Q: What is Linux?
Linux is a family of free and open-source operating systems based on the Linux kernel. Operating systems based on Linux are known as Linux distributions, or distros. Examples include Debian, Ubuntu, Fedora, CentOS, Gentoo, Arch Linux, and many others.
The Linux operating system's architecture mainly contains the following components: the kernel, system library, hardware layer, system, and shell utility.
Basic Linux Commands:
ls - > List all directories/files
ls -a -> List all files along with hidden files
ls -R -> shows all files in a subdirectory
cd ->for changing the directory
cat -> It can be used to create a file, display the content of the file, copy the content of one file to another file, and more.
touch-> for creating empty files
mkdir -> to make a new directory
cp -> To copy files
mv -> to move files around
rm -> to remove files
Directory commands
pwd--> print work directory. Gives the present working directory.
cd path_to_directory--> Change the directory to the provided path
cd--> change directory to the home directory
cd - --> Go to the last working directory.
cd .. --> change directory to one step back.
cd ../.. --> Change directory to 2 levels back.
mkdir directoryName --> to make a directory in a specific location
Tasks:
To view what is written in file
Arunima@DESKTOP-JETUU7R MINGW64 /e/devops-handson/90days/day3 (master)
$ echo "Learning devops.." >task.txt
Arunima@DESKTOP-JETUU7R MINGW64 /e/devops-handson/90days/day3 (master)
$ cat task.txt
Learning devops..
To change the access permissions of files.
Arunima@DESKTOP-JETUU7R MINGW64 /e/devops-handson/90days/day3 (master)
$ ls -l task.txt
-rw-r--r-- 1 Arunima 197121 18 Apr 10 16:21 task.txt
Arunima@DESKTOP-JETUU7R MINGW64 /e/devops-handson/90days/day3 (master)
$ chmod 765 task.txt
Arunima@DESKTOP-JETUU7R MINGW64 /e/devops-handson/90days/day3 (master)
$ ls -l task.txt
-rw-r--r-- 1 Arunima 197121 18 Apr 10 16:21 task.txt
3)To check which commands you have run till now.
Arunima@DESKTOP-JETUU7R MINGW64 /e/devops-handson/90days/day3 (master)
$ history
..
167 mkdir day3
168 cd day3
169 echo "Learning devops.." >task.txt
170 cat task.txt
171 ls -l task.txt
172*
173 ls -l task.txt
174 chmod 765 task.txt
175 ls -l task.txt
176 chmod 777 task.txt
177 history
4)To remove a directory/ Folder.
Arunima@DESKTOP-JETUU7R MINGW64 /e/devops-handson/90days/day3 (master)
$ mkdir random
Arunima@DESKTOP-JETUU7R MINGW64 /e/devops-handson/90days/day3 (master)
$ ls
random/ task.txt
Arunima@DESKTOP-JETUU7R MINGW64 /e/devops-handson/90days/day3 (master)
$ rm -rf random/
Arunima@DESKTOP-JETUU7R MINGW64 /e/devops-handson/90days/day3 (master)
$ ls
task.txt
5)To create a fruits.txt file and to view the content.
Here we used vim to create a file . Then we enter shift+i and entered contents then ecp and :wq to return
to view content we used cat command
Arunima@DESKTOP-JETUU7R MINGW64 /e/devops-handson/90days/day3 (master)
$ vim fruits.txt
Arunima@DESKTOP-JETUU7R MINGW64 /e/devops-handson/90days/day3 (master)
$ cat fruits.txt
apple
mango
cherry
banana
**
6)Add content in devops.txt (One in each line) - Apple, Mango, Banana, Cherry, Kiwi, Orange, Guava.**
Arunima@DESKTOP-JETUU7R MINGW64 /e/devops-handson/90days/day3 (master)
$ vim devops.txt
7)To Show only top three fruits from the file.
Arunima@DESKTOP-JETUU7R MINGW64 /e/devops-handson/90days/day3 (master)
$ head -3 devops.txt
Apple,
Mango,
Banana,
8)To Show only bottom three fruits from the file.
$ Arunima@DESKTOP-JETUU7R MINGW64 /e/devops-handson/90days/day3 (master)
$ tail -n 3 devops.txt
9)Create a file colour .txt add content and view it
Arunima@DESKTOP-JETUU7R MINGW64 /e/devops-handson/90days/day3 (master)
$ vim colour.txt
Arunima@DESKTOP-JETUU7R MINGW64 /e/devops-handson/90days/day3 (master)
$ cat colour.txt
Red
pink
white
black
blue
orange
purple
grey
10)To find the difference between fruits.txt and Colors.txt file.
Arunima@DESKTOP-JETUU7R MINGW64 /e/devops-handson/90days/day3 (master)
$ diff colour.txt fruits.txt
1,8c1,4
< Red
< pink
< white
< black
< blue
< orange
< purple
< grey
---
> apple
> mango
> cherry
> banana
Do share your thoughts. I'll work on it and try to get better. Thank you.
~ Arunima
Top comments (1)
Nice ❤️