTF8--notest '
   
   # Source Global Definitions
   if [-F/ETC/BASHRC]; Then
   . /etc/bashrc
   Fi
   [[email protected]/]# alias//view aliases
   Alias cp= ' Cp-i '
   alias d= ' ssh-x [email protected] '
   Alias egrep= ' Egrep--color=auto '
   Alias fgrep= ' Fgrep--color=auto '
   Alias grep= ' grep--color=auto '
   Alias l.= ' ls-d. *--color=auto '
   Alias ll= ' Ls-l--color=auto '
   Alias ls= ' ls--color=auto '
   Alias mv= ' Mv-i '
   Alias rm= ' Rm-i '
   alias s= ' ssh-x [email protected] '//Set Success
   Alias Which= ' Alias | /usr/bin/which--tty-only--read-alias--show-dot--show-tilde '
   Alias Zh= ' convmv-r-f gb2312-t UTF8--notest '
   

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3. Fixed Save host Name:

   Hostname WW//Set host name disappears after shutdown or reboot
   

   [[email protected] ~]# vim/etc/hostname//Modify etc hostname file
   

   desktop00.cn//Modify host Name
   [[email protected] ~]# cat/etc/hostname//view hostname file
   desktop00.cn
   [[Email protected] ~]#//modified successfully
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4. Configure IP address, subnet mask, gateway address

   (1) Modify etc under Ifcfg-eth0 file,
   

   Vim/etc/sysconfig/network-scripts/ifcfg-eth0

   Device=eth0
   BOOTPROTO=DHCP//
   Onboot=yes
   Type=ethernet
   Userctl=yes
   Peerdns=yes
   Ipv6init=no
   Persistent_dhclient=1
   

   (2)

   [[email protected "~]# nmcli connection show       //View network card name
   name            uuid                                    Type             device
   [[email protected "~]# nmcli Connection modify ' System eth0 ' ipv4.method manual ipv4.addresses ' 172.25.0.22/24 172.25.0.254 ' connection.autoconnect yes //Modify the Eth0 IP address to 172.25.0.10

   /24, Gateway to 172.0.254

   connection.autoconnect Yes //boot auto start
   

   [[email protected "~]# nmcli connection up ' System eth0 '   // Activating network configuration
   

   device=eth0          //Device name
   bootproto=none    //manual configuration
   onboot=yes          //Auto start on each boot
   type=ethernet
   Userctl=yes
   Ipv6init=no
   Persistent_dhclient=1
   ipaddr0=172.25.0.10      //IP Address
   prefix0=24               Subnet mask
   gateway0=172.25.0.254 //Gateway
   Defroute=yes
   ipv4_failure_fatal=no
   name= "System eth0"
   Uuid=5fb06bd0-0bb0-7ffb-45f1-d6edd65f3e03
   
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6. Package Management:

   Mount:

   Mkdir/rhel7
   Mount/dev/cdrom/rhel7
   Ls/rhel7
   Ls/rhell7/packages

   Rpm-q Firefox//query package is installed
   Rpm-ivh/rhel7/package/firefox. Install packages
   RPM-E Firefox/uninstall Package

   
   

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7. Yum Package Management/automatic resolution of dependencies

   * Server with client in a piece
   

   (1) Service side. Mount the optical drive device so that the system appears

   (2) Local client, modify configuration file, specify local as server
   

   Vim/etc/yum.repos.d/ww.repo //Modify ECT, Ww.repo file
   [WW]//Specify warehouse name
   NAME=WW//Warehouse Information description
   BASEURL=FILE///RHEL7//Specify Local as server, RHEL7 directory
   Enabled=1//Open this document
   Gpgcheck=0//Do not turn on signature authentication
   

   Yum Clean all//clear Yum Cache
   

   Yum repolist//Column Warehouse
   

   Yum-y Install Firefox//installation software
   Yum-y Remove Firefox//uninstall software
   

   
   

   * Server-side separation from client

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

   (2) Specify the Yum warehouse service on the server

   
   Vim/etc/yum/repos.d/ww.repo
   [WW]
   Name=ww
   baseurl=http://172.25.254.254/content/rhel7.0/x86_64/dvd/
   Enabled=1
   Gpgcheck=0
   

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6. Using the wget download tool

URL URLs for------wget software packages

URL of the------wget Package-o/destination path/new file name *.rpm

[email protected] ~]# Firefox 172.25.254.254

[email protected] ~]# wget http://172.25.254.254/content/rhel7.0/x86_64/errata/Packages/ Kernel-3.10.0-123.1.2.el7.x86_64.rpm-o/opt/ker.rpm

[Email protected] ~]# ls/opt
kernel-new.rpm ker.rpm RH Ww.txt

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7. Configuring a permanent DNS server

vim/etc/resolv.conf (tab)//Enter etc under res (tab) file O

NameServer 172.25.254.254

This article is from the "13392236" blog, please be sure to keep this source http://13402236.blog.51cto.com/13392236/1976561

Dahne 10.26linux Basic Learning Notes