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BASH - Commands

File Transfer

	Command
Secure copy file to host	scp file.txt server2:/tmp
Synchronize source to destination	rsync -a /home/peter /backup/

	Command
Display your currently active processes	ps
Find all processes related to “telnet”	ps aef\|grep 'telnet'
Memory map of process	pmap
Display all running processes	top
Kill process with specific pid id	kill id
Kill all processes named xxx	kill xxx
Resumes suspended job without bringing them to the foreground	bg
Brings the most recent job to the foreground	fg
Bring job n to the foreground	fg n

	Command
Search for a pattern in files	grep pattern files
Search recursively for pattern in directory	grep -r pattern directory
Find all instances of file	locate filename
Find filenames that start with xxx	find /home/peter -name 'xxx*'
Find filesnames larger than 10000k	find /home/peter -size +10000k

	Command
Display who is logged in	w
Show who is logged into the system	who
Display who you are logged in as	whoami
Display information on a user	finger user
Show the active user id with login and group	id
Show last logins on the system	last
Add a group	groupadd groupname
Add a user	adduser peter
Add a user	useradd -c “Peter Roux” - g admin -m peter # Add user peter
Delete a user	userdel peter
Modify user information	usermod peter