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Hello all! I am new to unix scripting and I am trying to learn a few things by writing in unix scripts utility programs I wrote in other languages. Here is where I am currently stumped: I would like to delete files older than "X" generations. By that I mean if in a given directory there are 10...

Hi all, This newbie needs some help. I've been playing with AWK and SED and am trying to figure out how to replace all non-printable characters with a "." Actually, can someone tell me how in AWK or SED, I can replace any ASCII characters in the range of 0 - 31 (x0 - x1F), but not the line feed...

Hi all, I am a bit stuck here with a seemingly simple process: How do I split a file of say X records into n files each file having X/n records? So if I have a 30,000 record file, how can I split the file into 3 files with each file containing 10,000 records? Thanks for helping out the newbie...

Hello everyone, When i try to download a file from a server to my laptop via AFP (Apple File Protocol over TCP/IP), the file transfer is unbearably SLOW. Transferring a 1 meg file takes about 2 mins (that's way too slow). However, uploading the same file to the server takes about the time to...

Hi all, how can I match using fixed locations. It seems like AWK allows pattern matching, but I need to match in a fixed position. Ex: FileA.txt contains: aaaaJobCode bbbbb aaaaJobControlbbbbb aaaaJobStatus ccccc eeeeJob dddddd If I want only those records that match "Job...

Hey everyone, newbie #1 still learning awk. I need some help: I have a file, each record contains data and a filename. I want my awk program to append each record to a file whose file name is on that records. For example, if file FILE_A.txt contains: filename_1.txt data data data filename_1.txt...

Hi all, what's the best way to drop n characters from each record in a given file? The n characters are consecutive, but they could be at the beginning, middle, or end of the record. For example, given file A.txt which has a record length of 1000, how can I get make file B.txt which has a...

Hi everyone, I can't seem to get shell quoting correct in a unix script. I tried this command in the command line, and it works great: awk -v file="input1.dat" -f program.awk input2.dat > output.dat but i can't seem to make it work in a script--I've tried a few quoting combination...

Hi everyone, I need some help! (again): I want to compare a set of fields on 2 files and create a third file where they differ. I'm not sure how to do it and I need some help!! More info: I wish to compare column locations 32-49 of files A and B. For those records in B that don't exist in A, I...

Hi everyone, if the file inFile.txt containts: 0001 GOODBYE a001.txt 0002 HELLO b001.txt 0003 STAY c001.txt and when I type this on the command line, grep 'HELLO' inFile.txt | awk '{ print $3 }' the output is a001.txt but how can I do this in a script? I have tried: #!/bin/sh...

Hi everyone, Within a script, how can I capture the output of an ftp "ls" command?? I want to capture the directory output of an ftp site, then create a simple list of all files ending in ".dat" --------- ftp -n $HOST quote USER $USER quote PASS $PASS cd $DIRECTORY ls...

Hi everyone, I am a relative newbie and have diligently been reading up on grep, sed and awk (and a few other unix goodies). It seems that searching and extracting is done mainly by pattern matching. But what if I want to do a search on some fixed locations within a file. For example: If i...

I try running this in super simple script in OS X, but it hangs..WHASSUP?? #!/bin/sh # source and target directories SOURCE_DIR='/Volumes/data_grp/HR/HROne/HROneDataWarehouse/Business Requirements/Data Management/Job Code Processing/NAM - Raw Source'...