Linux command guide - Revision history

WarnerGouin at 21:51, 15 December 2010

2010-12-15T21:51:04Z

WarnerGouin at 21:41, 15 December 2010

2010-12-15T21:41:29Z

← Older revision		Revision as of 21:41, 15 December 2010
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			== Getting Help ==

	== 1. Getting Help ==

	man <command> – Display command help		man <command> – Display command help
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	== 2. Directory navigation, basic shell tasks, and File Management ==		== Directory navigation, basic shell tasks, and File Management ==

	cd – Change working directory		cd – Change working directory
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	history – Records commands typed at command prompt		history – Records commands typed at command prompt

	Ctrl+R to begin a backward search through history		Ctrl+R to begin a backward search through history

	Ctrl+S to search forward through history		Ctrl+S to search forward through history

	Up Arrow and Down Arrow to move a line at a time through history		Up Arrow and Down Arrow to move a line at a time through history

	mkdir ch1 – Creates new directory ch1		mkdir ch1 – Creates new directory ch1
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	== 3. Redirection and piping ==		== Redirection and piping ==

	ls > List-of-files.txt – Write list of files in current working directory to the file, List-of-files.txt		ls > List-of-files.txt – Write list of files in current working directory to the file, List-of-files.txt
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	== 4. Text processing commands ==		== Text processing commands ==

	cat – Concatenate files together		cat – Concatenate files together
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	== 5. Package Management ==		== Package Management ==

	rpm Utility		rpm Utility

	rpm -q zsh – Check if RPM package zsh (z shell) is installed		rpm -q zsh – Check if RPM package zsh (z shell) is installed

	rpm -i zsh-4.3.9-4.fc11.i586.rpm – Installs the zsh RPM package		rpm -i zsh-4.3.9-4.fc11.i586.rpm – Installs the zsh RPM package

	remove zsh: rpm -e zsh – Uninstalls the zsh RPM package		remove zsh: rpm -e zsh – Uninstalls the zsh RPM package

	yum Utility		yum Utility

	yum install zsh – Downloads and installs zsh package		yum install zsh – Downloads and installs zsh package

	apt-get Utility		apt-get Utility

	sudo apt-get install alien – Downloads and installs the program “alien”		sudo apt-get install alien – Downloads and installs the program “alien”

	sudo apt-get install chkconfig – Downloads and installs the program “chkconfig”		sudo apt-get install chkconfig – Downloads and installs the program “chkconfig”

	sudo apt-get remove package – Remove package		sudo apt-get remove package – Remove package

	apt-get autoremove – Removes additional programs associated with the main package installation		apt-get autoremove – Removes additional programs associated with the main package installation


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	== 6. Useful Management Commands ==		== Useful Management Commands ==

	ps aux –		ps aux –
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	== 7. Useful Configuration Files ==		== Useful Configuration Files ==

	Shell Configuration files		Shell Configuration files

	Per user configuration files		Per user configuration files

	~/.bashrc		~/.bashrc

	~/.profile		~/.profile

	Global configuration files		Global configuration files

	/etc/bash.bashrc		/etc/bash.bashrc

	/etc/profile		/etc/profile

WarnerGouin at 21:33, 15 December 2010

2010-12-15T21:33:44Z

← Older revision		Revision as of 21:33, 15 December 2010
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	~~== Contents ==~~


	~~1. Getting Help~~

	~~2. Directory Navigation, basic shell tasks, and File Management~~

	~~3. Redirection and Piping~~

	~~4. Text Processing~~

	~~5. Package Management~~

	~~6. Useful Management Commands~~

	~~7. Useful Configuration Files~~

WarnerGouin at 21:33, 15 December 2010

2010-12-15T21:33:07Z

← Older revision		Revision as of 21:33, 15 December 2010
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	1. Getting Help
			== 1. Getting Help ==

	man <command> – Display command help		man <command> – Display command help
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	2. Directory navigation, basic shell tasks, and File Management
			== 2. Directory navigation, basic shell tasks, and File Management ==

	cd – Change working directory		cd – Change working directory
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	~~3. Redirection and piping~~

			== 3. Redirection and piping ==

	ls > List-of-files.txt – Write list of files in current working directory to the file, List-of-files.txt		ls > List-of-files.txt – Write list of files in current working directory to the file, List-of-files.txt

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	~~4. Text processing commands~~

			== 4. Text processing commands ==

	cat – Concatenate files together		cat – Concatenate files together

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	5. Package Management
			== 5. Package Management ==

	rpm Utility		rpm Utility
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	6. Useful Management Commands
			== 6. Useful Management Commands ==

	ps aux –		ps aux –
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	7. Useful Configuration Files
			== 7. Useful Configuration Files ==

	Shell Configuration files		Shell Configuration files

WarnerGouin at 21:31, 15 December 2010

2010-12-15T21:31:31Z

← Older revision		Revision as of 21:31, 15 December 2010
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	Contents		== Contents ==


	1. Getting Help		1. Getting Help

WarnerGouin at 21:30, 15 December 2010

2010-12-15T21:30:49Z

← Older revision		Revision as of 21:30, 15 December 2010
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			Contents

	~~'''== Contents =='''~~
	1. Getting Help		1. Getting Help

WarnerGouin at 21:30, 15 December 2010

2010-12-15T21:30:11Z

← Older revision		Revision as of 21:30, 15 December 2010
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	~~Contents~~

			'''== Contents =='''
	1. Getting Help		1. Getting Help

WarnerGouin at 21:29, 15 December 2010

2010-12-15T21:29:05Z

Show changes

WarnerGouin: Created page with 'Contents 1. Getting Help 2. Directory Navigation, basic shell tasks, and File Management 3. Redirection and Piping 4. Text Processing 5. Package Management 6. Useful Management C…'

2010-12-15T21:23:52Z

Created page with 'Contents 1. Getting Help 2. Directory Navigation, basic shell tasks, and File Management 3. Redirection and Piping 4. Text Processing 5. Package Management 6. Useful Management C…'

New page

Contents
1. Getting Help
2. Directory Navigation, basic shell tasks, and File Management
3. Redirection and Piping
4. Text Processing
5. Package Management
6. Useful Management Commands
7. Useful Configuration Files

1. Getting Help
man <command> – Display command help
man find | grep <search string> – Locate specific help text within the manual
info – Provide man help in a different format

2. Directory navigation, basic shell tasks, and File Management
cd – Change working directory
cd .. – Change to parent directory
cd ~ – Change to home working directory
pwd – Display working directory
echo <line of text> – Display the line of text (useful for user friendly scripting)
echo $PATH – Display assignment to the environmental variable
time <command> - Time how long <command> took to execute
ls – Lists files in the current working directory
ls -a – Shows hidden files (hidden files start with a dot) as part of file listing
ls -l – Shows file detail
ls –F – Shows File type as part of file listing
history – Records commands typed at command prompt
Ctrl+R to begin a backward search through history
Ctrl+S to search forward through history
Up Arrow and Down Arrow to move a line at a time through history
mkdir ch1 – Creates new directory ch1
mv file1 file2 – Moves file file1 to file2, renames file1 to file2
mv testfile changedfile
less – View file contents page-by-page
unset MYNAME – Removes the environment variable assignment assigned to MYNAME
exit – Terminate shell
cp -R one newone – Copies directory /one recursively to a new directory named /newone
rm etcbackup.tar.gz – Deletes file

3. Redirection and piping
ls > List-of-files.txt – Write list of files in current working directory to the file, List-of-files.txt
pwd >> List-of-files.txt – Append current working directory to the file “List-of-files.txt”
ps ax | grep string – Pipe output of ps ax to grep which searches for string.

4. Text processing commands
cat – Concatenate files together
cat /proc/interrupts – Display information from interrupts file (querying kernel about interrupts)
join – Merge file data from multiple files
sort – Sort file contents
nl – Generate line numbers for each line in a file
tail -20 /var/log/syslog – View last 20 entries posted to syslog file
less – File paging utility
grep string /var/log/* – Search for all occurrences of string in all log files in /var/log directory

5. Package Management
rpm Utility
rpm -q zsh – Check if RPM package zsh (z shell) is installed
rpm -i zsh-4.3.9-4.fc11.i586.rpm – Installs the zsh RPM package
remove zsh: rpm -e zsh – Uninstalls the zsh RPM package
yum Utility
yum install zsh – Downloads and installs zsh package
apt-get Utility
sudo apt-get install alien – Downloads and installs the program “alien”
sudo apt-get install chkconfig – Downloads and installs the program “chkconfig”
sudo apt-get remove package – Remove package
apt-get autoremove – Removes additional programs associated with the main package installation

ldd /bin/ls – Display information about libraries used by the ls program

6. Useful Management Commands
ps aux –
top –
kill pid – Send kill signal to process (pid)
jobs – List all currently running jobs
dmesg | less –
dmesg | grep sdb –
tar -czf BackupFileneme.tar.gz /Folder – Backup a the /Folder and all the files it contains into a single gzipped, tar file (BackupFilename)
tar -xvfz BackupFileneme.tar.gz – Extract the gzipped, tar file (BackupFilename) to some other location on a hard drive
find / -perm +6000 -type f > SUID-GUID-bits-Set.txt – Search system for all SUID/GUID files

7. Useful Configuration Files
Shell Configuration files
Per user configuration files
~/.bashrc
~/.profile
Global configuration files
/etc/bash.bashrc
/etc/profile