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Shell Programming and Scripting

Unix programming scripts.

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# 1  
Old 03-06-2007
Unix programming scripts.
How can I replace "?" with the appropriate information.
# 2  
Old 03-06-2007
Using sed
Actual File:
cat /tmp/question
What is the correct answer??
Replace th?s
??
Hello Boss? ???
?? hell ??

This is substitue ' ! ' in all occurrences of ' ? '.
sed 's/?/!/g' /tmp/question

After replacement:
What is the correct answer!!
Replace th!s
!!
Hello Boss! !!!
!! hell !!

Please let us know if this works..

Thanks
Nagaraj G
# 3  
Old 03-07-2007
in Perl:
Code:
$ perl -pi -e 's/\?/!/g' filename

replace all occurances of ? with ! in filename
# 4  
Old 03-07-2007
an alternate way with awk could be:

Code:
echo "HELLO? HOW ARE YOU?" | awk '{ gsub(/\?/, "\|");     print $0; }'

output:

Quote:
HELLO| HOW ARE YOU|
# 5  
Old 03-07-2007
Hi ennstate,

from you thread:

sed 's/?/!/g' /tmp/question

can you explain what mean "s" and "g" and thereis any other alphabet that using in sed command?
thank you



Regards,


heru
# 6  
Old 03-07-2007
Thank you for your answer guys, I really appreciate it.
# 7  
Old 03-07-2007
Quote:
Originally Posted by heru_90
Hi ennstate,

from you thread:

sed 's/?/!/g' /tmp/question

can you explain what mean "s" and "g" and thereis any other alphabet that using in sed command?
s is search and replace; g is global, i.e., replace all occurrences of the search pattern instead of only replacing the first.

There are many other commands; read the man page for more information, or go to one of the on-line resources listed on my shell links page: http://cfaj.freeshell.org/shell/resources.shtml
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