Tar - « tape archiver » Preserve files permissions and ownership.
The Basic
1# Archive 2tar cvf mon_archive.tar <fichier1> <fichier2> </rep/doosier/> 3 4## Archive and compress with zstd everything in the current dir and push to /target/dir 5tar -I zstd -vcf archive.tar.zstd -C /target/dir . 6 7# Extract 8tar xvf mon_archive.tar 9 10# Extract push to target dir 11tar -zxvf new.tar.gz -C /target/dir Other usefull options • t : list archive’s content. • T : Archive list given by a file. • P : Absolute path is preserve (usefull for backup /etc) • X : exclude • z : compression Gunzip • j : compression Bzip2 • J : compression Lzmacd
Hosted-engine Administration Connect to VM hosted-engine with root and password setup during the install: 1# Generate a backup 2engine-backup --scope=all --mode=backup --file=/root/backup --log=/root/backuplog 3 4# Restore from a backup on Fresh install 5engine-backup --mode=restore --file=file_name --log=log_file_name --provision-db --restore-permissions 6engine-setup 7 8# Restore a backup on existing install 9engine-cleanup 10engine-backup --mode=restore --file=file_name --log=log_file_name --restore-permissions 11engine-setup host Administration Connect in ssh to the Host: 1# Pass a host in maintenance mode manually 2hosted-engine --vm-status 3hosted-engine --set-maintenance --mode=global 4hosted-engine --vm-status 5 6# Remove maintenance mode 7hosted-engine --set-maintenance --mode=none 8hosted-engine --vm-status 9 10# upgrade hosted-engine 11hosted-engine --set-maintenance --mode=none 12hosted-engine --vm-status 13engine-upgrade-check 14dnf update ovirt\*setup\* # update the setup package 15engine-setup # launch it to update the engine /!\ Connect individually to KVM Virtmanager does not work OVirt use libvirt but not like KVM do…
Most usefull shortcut Ctrl + r : Search and reverse. (ctrl+r pour remonter l’history). Ctrl + l : Clear the screen (instead to use “clear” command). Ctrl + p : Repeat last command. Ctrl + x + Ctrl + e : Edit the current command on an external editor. (Need to define export EDITOR=vim ). Ctrl + shift + v : Copy / paste in linux. Ctrl + a : Move to the begin of the line.
Ctrl + e : Move to the end of the line.
Ctrl + xx : Move to the opposite end of the line.
Ctrl + left : Move to left one word. Ctrl + right : Move to right one word.
Trust a CA on Linux host 1# [RHEL] RootCA from DC need to be installed on host: 2cp my-domain-issuing.crt /etc/pki/ca-trust/source/anchors/my_domain_issuing.crt 3cp my-domain-rootca.crt /etc/pki/ca-trust/source/anchors/my_domain_rootca.crt 4update-ca-trust extract 5 6# [Ubuntu] 7sudo apt-get install -y ca-certificates 8sudo cp local-ca.crt /usr/local/share/ca-certificates 9sudo update-ca-certificates
Server Idm - Identity Manager prerequisites :
repository configured NTP synchronize check config DHCP/DNS hostname -f == hostname acces to webui IDM : https://idm01.idm.ad-support.local/ipa/ui/ 1yum install -y ipa-server ipa-server-dns 2 3ipa-server-install \ 4 --domain=example.com \ 5 --realm=EXAMPLE.COM \ 6 --ds-password=password \ 7 --admin-password=password \ 8 --hostname=classroom.example.com \ 9 --ip-address=172.25.0.254 \ 10 --reverse-zone=0.25.172.in-addr.arpa. \ 11 --forwarder=208.67.222.222 \ 12 --allow-zone-overlap \ 13 --setup-dns \ 14 --unattended Client link to IDM 1yum install -y ipa-client 2 3ipa-client-install --mkhomedir --enable-dns-updates --force-ntpd -p admin@EXAMPLE.COM --password='password' --force-join -U 4 5# Test login 6echo -n 'password' | kinit admin Script if DNS config is right for a IDM server 1sudo sh -c "cat <<EOF > ~/IdmZoneCheck.sh 2#!/bin/bash 3### IdM zone check ### 4# Check if the zone name is provided as a parameter # 5if [ -z "$1" ]; 6then 7 echo -e "Provide the zone name to be checked as a parameter!\n(ex: IdmZoneCheck.sh domain.local)" 8 exit 9fi 10clear 11echo -e "### IDM / TCP ###\n\n" 12echo -e "TCP / kerberos-master (SRV)" 13dig +short _kerberos-master._tcp.$1. SRV 14echo -e "_TCP / kerberos (SRV)" 15dig +short _kerberos._tcp.$1. SRV 16echo -e "_TCP / kpasswd (SRV)" 17dig +short _kpasswd._tcp.$1. SRV 18echo -e "_TCP / ldap (SRV)" 19dig +short _ldap._tcp.$1. SRV 20echo -e "\n### IDM / UDP ###\n\n" 21echo -e "_UDP / kerberos-master (SRV)" 22dig +short _kerberos-master._udp.$1. SRV 23echo -e "_UDP / kerberos (SRV)" 24dig +short _kerberos._udp.$1. SRV 25echo -e "_UCP / kpasswd (SRV)" 26dig +short _kpasswd._udp.$1. SRV 27echo -e "\n### IDM / MSDCS DC TCP ###\n\n" 28echo -e "_MSDCS / TCP / kerberos (SRV)" 29dig +short _kerberos._tcp.dc._msdcs.$1. SRV 30echo -e "_MSDCS / TCP / ldap (SRV)" 31dig +short _ldap._tcp.dc._msdcs.$1. SRV 32echo -e "\n### IDM / MSDCS DC UDP ###\n\n" 33echo -e "_MSDCS / UDP / kerberos (SRV)" 34dig +short _kerberos._udp.dc._msdcs.$1. SRV 35echo -e "\n### IDM / REALM ###\n\n" 36echo -e "REALM (TXT)" 37dig +short _kerberos.$1. TXT 38echo -e "\n### IDM / CA ###\n\n" 39echo -e "A / ipa-ca" 40dig +short ipa-ca.$1. A 41echo -e "\n### IDM / A ###\n\n" 42echo -e "A / $HOSTNAME" 43dig +short $HOSTNAME. A 44EOF Script usage : 1./IdmZoneCheck.sh idm.ad-support.local
Prerequisistes Check Compatibilty hardware: Oracle Linux Hardware Certification List (HCL)
A minimum of two (2) KVM hosts and no more than seven (7).
A fully-qualified domain name for your engine and host with forward and reverse lookup records set in the DNS.
/var/tmp 10 GB space at least
Prepared a shared-storage (nfs or iscsi) of at least 74 GB to be used as a data storage domain dedicated to the engine virtual machine. ISCSI need to be discovered before oVirt install.
Manuals for commands man <cmd> : Open man page of command.
space : go ahead page by page. b : go back page by page. q : quit. Enter : go line by line. /<word> : search a word in man. n : go to the next expression that you search. N : go back to search expression. man -k <key word> : look for in all man for your key words.
man -k <word1>.*<word2> : “.*” allow to search several words. whatis <cmd> : give short explaination about the command.
Example 1# Import values with details connexion 2. .\values.ps1 3 4$scriptFilePath ="$MyPath\Install\MysqlBase\Script.sql" 5 6# Load the required DLL file (depend on your connector) 7[void][System.Reflection.Assembly]::LoadFrom("C:\Program Files (x86)\MySQL\MySQL Connector Net 8.0.23\Assemblies\v4.5.2\MySql.Data.dll") 8 9# Load in var the SQL script file 10$scriptContent = Get-Content -Path $scriptFilePath -Raw 11 12# Execute the modified SQL script 13$Connection = [MySql.Data.MySqlClient.MySqlConnection]@{ 14 ConnectionString = "server=$MysqlIP;uid=$MysqlUser;Port=3306;user id=$MysqlUser;pwd=$MysqlPassword;database=$MysqlDatabase;pooling=false;CharSet=utf8;SslMode=none" 15 } 16 $sql = New-Object MySql.Data.MySqlClient.MySqlCommand 17 $sql.Connection = $Connection 18 $sql.CommandText = $scriptContent 19 write-host $sql.CommandText 20 $Connection.Open() 21 $sql.ExecuteNonQuery() 22 $Connection.Close()
POO 1# Convert your json in object and put it in variable 2$a = Get-Content 'D:\temp\mytest.json' -raw | ConvertFrom-Json 3$a.update | % {if($_.name -eq 'test1'){$_.version=3.0}} 4 5$a | ConvertTo-Json -depth 32| set-content 'D:\temp\mytestBis.json' Example updating a XML 1#The file we want to change 2$xmlFilePath = "$MyPath\EXAMPLE\some.config" 3 4 # Read the XML file content 5 $xml = [xml](Get-Content $xmlFilePath) 6 7 $node = $xml.connectionStrings.add | where {$_.name -eq 'MetaData' -And $_.providerName -eq 'MySql.Data.MySqlClient'} 8 $node.connectionString = $AuditDB_Value 9 10 $node1 = $xml.connectionStrings.add | where {$_.name -eq 'Account'} 11 $node1.connectionString = $Account_Value 12 13 # Save the updated XML back to the file 14 $xml.Save($xmlFilePath) 15 16 Write-Host "$xmlFilePath Updated" Nested loop between a JSON and CSV 1# Read the JSON file and convert to a PowerShell object 2$jsonContent = Get-Content -Raw -Path ".\example.json" | ConvertFrom-Json 3 4# Read CSV and set a Header to determine the column 5$csvState = Import-CSV -Path .\referentials\states.csv -Header "ID", "VALUE" -Delimiter "`t" 6# Convert in object 7$csvState | ForEach-Object { $TableState[$_.ID] = $_.VALUE } 8 9# Loop through the Entities array and look for the state 10foreach ($item in $jsonContent.Entities) { 11 $stateValue = $item.State 12 13 # Compare the ID and stateValue then get the Value 14 $status = ($csvState | Where-Object { $_.'ID' -eq $stateValue }).VALUE 15 16 Write-Host "Status: $status" 17} Sources https://devblogs.microsoft.com/powershell-community/update-xml-files-using-powershell/
Satellite - Repository
Register your session Usefull to keep a track or document and share what have been done.
script : save all commandes and result in a “typescript” file. script -a : append to an existing “typescript” file (otherwise erase previous one).
exit : to stop session.
asciinema : save the terminal session in video.
For RHEL - something like Tlog exists and can be configure and centralised with Rsyslog.
Terminal /etc/DIR_COLORS.xterm define terminal colors dircolors change colors in the ls output
