#DevOps_tools

[mypavankumar-blog]

DevOps is a software development strategy which involves continuous development, continuous testing, continuous integration, and continuous monitoring of software through its development lifecycle.

[deepak-blog]

DevOps is a software development strategy which involves continuous development, continuous testing, continuous integration, and continuous monitoring of software through its development lifecycle.

[holytheoristtastemaker]

  Forget your bird, Love Linux

Click on playground and roll on your sleeves :c) -

playground

There are four types of the shell, we have in Linux-

Broune Shell -Sh shell

C Shell - csh or tcsh

Z shell -zsh

My Favorite - Bourne again shell -bash

To check shell type-

echo #SHELL

To print on the terminal

echo Hi from terminal !!

To view the current directory, display absolute path, means path from the root

pwd

To view all the files in a directory, -a will display hidden files as well

ls  ls -a

To change directory, it is case-sensitive, and you have to type in the name of the folder exactly as it is.

cd .. - To go back from a folder to the folder before that cd my_directory - to goto my_directory folder

When folder name has space e.g. my bird

cd my\ bird

Create a new directory

mkdir abhishek

When folder name has a space e.g. abhishek sharma

mkdir abhishek\ sharma

make directory hierarchy from one command

mkdir -p /dir_1/dir_2/dir_3/dir_4

Run multiple commands in a single line

cd abhishek\ sharma; mkdir devops_tools; ls

Create a file

touch file_1.txt

Write content in the file

cat > file_1.txt

write anything, write- "this is my first file in Linux" and type Ctrl+d to save

another way to do it

echo "this is my first file in linux" > file_1.txt

View content

cat file_1.txt

Remove directory and file commands

mkdir removable_dir rmdir removable_dir mkdir removable_dir cd removable_dir; touch removable_file.txt rmdir removable_dir  ---it gives you an error

Notes: only blank directories can be deleted with rmdir; to delete a directory, which has content in it, we will use rm -r

rm -r removable_dir

To delete a file

rm file_1.txt

Copy commands-

Copy a file to another file

cp {options} source_file target_file cp new_file.txt copy_file.txt

Copy File(s) to another directory or folder

cp {options} source_file target_directory  touch /dir_1/dir_2/file_4.txt cp -v /dir_1/dir_2/file_4.txt /dir_1/dir_2/dir_3/dir_4

Copy directory to directory

cp {options} source_directory target_directory

To copy a directory from one place to another use -r or -R option in cp command

cp -r /dir_1/dir_2/dir_3/dir_4 /dir_1/dir_2/

If the destination directory already has the same file, still you want to copy that file, to overwrite it use *-i*

cat > dir_1/dir_2/file_4.txt - this is me. press ctrl+d cp -i /dir_1/dir_2/file_4.txt /dir_1/dir_2/dir_3/dir_4

Move command- mv command to move the files one place to another

touch dir_1/dir_2/file_3.txt mv -v dir_1/dir_2/file_3.txt dir_1/dir_2/dir_3

Rename filename

touch latest.txt

want to change this file name latest to new

mv latest.txt new.txt rm latest.txt

Search something

locate new.txt

if you want to ignore the case

locate -i New.txt

if you want a file that has the word "this"

locate -i this

If you want the file(s) that has words "this" and "me"

locate -i *this*me

To view available disk space

df  above command will show disk space in KB, to view in MB use the following command df -m

To view disk usage by files

du

to view disk space used by a directory

du dir_1

To view Linux distro

uname  uname -a

Package manager apt-get

sudo apt-get update  sudo apt-get install nginx -y

To view your IP and name in host or network

hostname  hostname -I

To know your user account

whoami

To view user id, group id, group etc.

id

Download a file from a link

curl www.randomlink.com/downloadable-file.txt -O OR wget www.randomlink.com/downloadable-file.txt -O downloadable-file

Service start/stop/enable/disable/restart/status

systemctl status nginx systemctl restart nginx systemctl stop nginx systemctl status nginx systemctl start nginx  systemctl disable nginx systemctl enable nginx

To check connection to server

ping {ip address}  ping www.google.com

[ravicotocus]

Ansible Crash Course For Beginners | Ansible Tutorial | What Is Ansible?...

[ravicotocus]

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[ravicotocus]

Ansible Crash Course For Beginners | Ansible Tutorial | What Is Ansible?...

[ravicotocus]

Ansible Crash Course For Beginners | Ansible Tutorial | What Is Ansible?...