- Shuffle
Toggle OnToggle Off
- Alphabetize
Toggle OnToggle Off
- Front First
Toggle OnToggle Off
- Both Sides
Toggle OnToggle Off
Front
How to study your flashcards.
Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key
Up/Down arrow keys: Flip the card between the front and back.down keyup key
H key: Show hint (3rd side).h key
PLAY BUTTON
PLAY BUTTON
26 Cards in this Set
- Front
- Back
|
shell
|
a program that allows you to communicate directly with the operating system kernel / BOURNE / BOURNE AGAIN / KORN / C / TC
|
|
login shell
|
started whenever a user logs in to the system
|
|
non-login shells
|
any shell started from within a running shell / only the ~/.bashrc file is read when this shell is started
|
|
history
|
bash stores the commands you enter / the commands are written to the file .bash_history / can have 1000 entries / use up and down arrow keys
|
|
su
|
use su - used for entering as root
|
|
sux
|
allows you to run graphical operations
|
|
id
|
Use this to seeyour PID
|
|
whoami
|
use to see who are logged in as
|
|
exit
|
allows you leave the admisinstrator shell
|
|
shell variable
|
they control the behavior of the shell itself and are only relevant locally for the currently active shell / examples: PS1 and UID / use EXPORT command to turn to environment variable
|
|
environment variable
|
They have larger scope and also influence any other programs started from within the current shell / examples: PATH, HOME, USER
|
|
echo
|
prints out everything after the command 'echo'
|
|
alias
|
defining aliases allow you to create shortcuts for commands and their options or to create commands with entirely different names /
|
|
type
|
used to see whether a given command is an alias for something else
|
|
define alias
|
alias alias_name='command options'
|
|
search patterns
|
special characters that may be used to match multiple filenames, also know as wild cards / regular expressions
|
|
linux standard data channels
|
0 - standard input / 1 - standard output / 2 - standard error output
|
|
piping
|
These are the standard input or output for processes, tasks, and functions
|
|
redirection
|
< redirects standard input / > redirects standard output or 1> / 2> redirects standard error output
|
|
tee
|
used to copy data from standard input to both standard output and a specified file
|
|
&&
|
a special operator that executes the command on the right side if the command on the left side exited with a zero exit status
|
|
||
|
A special operator that executes the command on the right side if the command on the left side exited with a nonzero exit status
|
|
vi
|
i- inserts / most common editor on Linux and UNIX
|
|
editors
|
vi, emacs, xemacs, joe, e3, pico,
|
|
sed
|
program that is a stream editor - an editor used from the command line rather than interactively / performs text transforms on a line-by-line basis
|
|
awk
|
got name from creators / used to search for and display text using a variety of different formatting options / awk procedure is an indefinite loop / 3 parts - before, during, after
|
