COMMANDS	DESCRIPTION
`man`	read manual
`curl`
`ln`
`alias`
`sort -k2 test.txt`
`echo hahaha`	display text in console, from a console
`echo hahaha > file.txt`	overwrite text to a file
`echo hahaha >> file.txt`	append the text to the file
`cat A.txt`	display text in console, from a file
`cat A.txt B.txt`	combine text from multiple file in console
`cat A.txt B.txt > C.txt`	combine text from multiple file and write to a file
`cat > A.txt` `↵` hahaha `^`+`d`	write some text on terminal and create a file
`cat <<EOL>> A.txt` `↵` hahaha `↵` `EOL` `↵`	append text to file
`find -name test.txt`	for finding files
`find / -name test.txt`	for finding files and folders
`diff test1.txt test2.txt`
`uniq test.txt`	to find only unique lines
`history`
`touch hello.txt`	create a file
`# ls`	list command
`ls -ltr`
`ls -a`	list folders starting with .
`ls -l`	show list in detail
`ls -al`	`-a` & `-l` combined
`ll`	similar to `ls -l`
`cd myfolder`	Change Directory
`cd my-*`	Change Directory to folder starting from my
`mv file1.txt file2.txt`	Rename Files
`cp file1.txt ~/folder`	copy files
`mkdir myfolder`	make directory
`rmdir folder1`	remove empty directory
`rm -rf foldername`	remove directory with files (`-r` recursive, `-f` force)
`rm test.txt`	remove files
`locate -i redhouse*city`	search in whole OS
`pwd`	present working directory
`whoami`	username
`clear`	clear console
`dmesg`	for kernel logs
`more`	page by page increment order
`less`	page by page decrement order
`some_command_output \| more`	combine with other commands also

chmod

To check permissoin of a file or folder

ls -la

          ┌───────────┐ ┌───────────┐ ┌───────────┐
          │   USER    │ │   GROUP   │ │   OTHER   │
┌───────┐ ├───────────┤ ├───────────┤ ├───────────┤ ┌────────┐
│ chmod │ │     7     │ │     7     │ │     7     │ │ myfile │
└───────┘ ├───┬───┬───┤ ├───┬───┬───┤ ├───┬───┬───┤ └────────┘
          │ R │ W │ X │ │ R │ W │ X │ │ R │ W │ X │
          └───┴───┴───┘ └───┴───┴───┘ └───┴───┴───┘

Number	Permission	R+W+X	Commonly Used Numbers
0	– – –	0+0+0	REMOVE ALL PERMISSIONS
1	– – X	0+0+1
2	– W –	0+2+0
3	– W X	0+2+1
4	R – –	4+0+0	READ ONLY
5	R – X	4+0+1
6	R W –	4+2+0	READ + WRITE
7	R W X	4+2+1	READ + WRITE + EXECUTE

who

u User
g Group
o Other
a All (same as ugo)

chmod UGO yourfile
chmod 400 yourfile

permission

r Read
w Write
x Execute
- No Permission

operators

= set
+ add
- remove

$ chmod 777 filename
$ chmod u=rwx,g=rwx,o=rwx filename
$ chmod a=rwx filename

$ chmod 664 filename
$ chmod u=rw,g=rw,o=r filename
$ chmod a+rwx,u-x,g-x,o-wx filename

Folder -R for recursive

$ chmod -R 777 foldername

`grep`

grep -in "my-regex-here" filename.txt

i IgnoreCase
n LineNumber
r Recursive
l ListFilenamesOnly

grep "my-regex-here" filename.txt single file
grep "my-regex-here" * all files in current directory
grep -r "my-regex-here" ./dir1 recursive search inside directory
grep -r "my-regex-here" ./dir1 ./dir2 ./dir3 recursive search inside multiple directories
grep -r "my-regex-here" ./dir1 > output.txt print result in separate file

It can be combined with other commands, like ls | grep "html"

Archive Compression formats

tar archive format (does not compress)
gzip low compression
bzip2 medium compression
xz high compression

Compress single file

zip video.mp4
gzip video.mp4
bzip2 video.mp4

Extract

unzip archive.zip
gunzip archive.gzip
bunzip2 archive.bz2
gunzip archive.xz

Archive & Compression Extensions

.gz (gzip) [DEFLATE]
.bz (bzip)
.bz2 (bzip2) [Burrows–Wheeler]
.xz (xz) [LZMA]
.tar (tar)
.tar.gz (tar + gzip)
.tar.bz (tar + bzip)
.tar.bz2 (tar + bzip2)
.tar.xz (tar + xz)
.tgz (tar + gzip)
.tbz (tar + bzip)
.tbz2 (tar + bzip2)
.txz (tar + xz)

`tar -options`

tar -c : Creates Archive
tar -x : Extract the archive
tar -v : Displays Verbose Information
tar -f : creates archive with given filename
tar -t : displays or lists files in archived file
tar -u : archives and adds to an existing archive file
tar -A : Concatenates the archive files
tar -W : Verify a archive file
tar -r : update or add file or directory in already existed .tar file
tar -z : gzip
tar -j : bzip2
tar -J : xz

Examples

Create archive without compression
- tar -cvf archive.tar /myfolder/A
Create archive of only .txt files
- tar -cvf archive.tar *.txt
Create gzip archive from multiple paths, excluding specifics
- tar -czvf archive.tar.gz /myfolder/A /myfolder/B /myfolder/C --exclude=/myfolder/A/temp --exclude=*.mp4
Extract .tar archive
- tar -xvf archive.tar -C /pathtoextract
Extract .tar.gz archive
- tar -xzvf archive.tar.gz -C /pathtoextract
Extract .tar.bz2 archive
- tar -xjvf archive.tar.bz2 -C /pathtoextract

Terminal

echo $0 to check what kind of terminal it is zsh, bash
echo $SHELL to get the path of the termial (not sure) bin/zsh

Terminal Color

value	name
0	Reset: turn off all attributes
1	Bold (or bright, it’s up to the terminal and the user config to some extent)
3	Italic
4	Underline
30–37	Set text colour from the basic colour palette of 0–7
38;5;n	Set text colour to index n in a 256-colour palette (e.g. \x1b[38;5;34m)
38;2;r;g;b	Set text colour to an RGB value (e.g. \x1b[38;2;255;255;0m)
40–47	Set background colour
48;5;n	Set background colour to index n in a 256-colour palette
48;2;r;g;b	Set background colour to an RGB value
90–97	Set text colour from the bright colour palette of 0–7
100–107	Set background colour from the bright colour palette of 0–7

Extra detailed table (expand)

Code	Effect	Note
0	Reset / Normal	all attributes off
1	Bold or increased intensity
2	Faint (decreased intensity)	Not widely supported.
3	Italic	Not widely supported. Sometimes treated as inverse.
4	Underline
5	Slow Blink	less than 150 per minute
6	Rapid Blink	MS-DOS ANSI.SYS; 150+ per minute; not widely supported
7	[[reverse video]]	swap foreground and background colors
8	Conceal	Not widely supported.
9	Crossed-out	Characters legible, but marked for deletion. Not widely supported.
10	Primary(default) font
11–19	Alternate font	Select alternate font n-10
20	Fraktur	hardly ever supported
21	Bold off or Double Underline	Bold off not widely supported; double underline hardly ever supported.
22	Normal color or intensity	Neither bold nor faint
23	Not italic, not Fraktur
24	Underline off	Not singly or doubly underlined
25	Blink off
27	Inverse off
28	Reveal	conceal off
29	Not crossed out
30–37	Set foreground color	See color table below
38	Set foreground color	Next arguments are 5;<n> or 2;<r>;<g>;<b>, see below
39	Default foreground color	implementation defined (according to standard)
40–47	Set background color	See color table below
48	Set background color	Next arguments are 5;<n> or 2;<r>;<g>;<b>, see below
49	Default background color	implementation defined (according to standard)
51	Framed
52	Encircled
53	Overlined
54	Not framed or encircled
55	Not overlined
60	ideogram underline	hardly ever supported
61	ideogram double underline	hardly ever supported
62	ideogram overline	hardly ever supported
63	ideogram double overline	hardly ever supported
64	ideogram stress marking	hardly ever supported
65	ideogram attributes off	reset the effects of all of 60-64
90–97	Set bright foreground color	aixterm (not in standard)
100–107	Set bright background color	aixterm (not in standard)

All console.log(colors) (expand)

console.log(`\x1b[${0}mXXXXXXXXX\x1b[0m`, "0=default");
console.log(`\x1b[${1}mXXXXXXXXX\x1b[0m`, "1=bold");
console.log(`\x1b[${2}mXXXXXXXXX\x1b[0m`, "2=dull");
console.log(`\x1b[${3}mXXXXXXXXX\x1b[0m`, "3=italic");
console.log(`\x1b[${4}mXXXXXXXXX\x1b[0m`, "4=underline");
console.log(`\x1b[${5}mXXXXXXXXX\x1b[0m`, "5=blink, tested in mac terminal");
console.log(`\x1b[${7}mXXXXXXXXX\x1b[0m`, "7=inverse");
console.log(`\x1b[${8}mXXXXXXXXX\x1b[0m`, "8=transparent");
console.log(`\x1b[${9}mXXXXXXXXX\x1b[0m`, "9=striked-off, tested in node");
console.log(`\x1b[${21}mXXXXXXXXX\x1b[0m`, "21=underline, tested in node");
console.log(`\x1b[${30}mXXXXXXXXX\x1b[0m`, "30=fg-darker");
console.log(`\x1b[${31}mXXXXXXXXX\x1b[0m`, "31=fg-red");
console.log(`\x1b[${32}mXXXXXXXXX\x1b[0m`, "32=fg-green");
console.log(`\x1b[${33}mXXXXXXXXX\x1b[0m`, "33=fg-yellow/golden");
console.log(`\x1b[${34}mXXXXXXXXX\x1b[0m`, "34=fg-blue/purple");
console.log(`\x1b[${35}mXXXXXXXXX\x1b[0m`, "35=fg-magenta/pink");
console.log(`\x1b[${36}mXXXXXXXXX\x1b[0m`, "36=fg-turqoise/aqua");
console.log(`\x1b[${37}mXXXXXXXXX\x1b[0m`, "37=fg-white/gray");
console.log(`\x1b[${40}mXXXXXXXXX\x1b[0m`, "40=bg-black");
console.log(`\x1b[${41}mXXXXXXXXX\x1b[0m`, "41=bg-red");
console.log(`\x1b[${42}mXXXXXXXXX\x1b[0m`, "42=bg-green");
console.log(`\x1b[${43}mXXXXXXXXX\x1b[0m`, "43=bg-yellow/golden");
console.log(`\x1b[${44}mXXXXXXXXX\x1b[0m`, "44=bg-blue/purple");
console.log(`\x1b[${45}mXXXXXXXXX\x1b[0m`, "45=bg-magenta/pink");
console.log(`\x1b[${46}mXXXXXXXXX\x1b[0m`, "46=bg-turqoise/aqua");
console.log(`\x1b[${47}mXXXXXXXXX\x1b[0m`, "47=bg-white/gray");
console.log(`\x1b[${90}mXXXXXXXXX\x1b[0m`, "90=fg-bright-darker");
console.log(`\x1b[${91}mXXXXXXXXX\x1b[0m`, "91=fg-bright-red");
console.log(`\x1b[${92}mXXXXXXXXX\x1b[0m`, "92=fg-bright-green");
console.log(`\x1b[${93}mXXXXXXXXX\x1b[0m`, "93=fg-bright-yellow/golden");
console.log(`\x1b[${94}mXXXXXXXXX\x1b[0m`, "94=fg-bright-blue/purple");
console.log(`\x1b[${95}mXXXXXXXXX\x1b[0m`, "95=fg-bright-magenta/pink");
console.log(`\x1b[${96}mXXXXXXXXX\x1b[0m`, "96=fg-bright-turqoise/aqua");
console.log(`\x1b[${97}mXXXXXXXXX\x1b[0m`, "97=fg-bright-white/gray");
console.log(`\x1b[${100}mXXXXXXXXX\x1b[0m`, "100=bg-bright-gray");
console.log(`\x1b[${101}mXXXXXXXXX\x1b[0m`, "101=bg-bright-red");
console.log(`\x1b[${102}mXXXXXXXXX\x1b[0m`, "102=bg-bright-green");
console.log(`\x1b[${103}mXXXXXXXXX\x1b[0m`, "103=bg-bright-yellow/golden");
console.log(`\x1b[${104}mXXXXXXXXX\x1b[0m`, "104=bg-bright-blue/purple");
console.log(`\x1b[${105}mXXXXXXXXX\x1b[0m`, "105=bg-bright-magenta/pink");
console.log(`\x1b[${106}mXXXXXXXXX\x1b[0m`, "106=bg-bright-turqoise/aqua");
console.log(`\x1b[${107}mXXXXXXXXX\x1b[0m`, "107=bg-bright-white/gray");

Greyish...

console.log(7, `\x1b[${7}mXXXXXXXXX\x1b[0m`);
console.log(47, `\x1b[${47}mXXXXXXXXX\x1b[0m`);
console.log(107, `\x1b[${107}mXXXXXXXXX\x1b[0m`);

Loop

for (let i = 0; i < 150; i++) {
    console.log(i, `\x1b[${i}mXXXXXXXXX\x1b[0m`);
}

\e or \x1b or \033
\e[0m Reset to default
https://ss64.com/nt/syntax-ansi.html
https://stackoverflow.com/questions/4842424/list-of-ansi-color-escape-sequences
https://www.lihaoyi.com/post/BuildyourownCommandLinewithANSIescapecodes.html

Websites

POSIX

A set of standard operating system interfaces based on the Unix operating system

POSIX compliant OS (ie: LINIX, MINIX, QNX, etc)

tushar8133 / main-linux Goto Github PK

main-linux's Introduction

chmod

who

permission

operators

grep

Archive Compression formats

Compress single file

Extract

Archive & Compression Extensions

tar -options

Examples

Terminal

Terminal Color

Websites

POSIX

main-linux's People

Contributors

Watchers

Recommend Projects

Recommend Topics

Recommend Org

`grep`

`tar -options`