Linux

Using WP-CLI you can create MO files from PO files using the following command:

1. Begin by pvcreate’ing the new disk. This is the disk from the new storage array to which we want to migrate to. # pvcreate /dev/mapper/mpathY 2. Now, add this disk into the data_vg Volume Group : # vgextend data_vg…

With systemd you can configure the service so that it automaticaly restarts the service in case the service crashes.It’s enough to add the “restart” option to the [service] stanza within the service systemd configuraiton file.See example below. Of course, you…

Once in a while the clamd process can get killed because of memory usage. It turns out it would always get killed when reloading the database after an update. This is due to the fact that during a database reload clamd will…

With curl you can test if your website supports http2. Just execute the following curl command:

I was building a new system for hosting, and that system is a virtualised system with  Ubuntu. The OS was built by the provider. After installing everything, I wanted to activate the quota on the filesystem. The quota check failed with…

In case you have a screen with high resolutions, a 4k screen for example, it is possible that GRUB is incredibly slow. If that is the case, the workaround is to edit the /etc/default/grub file, and add/replace the following line…

This guide, coming from Google, explains how to use a dynamic IPsec VPN tunnel with strongSwan on Linux Step 1: Configure BIRD   # Config example for bird 1.6 #debug protocols all;router id 169.254.2.2;# Watch interface up/down eventsprotocol device…

If you have upgraded your old Commvault agent,or you still use an old Commvault agent on your linux ‘systemd’ system, there won’t be any start/stop script for the agent. You can use the workaround below for creating a systemd file…

In order to optimize all databases & tables within your mysql instance, you can use the code below. You can also use a more specific script, where only the tables are optimized which have 10MB free space and 10% free…

In SLES you can search & install specific CVE patches using the commands below.

If you do a df, and you compare those values with ‘du’, it is possible that those values don’t match. There are multiple reasons why this can happen, and one of those reasons if that files where deleted, but that…

You can use the following shell commands in order to redirect a port to another port.

Using the “stress” application, you can simulate high memory usage of your system.You may use the following command line:  

You can optimize Jpeg images on linux command line (= reduce the size to load images faster).In order to achieve that, you can make use of the ‘jpegoptim’ application.On ubuntu/debian systems:   To optimize the jpeg file:

Create a file ‘allowed-hosts’ in the ‘work_dir’ (can be found in the denyhosts.conf file), which is /var/lib/denyhosts on Ubuntu, containing the ip.See the example below:

Find IP Address to Unblock Log in to your server via SSH and type in the following command: iptables -L -n Look for the IP address you want to unblock / unban. Now we must find the jail name this…

First, edit the config file : vi Then, check the line : ignoreip = Add now add all ip you want. Each IP or range IP must be placed here with a space. Ex: 192.168.0.1 192.168.5.0/32 Save. And restart…