90DaysOfDevops

Day-3 Task

• To view what's written in a file.

There are 3 ways to view what's written in a file.

Command--> cat filename

nano filename

vim filename

• To change the access permissions of files.

if you run ls -l, it will show the permissions, owner, size, and last modified date for each file in the directory.

Chmod: This command is used to change the access permissions of files and directories.

For example: Following “chmod” command will give the user permission to read, write and execute a file.

• To check which commands you have run till now.

you just need to use a command i.e history

• To remove a directory/ Folder.

There are 2 ways which i know rmdir directoryname or rm -r directoryname

• To create a fruits.txt file and to view the content.

There are 3 ways or Commands to create and view the content

For Creation For Viewing

touch fruits.txt cat fruits.txt

nano fruits.txt nano fruits.txt

vim fruits.txt vim fruits.txt

• Add content in devops.txt (One in each line) - Apple, Mango, Banana, Cherry, Kiwi, Orange, Guava.

for adding content in Devops.txt i used nano file editor

for example nano Devops.txt this command will open the file then simply add the content like : Apple, Mango, Banana, Cherry, Kiwi, Orange, Guava

after adding content press ctrl+x then Y for yes it will save the file and then hit Enter.

• To Show only top three fruits from the file.

Command ---> head -3 filename

for example head -3 Devops.txt

• To Show only bottom three fruits from the file.

Command ----> tail -3 filename

for example tail -3 Devops.txt

• To create another file Colors.txt and to view the content.

i use again nano command for ex-. nano colors.txt

for view the content cat colors.txt

• Add content in Colors.txt (One in each line) - Red, Pink, White, Black, Blue, Orange, Purple, Grey.

i use again nano command for ex - nano colors.txt and enter the content

• To find the difference between fruits.txt and Colors.txt file.

Solution --> diff fruits.txt Colors.txt