Cut command is used to grab something from command output or a file content

With cut c,b and f flags are used

In UTF-8 encoding c-character and b-bytes are same

Let's display first character of the file

myubuntu@myubuntu-VirtualBox:~/Desktop/shellScripts$ cat cut.txt 
This is line one
This is line two
This is line three
This is line four
This is line five
myubuntu@myubuntu-VirtualBox:~/Desktop/shellScripts$ cut -c 1 cut.txt 
T
T
T
T
T

Let's grab the first byte of the file

myubuntu@myubuntu-VirtualBox:~/Desktop/shellScripts$ cut -b 1 cut.txt 
T
T
T
T
T

Let's display first 10 charecters

myubuntu@myubuntu-VirtualBox:~/Desktop/shellScripts$ cut -c 1-10 cut.txt 
This is li
This is li
This is li
This is li
This is li

myubuntu@myubuntu-VirtualBox:~/Desktop/shellScripts$ cut -c -10 cut.txt 
This is li
This is li
This is li
This is li
This is li

Display all characters

myubuntu@myubuntu-VirtualBox:~/Desktop/shellScripts$ cut -c 1- cut.txt 
This is line one
This is line two
This is line three
This is line four
This is line five

By default cut has tab as a field delimiter

myubuntu@myubuntu-VirtualBox:~/Desktop/shellScripts$ cut -f 1 cut.txt 
This
This
This
This
This
myubuntu@myubuntu-VirtualBox:~/Desktop/shellScripts$ cut -f 1- cut.txt 
This	is	line	one
This	is	line	two
This	is	line	three
This	is	line	four
This	is	line	five
myubuntu@myubuntu-VirtualBox:~/Desktop/shellScripts$ cut -f -3 cut.txt 
This	is	line
This	is	line
This	is	line
This	is	line
This	is	line

-d should be used to specify the delimiter

myubuntu@myubuntu-VirtualBox:~/Desktop/shellScripts$ cut -d " " -f 4 cut.txt 
one
two
three
four
five

If we want to get the result with other delimiter use --output-delimiter flag

myubuntu@myubuntu-VirtualBox:~/Desktop/shellScripts$ cut -d " " -f -3 cut.txt --output-delimiter="|"
This|is|line
This|is|line
This|is|line
This|is|line
This|is|line

Let's have the content of the file as

myubuntu@myubuntu-VirtualBox:~/Desktop/shellScripts$ cat cut.txt 
This is line one
This is line two
This is line three
This is line four
This is line five

This	is	line	one	delimited	by	tab
This	is	line	two	delimited	by	tab
This	is	line	three	delimited	by	tab

File has both tab and space as a delimiter let's use cut operations

myubuntu@myubuntu-VirtualBox:~/Desktop/shellScripts$ cut -d " " -f -3 cut.txt
This is line
This is line
This is line
This is line
This is line

This	is	line	one	delimited	by	tab
This	is	line	two	delimited	by	tab
This	is	line	three	delimited	by	tab
myubuntu@myubuntu-VirtualBox:~/Desktop/shellScripts$ cut -f -3 cut.txt
This is line one
This is line two
This is line three
This is line four
This is line five

This	is	line
This	is	line
This	is	line

In order to get a proper out put s flag is used

myubuntu@myubuntu-VirtualBox:~/Desktop/shellScripts$ cut -d " " -sf -3 cut.txt
This is line
This is line
This is line
This is line
This is line
myubuntu@myubuntu-VirtualBox:~/Desktop/shellScripts$ cut -sf -3 cut.txt
This	is	line
This	is	line
This	is	line