Basic Linux Commands

What is the Linux command to view what's written in a file?

cat filename

The above command is used to view the content of any files.

What is the Linux command to change the access permissions of files?

chmod

Above command is used to change the permission, but to give particular permissions we can use the following commands with chmod

1. chmod +rwx filename to add permissions.

2. chmod -rwx directoryname to remove permissions.

3. chmod +x filename to allow executable permissions.

4. chmod -wx filename to take out write and executable permissions.

What is the Linux command to check which commands you have run till now?

history

above command is used to check which commands we run till now.

What is the Linux command to remove a directory/folder?

rmdir directoryname

above command is used to remove any directory or folder.

What is the Linux command to create a fruits.txt file and view the content?

To create file 
touch fruits.txt

To view content
cat

The above command is used to create files, we can use nano or vim commands

What is the Linux command to add content in devops.txt (One in each line) - Apple, Mango, Banana, Cherry, Kiwi, Orange, Guava?

touch devops.txt
Apple
Mango
Banana
Cherry
Kiwi
Orange
Guava

The above command is used to add the content, we can also use nano, and vim commands to add content.

What is the Linux command to show only the top three fruits from the file?

head -n 3 devops.txt

The above command is used to show only the top three fruits of file devops.txt.

What is the Linux command to show only the bottom three fruits from the file?

tail -n 3 devops.txt

The above command is used to show only the bottom 3 fruits of file devops.txt.

What is the Linux command to create another file Colors.txt and to view the content?

vim Colors.txt
cat Colors.txt

The above command is used to create files, we can also use the touch, and nano commands to create a file and the cat command is used to view the content of any file.

What is the Linux command used to add content in Colors.txt (One in each line) - Red, Pink, White, Black, Blue, Orange, Purple, Grey?

touch Color.txt
 Red
 Pink
 White
 Black
 Blue
 Orange
 Purple
 Grey

The above command is used to add content, we can also use the nano and vim commands to add content in the file.

What is the Linux command used to find the difference between fruits.txt and Colors.txt files?

diff fruits.txt Color.txt

The above command is used to find the difference between any two files.