Sysadmin tips and tricks for Linux and Android

Linux tips and tricks for faster and easier administration Linux servers and applications! Troubleshooting and solutions!

Thursday, 8 March 2018

Checking for softnofiles=4096; softnofiles=1024. Failed installation check issue with limits.com SOLVED and EXPLAINED

In case you have try to install some Oracle software you have to setup hard and soft limits. This is done in /etc/security/limits.conf. Aft...

Friday, 2 March 2018

SSH X11 forwarding Error: Can't open display: issue on rhel 7.x SOLVED and EXPLAINED

There is no need for installing XVNC server on your server or installing desktop environment in case someone need GUI for installing some a...

Tuesday, 6 February 2018

How to remove LUNZ from LINUX - EXPLAINED and SOLVED

What LUNZ are in a first place? When you attach storage to a server but you didn't yet assing any LUN's from storage to that serv...

WARNING: Re-reading the partition table failed with error 22: Invalid argument. - SOLVED and EXPLAINED

In case you have this WARNING while creating partition on multipath device WARNING: Re-reading the partition table failed with error 22:...

Thursday, 1 February 2018

Migrating data from LUN to LUN by using LVM or How to transfer data to new storage online by using LVM - SOLVED and EXPLAINED

So it's time to migrate you servers to new storage system or you just want to replace local hard drives. You can do this by calling you...

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