How can you see file sizes in K or M?

You're asking specifically about seeing file sizes in Kilobytes (K) or Megabytes (M)!

To display file sizes in these human-readable formats (K, M, G, etc.), you need to use the ls command with the -h option in conjunction with the long listing format (-l).

So, the command you're looking for is:

ls -lh

Let me demonstrate with an example of what you might see:

# First, let's create some files of different sizes
echo "This is a small file." > small_file.txt
head /dev/urandom | tr -dc A-Za-z0-9_ | head -c 100K > medium_file.txt
head /dev/urandom | tr -dc A-Za-z0-9_ | head -c 2.5M > large_file.txt

# Now, run ls -lh
ls -lh

Output might look something like this:

total 3.0M
-rw-rw-r-- 1 labex labex 2.5M Dec 17 03:07 large_file.txt
-rw-rw-r-- 1 labex labex 100K Dec 17 03:07 medium_file.txt
-rw-rw-r-- 1 labex labex   22 Dec 17 03:07 small_file.txt

In this output:

large_file.txt is displayed as 2.5M (2.5 Megabytes)
medium_file.txt is displayed as 100K (100 Kilobytes)
small_file.txt is 22 bytes (for very small files, it might still show the exact byte count, often without a unit or with B for bytes).

So, remember: ls -lh is your go-to command for seeing file sizes in K or M!

Would you like to try creating some files and then using ls -lh to see this in your own environment?