Centos Bash Shell Scripts - Revision history

Bacchas at 14:21, 28 August 2019

2019-08-28T14:21:53Z

← Older revision		Revision as of 14:21, 28 August 2019
Line 36:		Line 36:
	for NAME in $DIR/*		for NAME in $DIR/*
	do mv $NAME $NAME.txt		do mv $NAME $NAME.txt
			[[Category:Bash]]

Bacchas at 16:22, 8 March 2019

2019-03-08T16:22:12Z

← Older revision		Revision as of 16:22, 8 March 2019
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	ls –F /		ls –F /
	fi		fi
			==Case Construct ==

			==For Loop==
			#!/bin/bash
			echo –e "What directory has the files that you would like to rename? --> \c"
			read DIR
			for NAME in $DIR/*
			do mv $NAME $NAME.txt

Bacchas at 21:00, 7 March 2019

2019-03-07T21:00:13Z

← Older revision		Revision as of 21:00, 7 March 2019
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	or		or
	env		env
			[[File:Escape sequence.jpg\|thumb\|Escape Sequence]]
			[[File:Test Statements.jpg\|thumb\|Test Statements]]
	==Environmental Files==		==Environmental Files==
	Files that execute each time a user logs in to bash shell		Files that execute each time a user logs in to bash shell
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	The BASH runtime configuration files (/etc/bashrc and ~/.bashrc) are typically used to set aliases and variables that must be present in the BASH shell. They are executed immediately after a new login as well as when a new BASH shell is created after login. The /etc/bashrc file contains aliases and variables for all users on the system, whereas the ~/.bashrc file contains aliases and variables for a specific user. <br />		The BASH runtime configuration files (/etc/bashrc and ~/.bashrc) are typically used to set aliases and variables that must be present in the BASH shell. They are executed immediately after a new login as well as when a new BASH shell is created after login. The /etc/bashrc file contains aliases and variables for all users on the system, whereas the ~/.bashrc file contains aliases and variables for a specific user. <br />
	The other environment files are only executed after a new login. The /etc/profile file is exe- cuted after login for all users on the system and sets most environment variables, such as HOME and PATH. After /etc/profile finishes executing, the home directory of the user is searched for the hidden environment files. bash_profile, .bash_login, and .profile. If these files exist, the first one found is executed; as a result, only one of these files is typically used. These hidden environment files allow a user to set customized variables independent of BASH shells used by other users on the system; any values assigned to variables in these files override those set in /etc/profile, /etc/bashrc, and ~/.bashrc due to the order of execution		The other environment files are only executed after a new login. The /etc/profile file is exe- cuted after login for all users on the system and sets most environment variables, such as HOME and PATH. After /etc/profile finishes executing, the home directory of the user is searched for the hidden environment files. bash_profile, .bash_login, and .profile. If these files exist, the first one found is executed; as a result, only one of these files is typically used. These hidden environment files allow a user to set customized variables independent of BASH shells used by other users on the system; any values assigned to variables in these files override those set in /etc/profile, /etc/bashrc, and ~/.bashrc due to the order of execution
	~~[[File:Escape sequence.jpg\|thumb\|Escape Sequence]]~~
	==Structure of a bash Script==		==Structure of a bash Script==
	#!/bin/bash		#!/bin/bash
Line 27:		Line 28:
	ls –F /		ls –F /
	fi		fi


	~~[[File:Test Statements.jpg\|thumb\|Test Statements]]~~

Bacchas at 20:59, 7 March 2019

2019-03-07T20:59:31Z

← Older revision		Revision as of 20:59, 7 March 2019
Line 16:		Line 16:
	The BASH runtime configuration files (/etc/bashrc and ~/.bashrc) are typically used to set aliases and variables that must be present in the BASH shell. They are executed immediately after a new login as well as when a new BASH shell is created after login. The /etc/bashrc file contains aliases and variables for all users on the system, whereas the ~/.bashrc file contains aliases and variables for a specific user. <br />		The BASH runtime configuration files (/etc/bashrc and ~/.bashrc) are typically used to set aliases and variables that must be present in the BASH shell. They are executed immediately after a new login as well as when a new BASH shell is created after login. The /etc/bashrc file contains aliases and variables for all users on the system, whereas the ~/.bashrc file contains aliases and variables for a specific user. <br />
	The other environment files are only executed after a new login. The /etc/profile file is exe- cuted after login for all users on the system and sets most environment variables, such as HOME and PATH. After /etc/profile finishes executing, the home directory of the user is searched for the hidden environment files. bash_profile, .bash_login, and .profile. If these files exist, the first one found is executed; as a result, only one of these files is typically used. These hidden environment files allow a user to set customized variables independent of BASH shells used by other users on the system; any values assigned to variables in these files override those set in /etc/profile, /etc/bashrc, and ~/.bashrc due to the order of execution		The other environment files are only executed after a new login. The /etc/profile file is exe- cuted after login for all users on the system and sets most environment variables, such as HOME and PATH. After /etc/profile finishes executing, the home directory of the user is searched for the hidden environment files. bash_profile, .bash_login, and .profile. If these files exist, the first one found is executed; as a result, only one of these files is typically used. These hidden environment files allow a user to set customized variables independent of BASH shells used by other users on the system; any values assigned to variables in these files override those set in /etc/profile, /etc/bashrc, and ~/.bashrc due to the order of execution
			[[File:Escape sequence.jpg\|thumb\|Escape Sequence]]
	==Structure of a bash Script==		==Structure of a bash Script==
	#!/bin/bash		#!/bin/bash
Line 27:		Line 28:
	fi		fi

	~~[[File:Escape sequence.jpg\|thumb\|Escape Sequence]]~~
	[[File:Test Statements.jpg\|thumb\|Test Statements]]		[[File:Test Statements.jpg\|thumb\|Test Statements]]

Bacchas at 20:59, 7 March 2019

2019-03-07T20:59:07Z

← Older revision		Revision as of 20:59, 7 March 2019
Line 28:		Line 28:

	[[File:Escape sequence.jpg\|thumb\|Escape Sequence]]		[[File:Escape sequence.jpg\|thumb\|Escape Sequence]]
			[[File:Test Statements.jpg\|thumb\|Test Statements]]

Bacchas at 20:56, 7 March 2019

2019-03-07T20:56:22Z

← Older revision		Revision as of 20:56, 7 March 2019
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	The other environment files are only executed after a new login. The /etc/profile file is exe- cuted after login for all users on the system and sets most environment variables, such as HOME and PATH. After /etc/profile finishes executing, the home directory of the user is searched for the hidden environment files. bash_profile, .bash_login, and .profile. If these files exist, the first one found is executed; as a result, only one of these files is typically used. These hidden environment files allow a user to set customized variables independent of BASH shells used by other users on the system; any values assigned to variables in these files override those set in /etc/profile, /etc/bashrc, and ~/.bashrc due to the order of execution		The other environment files are only executed after a new login. The /etc/profile file is exe- cuted after login for all users on the system and sets most environment variables, such as HOME and PATH. After /etc/profile finishes executing, the home directory of the user is searched for the hidden environment files. bash_profile, .bash_login, and .profile. If these files exist, the first one found is executed; as a result, only one of these files is typically used. These hidden environment files allow a user to set customized variables independent of BASH shells used by other users on the system; any values assigned to variables in these files override those set in /etc/profile, /etc/bashrc, and ~/.bashrc due to the order of execution
	==Structure of a bash Script==		==Structure of a bash Script==
	#!/bin/bash		#!/bin/bash
			echo -e "Today’s date is: \c"
			date echo –e "\nThe people logged into the system include:"
			who
			echo –e "\nWould you like to see the contents of /?(y/n)--> \c"
			read ANSWER if [ $ANSWER = "y" ]
			then echo –e "\nThe contents of the / directory are:"
			ls –F /
			fi

	[[File:Escape sequence.jpg\|thumb\|Escape Sequence]]		[[File:Escape sequence.jpg\|thumb\|Escape Sequence]]

Bacchas at 20:44, 7 March 2019

2019-03-07T20:44:35Z

← Older revision		Revision as of 20:44, 7 March 2019
Line 16:		Line 16:
	The BASH runtime configuration files (/etc/bashrc and ~/.bashrc) are typically used to set aliases and variables that must be present in the BASH shell. They are executed immediately after a new login as well as when a new BASH shell is created after login. The /etc/bashrc file contains aliases and variables for all users on the system, whereas the ~/.bashrc file contains aliases and variables for a specific user. <br />		The BASH runtime configuration files (/etc/bashrc and ~/.bashrc) are typically used to set aliases and variables that must be present in the BASH shell. They are executed immediately after a new login as well as when a new BASH shell is created after login. The /etc/bashrc file contains aliases and variables for all users on the system, whereas the ~/.bashrc file contains aliases and variables for a specific user. <br />
	The other environment files are only executed after a new login. The /etc/profile file is exe- cuted after login for all users on the system and sets most environment variables, such as HOME and PATH. After /etc/profile finishes executing, the home directory of the user is searched for the hidden environment files. bash_profile, .bash_login, and .profile. If these files exist, the first one found is executed; as a result, only one of these files is typically used. These hidden environment files allow a user to set customized variables independent of BASH shells used by other users on the system; any values assigned to variables in these files override those set in /etc/profile, /etc/bashrc, and ~/.bashrc due to the order of execution		The other environment files are only executed after a new login. The /etc/profile file is exe- cuted after login for all users on the system and sets most environment variables, such as HOME and PATH. After /etc/profile finishes executing, the home directory of the user is searched for the hidden environment files. bash_profile, .bash_login, and .profile. If these files exist, the first one found is executed; as a result, only one of these files is typically used. These hidden environment files allow a user to set customized variables independent of BASH shells used by other users on the system; any values assigned to variables in these files override those set in /etc/profile, /etc/bashrc, and ~/.bashrc due to the order of execution
			==Structure of a bash Script==
			#!/bin/bash

			[[File:Escape sequence.jpg\|thumb\|Escape Sequence]]

Bacchas at 19:57, 7 March 2019

2019-03-07T19:57:42Z

← Older revision		Revision as of 19:57, 7 March 2019
Line 13:		Line 13:
	~/.bash_login		~/.bash_login
	~/.profile		~/.profile

	The BASH runtime configuration files (/etc/bashrc and ~/.bashrc) are typically used to set aliases and variables that must be present in the BASH shell. They are executed immediately after a new login as well as when a new BASH shell is created after login. The /etc/bashrc file contains aliases and variables for all users on the system, whereas the ~/.bashrc file contains aliases and variables for a specific user. <br />		The BASH runtime configuration files (/etc/bashrc and ~/.bashrc) are typically used to set aliases and variables that must be present in the BASH shell. They are executed immediately after a new login as well as when a new BASH shell is created after login. The /etc/bashrc file contains aliases and variables for all users on the system, whereas the ~/.bashrc file contains aliases and variables for a specific user. <br />
	The other environment files are only executed after a new login. The /etc/profile file is exe- cuted after login for all users on the system and sets most environment variables, such as HOME and PATH. After /etc/profile finishes executing, the home directory of the user is searched for the hidden environment files. bash_profile, .bash_login, and .profile. If these files exist, the first one found is executed; as a result, only one of these files is typically used. These hidden environment files allow a user to set customized variables independent of BASH shells used by other users on the system; any values assigned to variables in these files override those set in /etc/profile, /etc/bashrc, and ~/.bashrc due to the order of execution		The other environment files are only executed after a new login. The /etc/profile file is exe- cuted after login for all users on the system and sets most environment variables, such as HOME and PATH. After /etc/profile finishes executing, the home directory of the user is searched for the hidden environment files. bash_profile, .bash_login, and .profile. If these files exist, the first one found is executed; as a result, only one of these files is typically used. These hidden environment files allow a user to set customized variables independent of BASH shells used by other users on the system; any values assigned to variables in these files override those set in /etc/profile, /etc/bashrc, and ~/.bashrc due to the order of execution

Bacchas at 19:52, 7 March 2019

2019-03-07T19:52:39Z

← Older revision		Revision as of 19:52, 7 March 2019
Line 13:		Line 13:
	~/.bash_login		~/.bash_login
	~/.profile		~/.profile
			The BASH runtime configuration files (/etc/bashrc and ~/.bashrc) are typically used to set aliases and variables that must be present in the BASH shell. They are executed immediately after a new login as well as when a new BASH shell is created after login. The /etc/bashrc file contains aliases and variables for all users on the system, whereas the ~/.bashrc file contains aliases and variables for a specific user. <br />
			The other environment files are only executed after a new login. The /etc/profile file is exe- cuted after login for all users on the system and sets most environment variables, such as HOME and PATH. After /etc/profile finishes executing, the home directory of the user is searched for the hidden environment files. bash_profile, .bash_login, and .profile. If these files exist, the first one found is executed; as a result, only one of these files is typically used. These hidden environment files allow a user to set customized variables independent of BASH shells used by other users on the system; any values assigned to variables in these files override those set in /etc/profile, /etc/bashrc, and ~/.bashrc due to the order of execution

Bacchas at 19:47, 7 March 2019

2019-03-07T19:47:45Z

← Older revision		Revision as of 19:47, 7 March 2019
Line 4:		Line 4:
	or		or
	env		env

			==Environmental Files==
			Files that execute each time a user logs in to bash shell
			/etc/profile
			/etc/bashrc
			~/.bashrc
			~/.bash_profile
			~/.bash_login
			~/.profile