Remove Blank lines in VI

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# 1  
Old 09-18-2013
IBM Remove Blank lines in VI


Which option is used to remove blank lines in VI (AIX). ?

# 2  
Old 09-18-2013
Use the following options

<esc>:g/^$/d to delete blank lines that do not contain spaces.

If it contains spaces, then use <esc>:g/^ *$/d
# 3  
Old 09-18-2013
Hi Krish,

No luck, any other options? I am using AIX VI

---------- Post updated at 09:08 AM ---------- Previous update was at 05:04 AM ----------

Hi Krish,

Apologizes, Your tip worked but I wrongly questioned for blank lines. My question is to remove blank spaces/trail spaces in a line using VI.

# 4  
Old 09-18-2013
You should post what you have tried.

Trail spaces like (eg only)


s/  *//g;

# 5  
Old 09-18-2013
Hi Mathan,

No luck, not working in AIX VI.
# 6  
Old 09-18-2013
You need to give us a suitable example of the lines with blank spaces so we can see what blanks/spaces you wish to remove.
# 7  
Old 09-18-2013
To remove trailing spaces from all lines in your editing buffer and then remove empty lines:
:g/ *$/s///

Note that by definition, blank lines contain zero or more <space> and <tab> characters. If you have tabs in your blank lines or if you want to remove trailing blanks (instead of trailing spaces), use:
:g/[ T]*$/s///

where the T above is replaced by a tab character.
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