Linux Introduction - Revision history

Ian.percel at 18:55, 15 October 2021

2021-10-15T18:55:17Z

← Older revision		Revision as of 18:55, 15 October 2021
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	This page provides an introduction to the elements of working at the Linux command line and Bash scripting that are most relevant for users of the computing clusters managed by Research Computing Services (RCS) as well as Compute Canada. Working at the command line is an extremely valuable skill for anyone who handles and processes large collections of data. ([https://www.nature.com/articles/d41586-021-00263-0\| Nature - Five Reasons Why Researchers Should Learn to Love the Command Line]) The command line is a text-only interface that emphasizes automation of complex tasks through simple scripts or short sequences of commands. Relative to working with a graphical interface, it is somewhat less intuitive and takes some time to learn. However, with a few days of work it is possible to become proficient enough to be comfortable working on HPC systems.		This page provides an introduction to the elements of working at the Linux command line and Bash scripting that are most relevant for users of the computing clusters managed by Research Computing Services (RCS) as well as Compute Canada. Working at the command line is an extremely valuable skill for anyone who handles and processes large collections of data. ([https://www.nature.com/articles/d41586-021-00263-0\| Nature - Five Reasons Why Researchers Should Learn to Love the Command Line]) The command line is a text-only interface that emphasizes automation of complex tasks through simple scripts or short sequences of commands. Relative to working with a graphical interface, it is somewhat less intuitive and takes some time to learn. However, with a few days of work it is possible to become proficient enough to be comfortable working on HPC systems.

			=Linux Permissions=
	~~== Further Reading~~ ==		A detailed introduction to <code>ls -l</code> output and making sense of Linux permissions can be found in the wiki article: [[Linux Permissions]]
	*[https:/~~/linuxcommand.org/tlcl.php\|The~~ Linux ~~Command Line by William Shotts]~~
	~~A free book that provides a fairly illuminating dive into working at~~ the Linux ~~command line and Bash scripting. The main topics required for working on RCS clusters are covered in the first 4 chapters, although the chapters on shell scripting are also very useful.~~

	= Useful commands =		= Useful commands =
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	$ groups username		$ groups username

			= Further Reading =
			*[https://linuxcommand.org/tlcl.php\|The Linux Command Line by William Shotts]
			A free book that provides a fairly illuminating dive into working at the Linux command line and Bash scripting. The main topics required for working on RCS clusters are covered in the first 4 chapters, although the chapters on shell scripting are also very useful.

Dmitri: /* Change current Unix group */

2021-09-01T20:36:47Z

Change current Unix group

← Older revision		Revision as of 20:36, 1 September 2021
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	$ newgrp groupname		$ newgrp groupname

	command.		command. It temporarily changes your current default group to <code>groupname</code>.
			The command actually starts and new shell. Once the shell is exited the group changes back.

	To see all the groups you belong to:		To see all the groups you belong to:

Dmitri: /* Change current Unix group */

2021-08-05T03:54:58Z

Change current Unix group

← Older revision		Revision as of 03:54, 5 August 2021
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	It can be done by using the		It can be done by using the

	$ ~~newgroup~~ groupname		$ newgrp groupname

	command.		command.

			To see all the groups you belong to:

			$ groups

			or, for a specific user:

			$ groups username

Dmitri: /* Change the current group */

2021-08-05T03:53:39Z

Change the current group

← Older revision		Revision as of 03:53, 5 August 2021
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	= Useful commands =		= Useful commands =

	== Change ~~the~~ current group ==		== Change current Unix group ==

	If you are a member of several Unix groups on a system, you default group is normally your personal group with the same name as your user name.		If you are a member of several Unix groups on a system, you default group is normally your personal group with the same name as your user name.

Dmitri at 03:53, 5 August 2021

2021-08-05T03:53:10Z

← Older revision		Revision as of 03:53, 5 August 2021
Line 5:		Line 5:
	*[https://linuxcommand.org/tlcl.php\|The Linux Command Line by William Shotts]		*[https://linuxcommand.org/tlcl.php\|The Linux Command Line by William Shotts]
	A free book that provides a fairly illuminating dive into working at the Linux command line and Bash scripting. The main topics required for working on RCS clusters are covered in the first 4 chapters, although the chapters on shell scripting are also very useful.		A free book that provides a fairly illuminating dive into working at the Linux command line and Bash scripting. The main topics required for working on RCS clusters are covered in the first 4 chapters, although the chapters on shell scripting are also very useful.

			= Useful commands =

			== Change the current group ==

			If you are a member of several Unix groups on a system, you default group is normally your personal group with the same name as your user name.
			As a result, newly created files will normally have this group ownership.
			Sometimes you may want to force the new files to have a different group ownership.
			It can be done by using the

			$ newgroup groupname

			command.

Ian.percel at 18:58, 11 February 2021

2021-02-11T18:58:21Z

← Older revision		Revision as of 18:58, 11 February 2021
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	This page provides an introduction to the elements of working at the Linux command line and Bash scripting that are most relevant for users of the computing clusters managed by Research Computing Services (RCS) as well as Compute Canada. Working at the command line is an extremely valuable skill for anyone who handles and processes large collections of data. ([[https://www.nature.com/articles/d41586-021-00263-0\|Nature - Five Reasons Why Researchers Should Learn to Love the Command Line]]) The command line is a text-only interface that emphasizes automation of complex tasks through simple scripts or short sequences of commands. Relative to working with a graphical interface, it is somewhat less intuitive and takes some time to learn. However, with a few days of work it is possible to become proficient enough to be comfortable working on HPC systems.		This page provides an introduction to the elements of working at the Linux command line and Bash scripting that are most relevant for users of the computing clusters managed by Research Computing Services (RCS) as well as Compute Canada. Working at the command line is an extremely valuable skill for anyone who handles and processes large collections of data. ([https://www.nature.com/articles/d41586-021-00263-0\| Nature - Five Reasons Why Researchers Should Learn to Love the Command Line]) The command line is a text-only interface that emphasizes automation of complex tasks through simple scripts or short sequences of commands. Relative to working with a graphical interface, it is somewhat less intuitive and takes some time to learn. However, with a few days of work it is possible to become proficient enough to be comfortable working on HPC systems.


	== Further Reading ==		== Further Reading ==
	*[[https://linuxcommand.org/tlcl.php\|The Linux Command Line by William Shotts]]		*[https://linuxcommand.org/tlcl.php\|The Linux Command Line by William Shotts]
	A free book that provides a fairly illuminating dive into working at the Linux command line and Bash scripting. The main topics required for working on RCS clusters are covered in the first 4 chapters, although the chapters on shell scripting are also very useful.		A free book that provides a fairly illuminating dive into working at the Linux command line and Bash scripting. The main topics required for working on RCS clusters are covered in the first 4 chapters, although the chapters on shell scripting are also very useful.

Ian.percel: Intro to Linux Page with links to external resources

2021-02-11T18:57:49Z

Intro to Linux Page with links to external resources

New page

This page provides an introduction to the elements of working at the Linux command line and Bash scripting that are most relevant for users of the computing clusters managed by Research Computing Services (RCS) as well as Compute Canada. Working at the command line is an extremely valuable skill for anyone who handles and processes large collections of data. ([[https://www.nature.com/articles/d41586-021-00263-0|Nature - Five Reasons Why Researchers Should Learn to Love the Command Line]]) The command line is a text-only interface that emphasizes automation of complex tasks through simple scripts or short sequences of commands. Relative to working with a graphical interface, it is somewhat less intuitive and takes some time to learn. However, with a few days of work it is possible to become proficient enough to be comfortable working on HPC systems.

== Further Reading ==
*[[https://linuxcommand.org/tlcl.php|The Linux Command Line by William Shotts]]
A free book that provides a fairly illuminating dive into working at the Linux command line and Bash scripting. The main topics required for working on RCS clusters are covered in the first 4 chapters, although the chapters on shell scripting are also very useful.