Files in Linux

Post author:Karunesh Johri
Post published:May 1, 2020
Post category:Tutorials
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Files There are two basic concepts in Unix - processes and files. The processes do things and files keep all the important data. An efficient filesystem is important for an…

Connecting 7" touchscreen display to Raspberry Pi 4B

Post author:Karunesh Johri
Post published:November 14, 2019
Post category:Tutorials
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1.0 Introduction Raspberry Pi 4B has a Display Serial Interface (DSI) port for connecting a Raspberry Pi touchscreen display using a ribbon cable. In this post we will look at…

Uname command with examples

Post author:Karunesh Johri
Post published:November 2, 2019
Post category:Tutorials
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1. uname command The uname command prints information about the system. uname is a portmanteau word made up from "unix" and "name". uname can be called from the command line…

Getting started with Raspberry Pi

Post author:Karunesh Johri
Post published:September 10, 2019
Post category:Tutorials
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1.0 Raspberry Pi Raspberry Pi is a popular single board computer developed by the Raspberry Pi Foundation in the U.K. Raspberry Pi 4 Model B (Pi4B) was released in June…

systemd – System and service manager in Linux

Post author:Karunesh Johri
Post published:October 3, 2018
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systemd is the system and service manager under the Linux operating system. It is an init system for managing user processes. It also provides various daemons for device management, user…

Syslog

Post author:Karunesh Johri
Post published:October 3, 2018
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Syslog Syslog is a protocol for conveying event notification messages. Syslog was first developed by Eric Allman for logging as a part of the Sendmail project in the 1980s. It…

Find user login history – last and lastb commands in Linux

Post author:Karunesh Johri
Post published:October 3, 2018
Post category:Tutorials
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1.0 last and lastb The last command gives a chronological list of user logins in a Linux system for a period of time. The lastb commands gives a similar list…

tmpfs in Linux

Post author:Karunesh Johri
Post published:October 3, 2018
Post category:Tutorials
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1.0 tmpfs tmpfs is a filesystem that resides in the main memory of a Linux system. tmpfs stands for temporary file system. In the case of disk files, a file…

Cut command in Linux

Post author:Karunesh Johri
Post published:September 30, 2018
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1.0 cut The cut command cuts sections of each line of input files and writes it on its standard output. It is mostly used for taking out a few columns…

tr command in Linux

Post author:Karunesh Johri
Post published:September 30, 2018
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1.0 tr The tr command is a filter which reads the standard input, translates or deletes characters and writes on its standard output. The tr command syntax is, tr [OPTION]...…