Thursday, July 7, 2022
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How to fix Ceph error states “oldest is osd_failure(failed timeout osd.xx)

Hi, If your Ceph cluster encounters a slow/blocked operation it will log it and set the cluster health into...

How to enable write cache for 3ware Raid controller

You can check the current cache status and then enable or disable it using the 3ware command line utility tw_cli. First lets see how...

Converting between image formats

qemu-img convert: raw, qcow2, qed, vdi, vmdk, vhd The qemu-img convert command can do conversion between multiple formats, including qcow2, qed, raw, vdi, vhd, and vmdk.

Configure Disk Quota on Ubuntu Server

Scenario: Disk quotas can be used to limit the amount of disk space or the number of files allocated...

Cannot access disk on zfs, Don’t Panic!!

I was having an issue with one of my Proxmox 5.0 version. When I was trying to start my VM it states...
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Safe Reboot Of Linux Using Magic SysRq Key

If you are working on kernel development, or device drivers, or running a code that could cause a kernel panic, the SysRq...

How to set a MySQL database to read-only mode

When we need to set the database as read-only on the fly (such as rebuild MySQL replication purpose) and we will use...

How to check LDAPS certificate and TLS version

Get OpenSSL (a list of 3rd party sites here; I went with this one). The connection to your DC thus: openssl...

How to run a manual backup on cPanel

You can use the /usr/local/cpanel/scripts/pkgacct script to create a cpmove archive for an account. After you create the archive, you can then restore the account on any cPanel...