Day 3 : DevOps ❤️

Let's Discuss some more questions on Linux

To view what's written in a file.
```
 cat file_name
```
1. Change the access permissions of files to make them readable, writable, and executable by the owner only.

    chmod 700 file_name

permission_code :

Read: 4
Write: 2
Execute: 1

\=> Users:Groups: Others

For Ex: chmod 700 file.sh

The above command means that users have all the 3 permissions (i.e. read, write, execute) on the other hand groups, and others have no permissions.

Check the last 10 commands you have run.
```
 history | tail -n 10
```
To remove a directory/ Folder
```
 rm -r folder_name
```
-r = recursively (used if the folder is not empty)
Create a fruits.txt file, add content (one fruit per line), and display the content.
```
 touch fruits.txt
 cat fruits.txt
```

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

 echo "Apple" > devops.txt 
 echo "Mango" >> devops.txt 
 echo "Banana" >> devops.txt 
 echo "Cherry" >> devops.txt 
 echo "Kiwi" >> devops.txt 
 echo "Orange" >> devops.txt 
 echo "Guava" >> devops.txt

Show the first three fruits from the file in reverse order.
```
 head -n 3 devops.txt | tac
```
Show the bottom three fruits from the file, and then sort them alphabetically.
```
 tail -n 3 devops.txt | sort
```
Create another file Colors.txt, add content (one color per line), and display the content.
```
 touch Colors.txt
 cat Colors.txt
```
Add content in Colors.txt (one in each line) - Red, Pink, White, Black, Blue, Orange, Purple, Grey. Then, prepend "Yellow" to the beginning of the file.
```
echo "Yellow" | cat - devops.txt > temp && mv temp devops.txt
```

Find and display the lines that are common between fruits.txt and Colors.txt.

sort file1.txt -o fruits.txt
sort file2.txt -o Colors.txt
comm -12 fruits.txt fruits.txt

Count the number of lines, words, and characters in both fruits.txt and Colors.txt.
```
wc fruits.txt
wc Colors.txt
```

Cute Bye GIFs | Tenor

Day 3 : DevOps ❤️

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Let's Discuss some more questions on Linux