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Shell Programming and Scripting
Delete records within a file upon a condition
Post 302773803 by Yoda on Thursday 28th of February 2013 05:12:03 PM
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1. Shell Programming and Scripting
I have a big file with "|" delimiter. I want to delete all the records that have 'abc' in the 2nd field. How can i do that? I am not abe to open it in VI that is why i need to do it from outside. Please suggest (6 Replies)
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2. Shell Programming and Scripting
Hi All,
I want to delete duplicate records from a tilde delimited file. Criteria is considering the first 2 fields, the combination of which has to be unique, below is a sample of records in the input file
1620000010338~2446694087~0~20061130220000~A00BCC1CT... (5 Replies)
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3. UNIX for Dummies Questions & Answers
file_in_1:
1 2 3 4
5 6 7 8
9 10 11 12
13 14 15 16
17 18 19 20
21 22 23 24
25 26 27 28
29 30 31 32
file_in_2:
9 10 11 12
21 22 23 24
1 2 3 4
17 18 19 20
file_out: (5 Replies)
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I am curious if the following can be done in a file in unix. Let's say I have a flat file with the following data
AAA,12,2,,,,
BBB,3,1,,,,
CCC,,,,,
DDD,2,,,,,
SQQ,,,,,
ASJ,,3,5
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5. Shell Programming and Scripting
Dear members..
I have a fixed width file. Requirement is as below:-
1. Scan each record from this fixed width file
2. Check for value under field no "6" equals to "ABC". If yes, then filter this record into the output file
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Need unix commands to delete records from one file if the same record present in another file...
just like join ... if the record present in both files.. delete from first file or delete the particular record and write the unmatched records to new file..
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Hi,
To load a big file in a table,I have a make sure that all rows in the file has same number of the columns .
So in my file if I am getting any rows which have columns not equal to 6 , I need to delete it . Delimiter is space and columns are optionally enclosed by "".
This can be ... (1 Reply)
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8. Shell Programming and Scripting
Hello,
I have a directory with many files whose creation time is distributed all over the day.
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...
20 files for hour 23
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9. Shell Programming and Scripting
I want to keep last 2 days data from a file and want to delete others data from the file. Please help me.
Sample Input
# cat messages-2
Apr 15 11:25:03 test1 kernel: imklog 4.6.2, log source = /proc/kmsg started.
Apr 15 11:25:03 test1 rsyslogd: (re)start
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I have csv file with 30, 40 columns
Pasting just three column for problem description
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LEARN ABOUT LINUX
mixer
MIXER(1) The Canonical Csound Reference MIXER(1) NAME
mixer - Mixes together a number of soundfiles. . DESCRIPTION
Mixes together a number of soundfiles, starting at different times and with individual channel selection from the input files. SYNTAX
mixer [OPTIONS ... ] infile [[OPTIONS... ] infile] ... INITIALIZATION
Flags: o -A = Generate an AIFF output file. o -W = Generate an WAV output file. o -h = Generate an output file with no header. o -c = Generate 8-bit signed_char sound samples. o -a = Generate alaw sound samples. o -u = Generate ulaw sound samples. o -s = Generate short integer sound samples. o -l = Generate long (32 bit) integer sound samples. o -f = Generate floating point samples. o -F arg = Specifies the gain to be applied to the following input file. If arg is a floating point number that gain is applied uniformly to the input. Alternatively it could be a file name which specifies a breakpoint file for varying the gain for different periods. o -S integer = Indicate at which sample to start to mix in the next input file. o -T fpnum = Indicate at which time (in seconds) to start to mix in the next input file. o -1 = Mix in channel 1 from next sound file. o -2 = Mix in channel 2 from next sound file. o -3 = Mix in channel 3 from next sound file. o -4 = Mix in channel 4 from next sound file. o -^ intx inty = Mix in channel x from next sound file as channel y in the output. o -v = Verbose mode. o -R = Continually rewrite the header while writing soundfile (WAV/AIFF). o -H integer = Show a "heart-beat" to indicate progress, in style 1, 2 or 3. o -N = Alert call (usually ringing the bell) when finished. o -o fname = output file name (default: test.wav) EXAMPLES
The default values are mixer -s -otest -F 1.0 -S 0 For example mixer -F 0.96 in1.wav -S 300 -2 in2.aiff -S 300 -^4 1 in3.wav -o out.wav This creates a new sound file with a constant gain of 0.96 from in1.wav with the second channel of in2.aiff mixed in after 300 samples and channel 4 of in3.wav outpout as channel 1 after 300 samples. CREDITS
Author: John ffitch 1994 AUTHORS
Barry Vercoe MIT Media Lab Author. Dan Ellis MIT Media Lab, Cambridge Massachussetts Author. COPYRIGHT
5.07 06/23/2009 MIXER(1)