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Adding a character

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# 1  
Old 05-21-2013
Adding a character
Hello experts.

I trying to achieve 2 things here. I'm trying to convert all of the host names to lower case and add an "m" to each hostname. Can anyone provide some guidance on what I can do? Your input is greatly valued!

Here are the desired results:
1. read the host name from a file.
2. convert from upper to lower case. ex SERVER > server
3. add character "m" to the host name. ex. serverm
4. write the desired output to a separate file called hosts.

---------- Post updated at 10:25 AM ---------- Previous update was at 10:23 AM ----------

Code:
# get the filename
#!/usr/bin/ksh
 
echo -n "Enter filename:"
read filename
 
# make sure the file exists for reading
if [ ! -f $filename ]; then
             echo "filename $filename does not exists"
fi
 
# convert upper to lower case and write to hosts file 
tr '[A-Z]' '[a-z]' <$filename > hosts
 
# add character m to the end of each hostname 
if [[ $filename = "hosts" ]]; then
 
             sed 's/./&m/6' hosts
             exit 1
fi

Last edited by Scrutinizer; 05-21-2013 at 12:38 PM.. Reason: Removed spurious formatting
# 2  
Old 05-21-2013
Post a sample of the input and desired output...
# 3  
Old 05-21-2013
Input: SERVER
Output: serverm
# 4  
Old 05-21-2013
Using awk
Code:
awk '{ print tolower($0) "m" }' filename

This User Gave Thanks to Yoda For This Post:
david_tech
# 5  
Old 05-21-2013
Yoda,

Thank you for your reply. That was really helpfull but I'm still having difficulty writing the desired output to the file.
# 6  
Old 05-21-2013
Quote:
Originally Posted by david_tech
but I'm still having difficulty writing the desired output to the file.
What difficulties are you having?

By the way you can redirect the output to another file: hosts
Code:
awk '{ print tolower($0) "m" }' filename > hosts

This User Gave Thanks to Yoda For This Post:
david_tech
# 7  
Old 05-21-2013
This is in the ksh environment. Will it override the exiting file each time?
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