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Delete blank spaces and blank lines in a file

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# 1  
Old 02-10-2015
Delete blank spaces and blank lines in a file
Hi Gurus,
Somebody can say me how to delete blank spaces and blank lines in a file unix, please.

Thank you for advanced.
# 2  
Old 02-10-2015
Well, that rather depends. There are several tools to do a variety of things, but can you show us some sample input & output wrapped in CODE tags for clarity.

It would be good to know the OS and version you are running so we don't suggest tools your won't have. The output from uname -a would be useful.



Regards,
Robin
# 3  
Old 02-10-2015
Please be more precise - do you want to eliminate ALL spaces even though they might be field separators? What about <TAB>s? Are lines that contain nothing but white space to be considered "blank" lines?
# 4  
Old 02-10-2015
Hi Gurus,
My file have spaces separators TAB and back spaces, I need one command for delete all spaces and all blank lines in this file.

Thank you for advanced.
# 5  
Old 02-10-2015
... and do you want back-spaces retained or removed?

Can you show us the input and output? If there are non-printable characters, perhaps send the files through od to give us the character codes:-
Code:
od -x file



Robin
# 6  
Old 02-10-2015
Hi Gurus,
I need to back-spaces removed, i am using operative system Solaris.

Thanks & Regards.
# 7  
Old 02-10-2015
Hi,
Many examples with sed:

Delete blank line:
Code:
sed -e '/^[[:space:]]*$/d' file

Delete blank space:
Code:
sed -e 's/[[:space:]]//g' file

Replace several blank spaces by only one blank space
Code:
sed -e 's/\([[:space:]]\)[[:space:]]*/\1/g' file

Regards.
Last edited by disedorgue; 02-11-2015 at 07:01 AM.. Reason: Previous unconstructive message.
This User Gave Thanks to disedorgue For This Post:
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