Extract strings from text files, unix.

**Anilrgowda** · 29-Nov-2007, 01:44 AM

Building a bash script. I need to process a large text file with the following sample lines:

./00300000/10000/9000/319981-4.jpg
./00300000/10000/9000/319981-1.jpg
./00300000/10000/0000/310058-1.jpg
./02000000/00000/4000/2004784-1.jpg
./02000000/00000/4000/2004299-1.jpg
./02000000/00000/4000/2004784-4.jpg
./02000000/00000/4000/2004784-3.jpg

I wish to extract just a substring of the filename portion of each line to end up with

319981
319981
310058
2004784
2004299
2004784
2004784

Any _simple_ combination of grep | sed | awk would suffice.

For extra credit: I also need to remove duplicates and sort!

**Anilrgowda** · 29-Nov-2007, 01:45 AM

sed "s#.*/\([0-9]*\)-.*#\1#" file | sort -un

29-Nov-2007, 01:44 AM	#1 (permalink)
Anilrgowda Administrator Posts: 18,702 Join Date: Jan 2006 Rep Power: 10 IM:	Extract strings from text files, unix. Building a bash script. I need to process a large text file with the following sample lines: ./00300000/10000/9000/319981-4.jpg ./00300000/10000/9000/319981-1.jpg ./00300000/10000/0000/310058-1.jpg ./02000000/00000/4000/2004784-1.jpg ./02000000/00000/4000/2004299-1.jpg ./02000000/00000/4000/2004784-4.jpg ./02000000/00000/4000/2004784-3.jpg I wish to extract just a substring of the filename portion of each line to end up with 319981 319981 310058 2004784 2004299 2004784 2004784 Any _simple_ combination of grep \| sed \| awk would suffice. For extra credit: I also need to remove duplicates and sort! ------------------

29-Nov-2007, 01:45 AM	#2 (permalink)
Anilrgowda Administrator Posts: 18,702 Join Date: Jan 2006 Rep Power: 10 IM:	Re: Extract strings from text files, unix. sed "s#./\([0-9]\)-.*#\1#" file \| sort -un ------------------

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