Extract First Seven Characters

[Grizzlyman]

Hi Im trying to extract the first seven characters of everyline of a file, then set those seven characters as a variable.

The text file is generated by:

who >> who.txt

So Im trying to get the usernames which on my system are always seven characters. Then store them as $var, then run

MyScript $var

Then get the username off of the next line, repeat.

Another way would be to extract everything up to the first space character.

Ive been trying to get this done but I always end up just extracting the whole line.

Any help would be great.

Thanks!

[radoulov]

You can do something like this:

who | 
  while read u j; do
	  : # do something with "$u" here
	done

Or play with who -q if your who program supports that option.