Linux Shell Script

exec & eval

Other shells

advance gawk

tac (reverse cat)

advance sed

RegExpr Examples

Regular Expression

sed

sed & gawk

Using Graphic UI

.dialogrc

ANSI Color Code

dialog Package

select

Shell Script based on Graphic

GNU shtool

Shell Library

Recursive function

Function Variables scope

Function

ssh-keygen

shell command in .bashrc

sendmail

at & crontab(anacron)

Background Mode & nohup & nice renice

sudoer

sudo -S

Linux expect

kill & trap

readCSV.sh

tee

Temporary file(mktemp)

alias

history

Linux Reserved Environment Variables

User FD Redirect & lsof

STD(in out err) Redirect

read

set -- in shell script

Options handling

shift

basename

Parameters($# $* $@ $? ...)

for untile while

case

Bracket expressions

[[ expression ]]

(( expression ))

if-then-elif-then-else

Mathematical Calculation

Pipe

wc

Redirect

echo

Shell Script

readlink -f

Text Editor

Package Management System, PMS

Linux Logical Volume Manager, LVM

Make File System & Check + Recovery

FS jargons

Linux file systems

SUID & SGID & Sticky bit

Linux File Authority

Linux File Authority [Group]

/etc/passwd & /etc/shadow fields

Linux File Authority [User]

array Variable

Bash Operating Files(Env Files)

$PATH

environment Variable

alias

history

Built-in Shell Commands & External Shell Commands

child shell(Sub Shell) & coproc

Data Compression & Data Archive

sort & grep

Disk space monitoring

ps & top

Hard Link & Soft Link

ls [-l & -l --time=atime]

file globbing

bash dictionary

Terminal Emulator & Virtual Terminal

setterm