Backup and Restore your Centos

Some time you want to take backup of your server including application and settings .below are the easy method a small example

1- The first step is to create a location to store the backup. For this article we’re going to store the backup on the same hard drive as the installed operating system

2-Make a backup directory where you will keep backup file.

mkdir /backup

3- Now we will create a compressed version of the Operating System in one single file (tarball) using the tar command.

tar cvpzf /backups/backup.tgz --exclude=/proc --exclude=/lost+found --exclude=/backups --exclude=/dev --exclude=/sys --exclude=/boot/grub --exclude=/boot/grub2 --exclude=/etc/fstab --exclude=/etc/sysconfig/network-scripts/ --exclude=/etc/udev/rules.d/70-persistent-net.rules  /

Now transfer your backup.tgz file to new server .In order to restore your server from the previously created tarball the server must have the same Operating System version loaded on it.

To Restore your backup use the following.

tar xvpfz /backups/backup.tgz -C /

Centos 5.X yum update

Update of packages using default repositories (base, update etc.) is no longer applicable.You should switch boxes, run on CentOS 5.x., to so called Vault repositories.

1- Disable base, updates and other enabled repositories (where enabled=1 is set) in the CentOS-Base.repo: 

sed -i 's/enabled=1/enabled=0/g' /etc/yum.repos.d/CentOS-Base.repo

create a new repo file and enter the following lines

vim  /etc/yum.repos.d/CentOS-Vault.repo

[c5.11-base]
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5
gpgcheck=1
name=CentOS-5.11 - Base
baseurl=http://vault.centos.org/5.11/os/$basearch/
exclude=ruby* libyaml* corosync* corosynclib* pacemaker*
enabled=1
[c5.11-updates]
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5
gpgcheck=1
name=CentOS-5.11 - Updates
baseurl=http://vault.centos.org/5.11/updates/$basearch/
exclude=ruby* libyaml* corosync* corosynclib* pacemaker*
enabled=1

original link :- https://docs.onapp.com/misc/eol-centos-5-x

How to update Centos 5 .X and cannot find a valid baseurl for repo

How to update Centos 5 .X and cannot find a valid baseurl for repo

If you are using CentOS 5.x and want to install any software and update CentOS 5.x  . you are getting following error .

root@server1 [~]# yum update -y
Loaded plugins: fastestmirror
Determining fastest mirrors
YumRepo Error: All mirror URLs are not using ftp, http[s] or file.
 Eg. Invalid release/
removing mirrorlist with no valid mirrors: /var/cache/yum/base/mirrorlist.txt
Error: Cannot find a valid baseurl for repo: base

This is because update repositories were moved to the CentOS vault when the operating reached it's end-of-life.

Edit the following file

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