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Old 02-24-2009, 10:48 PM   #1
Registered: Mar 2006
Posts: 34

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Using sed in a shell script to add date and time

No clue if I'm doing this right, but what I'm trying to accomplish is add the current date and time to each line of the output.

today=date +"%D"
hour=date +"%T"
for y in 205 206 207 208
while [ $COUNT -lt 253 ]; do
snmpget -v 2c -Ovq -r 0 -c public 1.1.$y.$COUNT SNMPv2-SMI::enterprises.9986. SNMPv2-SMI::enterprises.9986. SNMPv2-SMI::enterprises.9986. | sed -n '1h;2,$H;${g;s/\n/;/g;p}' >> data.xls
sed -i 's/$/$today;$hour/' data.xls
I thought that
sed -i 's/$/$today;$hour/' test
would work but it only adds $today;$hour to the file.

Any help would be greatly appreciated

Thanks in advance.
Old 02-24-2009, 11:42 PM   #2
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If you use double quotes rather than single, sed will allow variable substitution. I doubt you'll like the result much more though.
Have you attempted to run that script ??? - I can't believe the assignments for today and hour will work.

And if you can get them to do what you appear to want, the slashes in the $today field will upset sed monumentally - try +%F instead maybe.
Old 02-24-2009, 11:42 PM   #3
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Registered: Dec 2007
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See if this works for you.


TODAY=$(date +%D)
HOUR=$(date +%T)

echo $TODAY
echo $HOUR

LINE="A line of text."

echo "LINE before sed: $LINE"

echo -n "LINE after sed: "

echo $LINE | sed -e "s|$| $TODAY $HOUR|"
Old 02-25-2009, 01:21 PM   #4
Registered: Mar 2006
Posts: 34

Original Poster
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TODAY=$(date +%D)
HOUR=$(date +%T)

sed -i "s|$|$TODAY;$HOUR|" test

That worked like a charm

Thanks for all the help!


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