How to reset TIME_WAIT connection on my linux server ?
If you working as a system admin, you might have faced issue of multiple TIME_WAIT connections on a server resulting in no/slow connections to the specific server(s). To resolve such...
Tag: rhel
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How to identify /dev/mapper/path actual device on our linux system ?
Today in this post, we will look how to identify the lvm, or multipath device which is mapped by device mapper on our system. Device mapper automatically creates a pseudo...
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Explanation of /etc/prelink.cache & prelink.conf file : What is prelink cache in Linux ?
I. Introduction prelink as its name suggests is a program used to link ELF shared libraries and binaries in order to speed up startup time. Synopsis prelink [OPTION...] [FILES] prelink...
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How to turn off bell sound during TAB completion in linux ?
I. Introduction Let us have a look at an interesting tip today to turn off/on the bell sound during TAB completion. We will achieve this by changing inputrc file configuration....
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How to take dump or backup of all mysql databases in Linux ?
Today we will look how to take backup/dump of all mysql databases of our linux system from command line. I. Taking Backup To take backup, we will use mysqldump command...
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How to kill or clean zombie or defunct processes in linux ?
Processes marked as are zombie(Z in ps command output) processes (also called as “dead” processes) that remain in process table memory because their parent has not destroyed them properly after...
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Different ways to create a file in Linux ?
Today we will look at a very basic article to know various ways to create a file in linux. Lets see the various commands below. 1. Touch command [root@ngelinux ]#...
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How to update RHEL, or centos major release version: from RHEL 5 to RHEL 6, or from RHEL6 to RHEL 7 ?
Today in this post, we will look how to perform redhat or centos major release upgrade. I. RHEL 5 to RHEL 6 a. In-place upgrades between major RHEL versions...
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How to look/grep for special characters in a file in linux bash shell ?
Today in this post, we will look how to search or grep special characters in a file text. To search special characters in linux, we need to escape them using...
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How to test a valid IP address in Linux Bash Shell ?
Here is a quick tip to test a valid IP address on linux bash shell. I have recently used it in one of the scripts i need to prepare. I....