df (disk free space) in Linux CLI - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does the df command do in Linux?

The df command shows how much disk space is used and free on your file systems.

beginner

How do you display disk space in human-readable format using df?

Use df -h. It shows sizes in KB, MB, or GB for easier reading.

intermediate

What does the df -T option show?

It shows the type of each file system along with disk usage.

intermediate

If you want to check disk space for a specific directory, how do you use df?

Run df /path/to/directory. It shows disk usage for the file system containing that directory.

advanced

What does the df --total option do?

It adds a summary line showing total disk space used and available across all file systems.

Which command shows disk space in a human-readable format?

A df -T

B df -h

C df --total

D df -a

df -h shows disk space in KB, MB, or GB, making it easy to read.

What information does df primarily provide?

A Memory usage

B CPU usage

C Disk free and used space

D Network status

df reports disk space usage and availability on file systems.

How do you find the file system type with df?

A df -T

B df -i

C df --total

D df -h

df -T adds a column showing the file system type.

Which command shows total disk usage across all file systems?

A df -h

B df -a

C df -T

D df --total

df --total adds a summary line with total disk usage.

To check disk space for the directory /home/user, you run:

A All of the above

B df -h /home/user

C df /home/user

D df -T /home/user

All these commands show disk space info for the file system containing /home/user, with different details.

Explain how to use the df command to check disk space in a way that's easy to understand.

Think about how you would tell a friend to see free space on their computer.

Describe the difference between df and df -T.

What extra info does the -T option add?