How to write random or zero characters to a device in Linux ?
In this post we will look at an interesting feature of linux to write zeros or random characters to any device in Linux. One old way is to use dd...
Month: November 2019
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How to delete an array & its content in HPSSACLI or HP Smart Storage interface ?
We have seen how to create array in HPSSACLi earlier. Today we will look how to delete an array or logical drive in HP Smart Storage Admin CLI. Lets have...
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How to add Yubikey to ssh agent in Linux or Mac OS ?
Today we will look at a small tip, how to add YUBIKEY to our ssh-agent in Linux so that it doesn’t ask for password every time and authenticate the user...
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How to work on multiple servers together in a single time ?
Today we will introduce you to a very useful tip to perform server operations on multiple servers together. For this we will use a a application called csshx shared by...
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How to re-enable logical drive or disk in HP Prolient Servers ?
Most of the times we encounter an error when the server logical drive is failed and the system hangs. You can’t boot the system until and unless you re-enable the...
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How to delete logical drive in HP Smart Storage Administrator ?
Today in this post, we will look how to delete a logical drive on HP Proliant Servers. Lets have a look at the process step by step. 1. Reboot the...
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Solved: libvirt: Storage Driver error : internal error: storage volume name ‘XXX.ngelinux.com_disk1.qcow2’ already in use.
Today we will see how to correct one of the common error message seen when we try to add a virtual machine in KVM on RHEL server. Lets try to...
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Solved: Not able to see console after POST in Redhat Enterprise Linux or Centos.
Some Linux Operating Systems, or RHEL versions sometimes disable console video and you might be not able to see remote console after POST. This happens due to a kernel issue...
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systemd limit directives: Set ulimit in RHEL7 or CentOS 7
1. Resource limit directives, their equivalent ulimit shell commands and the unit used Directive ulimit equivalent Unit LimitCPU= ulimit -t Seconds LimitFSIZE= ulimit -f Bytes LimitDATA= ulimit -d Bytes LimitSTACK=...
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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...