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DevOps(Day-3)
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Linux(Solving Questions)
To view what's written in a file.
We can use the "cat" command to view the contents of the file.
cat <path_of_file>
To change the access permissions of files.
The permission for any file or directory goes like this:-
drwxrwxrwx <username> <groupname> <filename>
d-> Directory.
The first set of rwx -> User permission.
The second set of rwx -> Group permission.
The third set of rwx -> Other permission.
chmod <permission that varies from 000 to 777> <filename>
To check which commands you have run till now.
"history"
To remove a directory/ Folder.
rm <filename>
rmdir <foldername>
-r:- can be used to delete recursively in a folder.
-f:- Delete forcefully.
To create a fruits.txt file and to view the content.
touch fruits.txt
cat fruits.txt
Add content in fruits.txt (One in each line) - Apple, Mango, Banana, Cherry, Kiwi, Orange, Guava.
Contents are added using Vim editor.
vim fruits.txt
Show only the top three fruits from the file.
head -n <filename>
n:- the line number from starting of the file.
Show only the bottom three fruits from the file.
tail -n <filename>
n:- the line number from starting of the file.
To create another file Colors.txt and to view the content.
touch Colors.txt
cat Colors.txt
Add content in Colors.txt (One in each line) - Red, Pink, White, Black, Blue, Orange, Purple, and Grey.
Using Vim <filename> to edit the file.
To find the difference between the fruits.txt and Colors.txt files.
diff <file1> <file2>
sdiff <file1> <file2>
-a: add
-c: change
-d: delete
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