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Category: Tips & Tricks

How to check the DNS server IP being used (Ubuntu 18.04+)

- December 22, 2022 | December 22, 2022 - ServerAdmin

If you’re using Ubuntu 18.04+ (or distro based on Ubuntu 18.04) and you would like to know which DNS servers are responsible for your connection, you can try the next …

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Email alert for SSH logins

- November 22, 2022 | November 22, 2022 - ServerAdmin

It is good idea to get notified when someone logs into your Linux server. First be sure that your server is able to send email (at least Postfix + valid …

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Simple pushtogit script

- June 24, 2022 | June 24, 2022 - ServerAdmin

Create new file and add the next lines inside (for example pushtogit.sh)   #!/bin/bash echo " ====================== running command from" $PWD cd $PWD git add . echo -n " ====================== …

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rsync tutorial

- January 19, 2018 | January 19, 2023 - ServerAdmin

Rsync is a command-line utility commonly used to copy files and folders from one location to another while preserving file attributes (permissions, ownership). In other words, it is used to …

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There is no suitable CSPRNG installed on your system

- March 3, 2017 - ServerAdmin

Some PHP packages may stop working after update with error message: “There is no suitable CSPRNG installed on your system”. The reason for this that they stopped using OpenSSL and …

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CentOS 6.x boot GRUB on software RAID /dev/md0

- February 28, 2017 | February 28, 2017 - ServerAdmin

If you’ve just installed CentOS 6.x on software RAID and it won’t boot from /dev/md0, don’t worry. It can be fixed. – Insert CentOS media/DVD and boot in rescue mode …

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Change hostname on Mint Linux / Ubuntu – Howto

- September 19, 2016 - ServerAdmin

To change your hostname, you’ll need to edit /etc/hostname file with sudo nano /etc/hostnamesudo nano /etc/hostname The file content is very simple. It contains the current hostname and all you …

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Command line system information

- September 8, 2016 - ServerAdmin

If you’re not sure which components are installed in your server/pc, you can use inxi which is a command line system information script. It will show you the system hardware, …

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Fix “Failed To Fetch” Apt error Howto

- March 7, 2016 - ServerAdmin

Google announced plans to discontinue 32-bit Google Chrome for Linux and it has. On some 64bit Ubuntu based systems (Mint/Kubuntu/Xubuntu,..), during update process you may notice the next error: “Failed …

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CentOS PPTP client Howto

- July 20, 2015 | July 20, 2015 - ServerAdmin

The Point-to-Point Tunneling Protocol (PPTP) is a method for implementing virtual private networks. Since it is marked as non secure and vulnerable, I don’t recommend it as a “final” VPN …

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  • How to upload an ISO image to the Proxmox server using the terminal
  • How to check the DNS server IP being used (Ubuntu 18.04+)
  • Email alert for SSH logins
  • Simple pushtogit script
  • SUDO CVE-2021-3156 and how to upgrade CentOS 6
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