How to track where umount: /custom: target is busy ?
Lets see how to track where a partition is busy when it does not allow us to umount. I. Error Message [root@ngelinux001 ~]# umount /custom umount: /custom: target is...
Month: May 2022
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Solved: [error] Unable to obtain semaphore.
Today we will see an interesting article how to resolve below error. I. Error Details [root@ngelinux001 conf.d]# service httpd start Starting httpd: [Wed May 18 23:41:31 2022] [notice] suEXEC mechanism...
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Searching and installing package on SLES – Suse Enterprise Linux ?
In this article, we will see how to search and install a package in SUSE Enterprise Linux Server. 1. Search for the package in repository. ngelinux001 /home/user% zypper search libjpeg...
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Solved: chgrp: changing group of `testfile’: Operation not permitted. How to solve NFS 16 group limit ?
Today we will see an interesting issue and its solution why we are getting chgrp “changing group of testfile”: operation not permitted error. I. Error Details Below we can...
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Identify CPU clock speed when its not visible under different commands like lscpu ?
In this article, we will see how to check CPU clock speed on Linux or Unix servers when its not visible under different commands. 1. Check CPU Info [root@ngelinux001~]# cat...
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Solved: cron jobs stopped working automatically ?
Today we will see an interesting bug when the cron jobs stopped working on the system automatically. It is identified when we have multiple job schedulers available on the system....
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How to add a custom file in log rotation in linux ?
Today in this post, we will look how to add a custom file in log rotation. This will help to do automated housekeeping on the server. Lets suppose we have...
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How to check the IP address on linux machine if no ifconfig command is installed ?
Today we will see an interesting tip to see the IP address of a linux machine when no ifconfig utility is installed on server. Issue: ifconfig command not available [user@ngelinux02...