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Shell Programming and Scripting

cut a line after a character

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# 1  
Old 05-02-2012
cut a line after a character
hello!
i'd like to ask if there's a way using sed in order to cut every character of a line after a certain character.My output looks like this:

blabla blavbla blabla # bla bla bla

and i want it to be :

blabla blavbla blabla

thanks in advance
# 2  
Old 05-02-2012
Code:
 
$ echo "blabla blavbla blabla # bla bla bla" | sed 's,#.*,,'
blabla blavbla blabla

# 3  
Old 05-02-2012
thanks a lot!

is there a way to save everything that was deleted in a file?
# 4  
Old 05-02-2012
first take a backup of your file

Code:
 
cp file.txt file.txt.bk

If your sed supports -i then use the below

Code:
sed -i 's,#.*,,' file.txt

otherwise, redirect the output to out.txt

Code:
sed -i 's,#.*,,' file.txt > out.txt

# 5  
Old 05-02-2012
thank you so much!
# 6  
Old 05-02-2012
Code:
sed -n '/ *#.*/w changedoriglines
s/ *#.*//p' xyz > changedlines

changedoriglines will contain the original (unmodified) version of the input lines matching the pattern.

changedlines will contain the modified version of the input lines.
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