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Linux For Beginners & Advanced Users

Tutorials, howtos, faqs, hacks, and tips about GNU/Linux operating systems for Linux users sorted by easy, intermediate and advanced level. ( rss feed ).

Debian / Ubuntu Linux Delete Old Kernel Images Command

I'm a new Ubuntu Linux user and noticed that old kernel still exists in my system. Why doesn't Ubuntu remove old kernels automatically? How do I delete old unused kernel images to free disk space. How to remove unused old kernel images on Ubuntu Linux safely?
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How To Install Microsoft Visual Studio Code on Linux

Visual Studio code (VScode) is the cross-platform Chromium-based code editor is being open sourced today by Microsoft. How do I install Microsoft Visual Studio Code on a Debian or Ubuntu or Fedora Linux desktop?
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How To See Characteristics of File Systems on Linux or Unix

How do I display the characteristics of file systems such as inodes, blocks, block size, file system name, state, lifetime writes, fsck status and more on Linux or Unix-like operating system?
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How To Install FreeBSD on Raspberry Pi 2 Model B

How do I install FreeBSD 10 or FreeBSD 11 (current) on Raspberry Pi 2 Model B? How do I flash the SD Card using Linux, OS X, FreeBSD or Unix-like operating system?
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How to Change a USER and GROUP ID on Linux For All Owned Files

I would like to know how to change a UID (USER ID)/GID (GROUP ID) and all belonging files on Linux operating system. Say, I want to change UID from 1005 to 2005 and GID from 1005 to 2005 on Linux. How do I make such change for belonging files and directories?
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How To Find Out HP Network Printer Serial Number Remotely Using Bash Shell On Linux or Unix

I manage a small network including couple of HP printers. Is there an easy way to access HP printer serial number in the terminal on Linux or Unix-like system? How do I find the model, product, and serial number on my HP printer using bash command line options?
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How To Wakeup Backup Nas Server and Mirror Files Using Rsync in Linux

I've a critical data stored on my small home server. I backup my Desktop, Laptop and a remote VPS server to my home nas server powered by Debian Linux using rsnapshot backup utility. In the event that my main nas server has a hardware (hard disk failure) problem, having mirrored files provides some sort of peace of mind. How do I mirror /backups/personal (total 100GB and growing everyday) to a secondary nas Linux server located in my network?
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How to Set Locales (i18n) On a Linux or Unix

What is a "locale" on a Linux operating system? How do I set or get locals (i18n) values on a Linux operating system?
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How To SSH Run Multiple Command On Remote Machine And Exit Safely

I have a backup sync program on local server. I have an ssh password less login set up, and I can run commands on an external server in bash script doing:

ssh root@server2 "sync; sync; /sbin/shutdown -h now"

How do I run multiple commands in bash on a remote Unix or Linux server? What is the best Way to SSH in and Run various unix commands in bash?
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How To Use apt-get with IPv4 or IPv6 Transport on a Ubuntu or Debian or Mint Linux

It is possible that I can forces my apt-get command command only use IPv6 or Ipv4 transport on a Debian or Ubuntu Linux server?
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