script to replace a character with '(Apostrophe)

Shell Programming and Scripting
1

Hi Friends,

I need a sed or awk based script to replace a character(alphabet) with ' (Apostrophe). I tried to use the following two commands

1) sed -e 's/a/'/' filename
2) awk '{sub("a","'",$1);print}' filename

but both got failed.
Any help on this.

Thanks in advance..

2 
/home/chris>cat test.out
testing a  script
/home/chris>sed -i "s:a:\':g" test.out
/home/chris>cat test.out
testing ' script
3

You're close, you can do it with:

sed -e "s/a/'/" filename (note the quote types.)

4

Another way with tr :

tr a "'" <infile

Jean-Pierre.