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append a line to the last line in a file

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# 1  
Old 03-28-2007
append a line to the last line in a file
Suppose i have a file "xyz.txt" which contains

abcdef
ghijklm
nop



Now in want to add "qrst" to the last line such that the file becomes

abcdef
ghijklm
nopqrst


P.S:The o/p i need is
abcdef
ghijklm
nopqrst (and not) nop
qrst
# 2  
Old 03-28-2007
Try this..

Code:
echo "$(cat file)qrst" >temp
mv temp file

O/p:
cat file
abcdef
ghijklm
nop
echo "$(cat file)qrst"
abcdef
ghijklm
nopqrst
Last edited by dennis.jacob; 03-28-2007 at 03:27 AM..
# 3  
Old 03-28-2007
Using sed

Code:
$ cat xyz.txt
abcdef
ghijklm
nop
$ sed '$ a\qrst' xyz.txt
abcdef
ghijklm
nop
qrst
$ sed '$ a\qrst' xyz.txt > abc.txt
$ mv abc.txt xyz.txt
$ cat xyz.txt
abcdef
ghijklm
nop
qrst
$

# 4  
Old 03-28-2007
I seem to have misunderstood the requirement. Hope below is the required soln.

Code:
$ sed '$ s/^\(.*\)$/\1qrst/' xyz.txt
abcdef
ghijklm
nopqrst

# 5  
Old 03-29-2007
Code:
awk '{ printf "\n%s", $0 }END{ printf "abcdefghijkl\n" }' filename

# 6  
Old 04-25-2007
sed '$s/$/&qrst/' input_file
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