Please follow and complete the free online Command Line Crash Course tutorial. This is a great, quick tutorial. Each "chapter" focuses on a command. Type the commands you see in the Do This section, and read the You Learned This section. Move on to the next chapter. You should be able to go through these in a couple of hours.
###Q1. Cheat Sheet of Commands
Make a cheat sheet for yourself: a list of at least ten commands and what they do, focused on things that are new, interesting, or otherwise worth remembering.
grep: search for a specific string within a file find: looks for a file pwd: print working directory, tell you where you are mkdir: make a new directory cd: change directory ls: list everything within current directory rmdir: remove directory pushd: takes current directory and pushes into a list for later, then changes to another directory ("save where i am and go to this new place") popd: takes last directory you pushed and "pops" it off, taking you back to where you were touch: makes an empty file cp: copy a file mv: moves a file less: displays a file within the terminal, need to press 'q' to exit file display cat: streams a file, no paging or stopping required rm: remove a file pipes: | command on left is piped to command on right < : send input from file on right to program on the left
: takes output of command on left and writes to file on the right
: takes output of command on left, appends it to file on right wildcard matching: use * to say 'anything' man: will find information on command apropos: will try to find relevant commands/info if you dont know the command sudo: the magic word! runs a command with elevated privelages, requires a user password chmod: "change mode" will change the permissions of files or directories chown: "change ownder" will change the ownder and group of files, directories and links
###Q2. List Files in Unix
What do the following commands do:
ls
ls -a
ls -l
ls -lh
ls -lah
ls -t
ls -Glp
'ls' will list the contents of a directory.
'ls -a' will list the contents including hidden files. 'ls -l' will list the contents of the directory in longform. This includes details such as filename, permissions, file owner, date, etc. 'ls -lh' will list content sizes in long form. 'ls -la' will list the long form of hidden files. 'ls -lah' will list the size in the long form of all files, including hidden.
###Q3. More List Files in Unix
Explore these other ls options and pick 5 of your favorites:
REPLACE THIS TEXT WITH YOUR RESPONSE
###Q4. Xargs
What does xargs do? Give an example of how to use it.
'xargs' is used to build and execute command lines from standard input. It can be used to remove or do some operation on a long list of file names which were produced by using the find and/or grep commands. Example: find ./documents -print | xargs grep "data" Will find files in the documents folder, pipe thorugh to the grep command > > to look for files with the word "data" within them.