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Remove blank lines and comments from text file

 
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# 1  
Old 06-17-2010
Remove blank lines and comments from text file
Hi,

I am using BASH. How can I remove any lines in a text file that are either blank or begin with a # (ie. comments)? Thanks in advance.

Mike
# 2  
Old 06-17-2010
Code:
# cat 2
sdasdasdasdasd
 
sadasdasdasda
 
#sdffsfsdfsdfsd

Code:
# sed -e '/^$/d;' -e '/^#/d;' 2
sdasdasdasdasd
sadasdasdasda

# 3  
Old 06-17-2010
Try
Code:
grep -vE '^#|^ *$' file

or
Code:
egrep -v '^#|^ *$' file

# 4  
Old 06-17-2010
Code:
egrep -v '^#|^[[:space:]]*$' infile

Code:
awk 'NF&&!/^#/' infile

 
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