Linux on oorkan

Bash histverify: Edit History Commands Before They Run

Tue, 10 Mar 2026 01:15:00 +0400

Linux’s history command helps you quickly find and reexecute commands you’ve run before. Running a command from history is as simple as typing !<the_command_id> and hitting Enter. You can find the command ID to the left of each command. For example, !1998 runs the command number 1998 in the history file.

⚠️ !<the_command_id> executes the given command immediately. Rerunning some commands (e.g., rm, git reset) this way can lead to unintended consequences.

How to Rename a Linux User

Thu, 04 Feb 2021 21:20:00 +0400

What if after installing a Linux OS you found that you made a typo in the username. Reinstalling the whole OS just to fix a typo doesn’t sound rational.

One solution can be removing the wrong user and creating a new one, with a correct name. But in that case, all programs that had configs in the user’s home directory will be messed up, which is very bad.

The correct way of renaming a Linux user and his home directory is to use the usermod command:

Making Screenshots in Linux Using Terminal - Part 2

Wed, 06 Jan 2021 22:00:00 +0400

In the previous part, we saw how to make screenshots in the terminal by using the xwd command. In this part, we’ll meet the import command.

Part 1 here. 🔗

Using the import command

The import command is part of imagemagick package. To install it, under Debian and Debian-based operating systems 🔗 you can run:

🚀 ~ sudo apt install imagemagick

As for xwd, import also relies on the X Window System.

Make Your Life Easier With Z Script

Sat, 26 Sep 2020 00:16:00 +0400

When working in terminal, we often need to jump through different directories. Keeping the track of directories we’ve changed to can be a tough task. One option can be using the history command in Linux:

history | grep cd

This is not an ideal solution because if the list is very long and we don’t remember the exact name of the directory we used before, then there we have problems. On the other hand, copy-pasting directory names from a list generated by the history command can be time-consuming.

Controlling the Time Settings in Linux via timedatectl

Sun, 20 Sep 2020 07:35:00 +0400

If our Linux OS has been booted using systemd, we can use a program called timedatectl to control its time settings. timedatectl is a utility of the systemd service manager and won’t be available in systems that aren’t using it 🔗. When typing timedatectl status in the terminal, it will show us the current time settings, like local time, time zone, network time synchronization, etc. Most of the systems, if not all, will pick this command as the default, and we can simply run timedatectl instead.

Making Screenshots in Linux Using Terminal - Part 1

Thu, 17 Sep 2020 05:35:00 +0400

Part 2 here. 🔗

Using the xwd command

If our Linux OS is using the X Window System, we can use the xwd (X window dump) command there to make screenshots. This command is part of a package called x11-apps. Under Debian-based operating systems 🔗, like Ubuntu, we can run sudo apt install x11-apps to install it.

🚀 ~ xwd -out screenshot.xwd

The command above will provide us a pointer to select the window we want to make a screenshot of. The problem here is that when we have another window in the foreground, that window will be captured as well, as shown in the illustration.

How to Reboot or Shutdown From Terminal in Linux

Thu, 30 Apr 2020 04:27:00 +0400

In all examples, we need to be root or use the command with sudo.

Reboot

reboot

poweroff --reboot

Note: In some systems, the reboot flag may not be available to use with poweroff command.

The reboot command can also be used with -f flag which stands for force option.

reboot -f

Important! When using the -f flag in reboot command, the machine will reboot immediately without properly closing the system. Be careful with it.

Linux: How the Name of Debian OS Was Formed?

Fri, 24 Apr 2020 02:51:11 +0400

The word Debian was formed of names of the OS creator Ian Murdock and his then-girlfriend Debra Lynn.

Linux Terminals I Use

Sun, 19 Apr 2020 20:49:56 +0400

Guake Terminal -> guake.org

Terminology -> enlightenment.org/about-terminology.md

How to display calendar in Linux terminal

Wed, 08 Apr 2020 07:58:05 +0400

Simply run the command cal in the terminal.

In most distros we can also run the command calendar which will display a list of memorial dates.

Thanks @davidwalshblog for bringing this to my attention.

Emojifying Your Linux Terminal

Sat, 17 Aug 2019 03:34:43 +0400

All of us wish to express their individualism. Customizing the tools we use is one of the ways to do it. This article will show how we can make our Linux terminal more interesting and user-friendly by tweaking it a little with some nice emoji.

In this experiment, I personally use Debian 10 (Buster) with Chromium web browser, and a terminal called Xfce Terminal, all are running on a virtual machine. The process should be very similar in other Linux distros as well. We’ll also need some site which contains cool emojis. I very like Emojipedia.