Steps to find the Installation date centos of a Operating system installed Linux CentOS and Red Hat
On a CentOS or RedHat based Operation system You can easily find the date and time of the Server is installed.
Method 1 : Using, rpm command to find the basesystem and using the basesystem information we can use rpm -qi to find Date and time.
Step 1 : First get the basesystem rpm by the below command.
rpm -qa | grep basesystem
eg. result below.
root@earn [~]# rpm -qa|grep basesystembasesystem-8.0-5.1.1.el5.centos
Step 2 : Copy the whole basesystem version number and input the below command.
eg. base on the above example
root@earn [~]# rpm -qi basesystem-8.0-5.1.1.el5.centosName : basesystem Relocations: (not relocatable)Version : 8.0 Vendor: CentOSRelease : 5.1.1.el5.centos Build Date: Wed 28 Mar 2007 09:28:19 AM ISTInstall Date: Wed 05 Dec 2014 10:50:41 AM IST Build Host: xxxxxxxxxGroup : System Environment/Base Source RPM: basesystem-8.0-5.1.1.el5.centos.src.rpmSize : 0 License: public domainSignature : DSA/SHA1, Wed 04 Apr 2007 05:50:20 AM IST, Key ID xxxxxxxxxxxxxxxSummary : The skeleton package which defines a simple CentOS Linux system.Description :Basesystem defines the components of a basic CentOS Linux system (forexample, the package installation order to use during bootstrapping).Basesystem should be the first package installed on a system, and itshould never be removed.
Another method to find and get the instalaltion aate of Operating system CentOS/Red Hat
Method 2 :
Using the Partition created Date on the Linux Environment.
We can also use tune2fs command
Step 1 : first type df -h
sbadmins@earn [~]# df -hFilesystem Size Used Avail Use% Mounted on/dev/sda2 39G 1.6G 36G 5% //usr/tmpDSK 3.4G 92M 3.1G 3% /tmp
Step 2 : use the below command to get the date teh filesystem created 🙂
tune2fs -l /dev/sda2
You can also use GREP command to filter the whole result.
sbadmins@earn [~]# tune2fs -l /dev/sda2 | grep createdFilesystem created: Wed Dec 5 16:19:37 2014