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Red hat linux basic commands

 


Introduction command line frombasic
working with iles in linux
viewing and editing file in linux
types command in linux
wildcaeds and alias in linux

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#cal      =shwo calendar
#cal -y     = all year calendar
#cal 2019   = year dat show spacify year and date

#cal 1 2022        =jan month 2020 shwo date
#cal -3            = All three month
#clear                =all clear treminal commands

=================================

# pwd       = print working directory  shwo courant directory
#ls         = show courant directory in files and directory (folder)
#cd         = change directory
#cd  ./Desktop            =relative path
#cd  /Desktop             =apslutpath

=================
inode      :- All informaction

===========================
#ls -i               =inode number show
#ln original   shortcutfile               =create file shortcut hard link all file

use any file delete to other ile access ok

#ln -s   original shortcut1          =softlink shortcut link create man file delete

to all softlink file not use



=======================
LOOP
#ln -s
#ln -s  ..  c         loop creat

==========
#ls -l          =all permission list
#ls -a          = all show hidden file
#ls -t          = time base list show file
#ls -r          = alabatic reverse show file
#ls -R dir1     = show all receshive file show path
#ls -l -i
#ls -li
#ls -ali         = to us any type to command fire

===========================================

File in linux
#touch b       =re use file this command to change time statment change
#touch filez    = create new file

#rmdir e        = directory remove mt dir only
#rm filename     =
#rm -R dir1       = all dir del
#rm -i file       = permissin to yes or no
#rm -Ri dir1      = yes or no all in dir permission
#rm -f  dir1      = forcefully delete
#rm -v            = witch hie delete show

#cp -i file1 file2 dir1      =copyboth file 1 or 2 in dir1
#mv file1 txt1
#mv visible .hide       = this file hide to first . to hide file

#mv abc.txt abc.pdf   = you change extance to not change file type same file open

img video not change file txt to pdf
#file linux           =extension show  img video  like

#mkdir 'my name'      =to create space directory name
#mkdir  my\ name      = to user \ to set name space set
#mkdir  my\ name\ pra   = name save   my name pra  sae this file name

#mkdir \$name           =create special character use
#mkdir \"mycate\"       = to name save "mycate" save this file
#mkdir \$\$dir          = $$dir
              \use special creatr

================================
Shotcut key

ctrl + A       = first line
ctrl + E       = line last curse
ctrl + F    =forword one word carator
ctrl + B    =forword behind word

alt + F        = one word scape
alt + B        = one word behind

alt + U     =behind word case upercas
alt + L        =Lower case

ctrl + X    =cut word
ctrl + y    = past word
ctrl + U     = cut backword
ctrl + y    =past word

ctrl + L     =clear to cmd terminal
====================================


viewing and editing file in linux

#gedit  text           = open and edit
                       =  create new file and save

=
nano
#nano text.txt

#history    =show all command show past

Delta        #ls -l
root dir in
#gedit .bashhistory    = shwo all all history shwo in file

#history 10     =last 10 commands show history
#history -c     = clear all history

=======================
#less commands
#less shortcuts            =search
#cat shortcuts txt1        = show both file in terminal
#tac txt1          =revers start file line 321 like

==========
you use c or c++ loop and etc use in linux : pradhyuman
#for ((i=1;1<=1000;i++)); do echo $i >> thousand; done

this command to thousand file in create 1 to 1000 number

#head thousand        =starting 10 line show
#head -n 20         =show 20 line first

#tail thousand        =last to 10 line show
#tail -n 25 thousand    =last 25 line print to show

#wc thoudand      =show result
        = 1000    1000    2920    thousand
          line    word    bites    file name


#wc -l commands        =line count
#wc -w commands     =word count
#wc -c commands     =carator bits
#wc -L commands        = largest one file show bite count


===============
#cal ; date ; mkdir file1          =you fire all commands in one line like this

this commands firest wrong commands to next commands work check one by one

cm1 && cm2 &&..........     =formula
#cal && date             =show both commands this commands firest wrong commands to

all commands not use



=========================================
1 bin user/bin     user shall screep
shell builting commands
alias            shell scrpit              :pra

=================
#type cd              shell builth  help only use
#ls --color=auto
#ls --color=no         = no clour file list show

#file /bin/bzdiff    -F
#type bzexe

=============
#which date   =show path which path to run command
#which ls

===
#help
#help  cd, type , cal

#man cp , mv , ls

===========
#whatis cp ,mv      =informaction to commands : pradhyuman

===================
wild cards is a symbol that represents one or more characters

 * ? = ?            *;
only crator

#cp * dir        =copy all file1 2 3 copy
#cp n*e dir      =first later n or last word e only this file copy
#cp file?.txt dir
       ?9
       9?        =same copy

#cp f?L*.txt dir    =all file1 2 copy


===
#cp [abc]* dir       = all file to name star a,b,c all file copy
#cp [!abc]* dir      = this commands use to a,b,c other name file copy


#cp [1-9]* dir       = all number to stat 0 to 9 fill name copy
#cp [[:lower:]]* dir      = copy all lower case name to start copy
#cp [[:upper:]]* dir      = all file name start upper case to copy
#cp [[:digit:]]* dir      = all file in start nuber to copy
#cp [[:alpha:]]* dir      = any type of word lower ya upper both copy
#cp [[:alnum:]]* dir      = all file copy name number both


=======================
#type  (any name)  not find name to alias you creat

what is alias  ?
An alias is a (usually short) name that the shell translates into another (usually longer) name or command. Aliases allow you to define new commands by substituting a string for the first token of a simple command.


alias = you use any name to crate (type to check not use any ore place this word) then you use any big commands & big name to spcify to only perticuler word in store commands ya name : pradhyuman ghodela



sientex = alias (name="....")

#alias shortcut="cd Desktop; mkdir dir1; touch file1; date; cal"     = to store in shortcut name in store this all commands store
to user any time to user only
#shortcut                 =and word all command run


#alias open="gedit -/Desktop/word/file/todo/list"

to set auto go this dir only fire this commands and go thisdir

#open

#rename file windows       =you change file name pradhyuman ghodela

===========

#alias  = show all create alias in list
to save all alias in all time to edit file and use any time
 

root dir in #ls -a
to show all file hide and non hide

#gedit .bashrc

edit this file number line 91 94  change and set your alias commands save and use

to check your alias in save this file
#alias

to check all alias in this commands to use any time ok

========================best of luck =========================================






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