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Deleting comments from fields

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# 1  
Old 02-13-2014
Deleting comments from fields
Hi

I have this sample data set as follows (called file.txt):
Code:
hostname1:user1:password
hostname2:user1:password   #comments comments
hostname3:user1:password

I wish to produce a report as follows:
Code:
hostname1 user1 password
hostname2 user1 password
hostname3 user1 password

ie remove all trailing whitespace and comments.

So far I have tried this and it works:
Code:
awk -F":" '{print $1,$2,$3}' file.txt | awk '{print $1,$2,$3}'

I was wondering if there is a more elegant way of programming this (without the pipe). Does awk allow you to change the FS midway for example?

Thanks in advance.
# 2  
Old 02-13-2014
Sed is a more appropriate tool for this task in my opinion:
Code:
sed 's/ *#.*//;s/:/ /g' file.txt

This User Gave Thanks to bartus11 For This Post:
tsu3000
# 3  
Old 02-13-2014
Or:
Code:
awk -F"[: ]" '{print $1,$2,$3}' file

# 4  
Old 02-13-2014
OR
Code:
awk -F'[: ]' '{NF=3}1' file

# 5  
Old 02-13-2014
OR

Code:
$ awk -F':|#.*' '{$1=$1}1' file

This User Gave Thanks to Akshay Hegde For This Post:
tsu3000
# 6  
Old 02-14-2014
Code:
awk -F" " '/#comments comments/ {gsub("#comments comments", "    ")}1' file

---------- Post updated at 02:42 AM ---------- Previous update was at 02:38 AM ----------

Code:
awk -F"[: ]" ' {gsub("#comments comments", " ")} { print $1,$2,$3}' file

Last edited by Franklin52; 02-14-2014 at 04:17 AM.. Reason: Please use code tags
# 7  
Old 02-14-2014
Try also
Code:
awk -F: '{gsub(/#.*$|:/," ")}1' file
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