Ubuntu – Print only the first match once

bashscripts

I have a code snippet that I am using to parse through a log file and print information I need. 

for i in $(cat ~/jlog/"$2"); do
        grep "$1" ~/jlog/"$2" |
        awk '/\([a-zA-Z0-9.]+/ {print $7}' 
 done;

The problem is when I enter input in, it displays the answer multiple times:

(1.3.51.0.1.1.10.10.30.48.2084865.2084839/1.2.840.113619.2.284.3.17454802.933.1401109176.280.1)
(1.3.51.0.1.1.10.10.30.48.2084865.2084839/1.2.840.113619.2.284.3.17454802.933.1401109176.283.1)
(1.3.51.0.1.1.10.10.30.48.2084865.2084839/1.2.840.113619.2.80.977011700.14346.1401109696.2)
(1.3.51.0.1.1.10.10.30.48.2084865.2084839/1.2.840.113619.2.80.977011700.14346.1401109706.51)
(1.3.51.0.1.1.10.10.30.48.2084865.2084839/1.2.840.113619.2.80.977011700.14346.1401109758.100)
(1.3.51.0.1.1.10.10.30.48.2084865.2084839/1.2.840.113619.2.80.977011700.14346.1401109773.149)
(1.3.51.0.1.1.10.10.30.48.2084865.2084839/1.2.840.113619.2.80.977011700.14346.1401109810.198)
(1.3.51.0.1.1.10.10.30.48.2084865.2084839/1.2.840.113619.2.80.977011700.14346.1401109818.247)

Is there any way I can trim this so I can only have the first series of data display once. I only need 1.3.51.0.1.1.10.10.30.48.2084865.2084839 to print out once.

I tried to change it to this as well, but Bash does not like it:

for i in $(cat ~/jlog/"$2"); do
        grep "$1" ~/jlog/"$2" |
        awk '/\([a-zA-Z0-9.]+/' |
        awk -F'[(/]' ' {print $2, exit}'
done;

Then tried this:

for i in $(cat ~/jlog/"$2"); do
        grep "$1" ~/jlog/"$2" |
        awk -F'[(/]' '/\([a-zA-Z0-9.]+/ {print $2, exit }'
done;

Best Answer

Try this,

for i in $(cat ~/jlog/"$2"); do
        grep "$1" ~/jlog/"$2" |
        awk '/\([a-zA-Z0-9.]+/ {print $7; exit}' 
done;

exit in the awk command exits after printing the first match.

OR

Just pipe the output of for command to the below awk command,

for .... | awk -F'[(/]' '{print $2;exit}'
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