In Linux terminal you can save not only an output of the individual commands using different types of redirections, but you can also capture and save to a file all the commands executed during a session and their output. All the commands executed in a Linux terminal and their output can be saved to a […]
linux
Mount LVM Partition in Rescue Mode
Usually, for the system repair purposes, such as troubleshooting of the boot-related issues (e.g. GRUB rescue) or for data recovery, it is required to know how to mount an LVM partition in a live Linux session (when a system boots from a live CD/DVD or from a special rescue USB stick). In this article i […]
Linux Rescue USB – Data Recovery & System Repair
Rescue and recovery disks are used for repairing a system and data after a crash on Linux and Windows devices. They are especially useful for troubleshooting of the boot-related issues and for data recovery. In this note i will show how to create a bootable rescue USB stick with a SystemRescue (also known as a […]
Network Printer is Printing Gibberish – Ubuntu/Linux
If your network printer is printing gibberish and random characters that is a common driver-related issue. I had this problem on Ubuntu and Linux Mint with my Samsung M2070 printer connected over Wi-Fi network. When I tried to print some single-page document, the printer went crazy and printed out a series of strange random symbols […]
Check BIOS Version in Ubuntu Linux – Command
BIOS is a firmware interface between a computer’s hardware and the operating system and like any software, it can be updated. Knowing the BIOS version can tell you if you have the most up-to-date version of the BIOS or it has to be updated. This note shows how to check the BIOS version in Ubuntu […]
‘GRUB_TIMEOUT’ Change – Not Working [SOLVED]
If you have tried to change a timeout in GRUB by setting the GRUB_TIMEOUT but this doesn’t work and you still see the 30 second timeout, this may be related to the GRUB’s “recordfail” feature. If the recordfail variable is being set to true, i.e. there was a failed boot attempt (or you use LVM/UEFI […]
Signing Failed: Agent Refused Operation [SOLVED]
While attempting to connect to some server over SSH, you may get the error as follows: sign_and_send_pubkey: signing failed for RSA “/home/<username>/.ssh/id_rsa” from agent: agent refused operation The “agent refused operation” error is usually caused by too open permissions on a private key file. In this short note i am showing how to fix this […]
Install Arduino IDE on Ubuntu Linux
Even though an Arduino IDE can be easily installed on Ubuntu-like Linux system using the simple apt install arduino command, the version you will can get this way will be quite old – without the latest features and complicity in getting help on the Internet. In this note i will show the recommended way of […]
Ctrl+Shift+Key Not Working – Ubuntu, Linux Mint
If you select the Ctrl + Shift combination to switch a keyboard layout in Ubuntu or Linux Mint, any other hotkeys with Ctrl + Shift + <Key> may stop working. This is a known bug in Xorg that can be fixed by applying this patch. This is a short note about how to fix the […]
BusyBox (initramfs): Ubuntu Boot Problem Fix
The “initramfs boot problem” on Ubuntu or Linux Mint is a situation when a computer does not boot up properly and instead of going straight to the login screen, drops you to the BusyBox shell with the initramfs command-line prompt. This error usually occurs when the partition containing the operating system got corrupted. Luckily this […]