Hello, I am a very novice user of awk, I have a set of files named file001, file002, file003, file004, etc., each contains four fields (columns of data) separated each by a uneven number of spaces. I want to substitute those spaces by a TAB, so I am using this line of awk script:
I've tried several ways of looping but all of them were unsuccessful, and although this is still way faster than introducing the TAB's by hand it still takes a lot of time to go through all of them.
Thanks,
Close. Try:
Almost any command that reads and writes a file using the command line syntax:
will have file truncated to size 0 by the shell before command starts running.
The cp in the script could be changed to mv (which would be more efficient) iff all of the files you want to update only have one link. (If you know that your input files all only have one link and you change the cp to mv, you can also get rid of the rm at the end of the script.)
This User Gave Thanks to Don Cragun For This Post:
Hi Gurus,
i have to transfer files one by one from ftp server to target server
all files which is to be transferred lies in one ftp folder
i have to move those files sequentially from ftp to target and must verify files for successful transmission .
then i have to delete corresponding... (1 Reply)
Hello
I am new to Perl, in fact I am on chapter one of the book. :) However I am in need of a Perl Script faster than I can finish the book. Perhaps someone can help me with my immediate need while I read my book.
I have a directory with hundreds of files that are all named like... (4 Replies)
Hi,
I am trying to process 2 files simultaneously using awk satisfying following condition,
Both files contain 3 columns. It should take entry from column 1 from first file, look for that entry in file 2 and if found, add column 2 and column 3 from both files and output to third file. For e.g.... (4 Replies)
Hi Everyone,
I was wondering if someone could help me to transform my data into a format I need.
Here is an example of what my data looks like
E F G H
A 1 2 3 4
B 5 6 7 8
C 9 1 2 3
D 4 5 6 7
and this is what I would need it to look like:
AE 1
BE 5
CE 9
DE 4
AF 2
BF 6
CF 1 (6 Replies)
Hello Unix.com
How can I sort from a large email list only the emails that finish with .ca domain?
cat <list> | grep "\.ca\b" >> <new list> isnt working perfectly.
Any tips?
Best regards, Galford D. Weller (2 Replies)
Hello.
grep v2.21
Debian 8
I wish to search for and output these patterns in order;
"From " "To: " "Subject: " "Message-Id: " "Date: " "To: "
grep works, but not in strict order...
$ grep -a -E "^From |^Subject:|^From: |^Message-Id: |^Date: |^To: " InboxResult;
From - Wed Feb 18... (10 Replies)
Hello team,
We wish to develop a script as follows :
1. Rename multiple files in the following way:
example
Original file names : test.txt and dummy.txt
New file names : test.$(date +"%F").AAAAA<serialno_1>.BBBBBB.p and dummy.$(date +"%F").AAAAA<serialno_2>.BBBBBB.p
2. The... (3 Replies)
Hello,
I need to collect some statistical results from a series of files that are being generated by other software. The files are tab delimited. There are 4 different sets of statistics in each file where there is a line indicating what the statistic set is, followed by 5 lines of values. It... (8 Replies)
Discussion started by: LMHmedchem
8 Replies
LEARN ABOUT OSX
sleep
SLEEP(1) BSD General Commands Manual SLEEP(1)NAME
sleep -- suspend execution for an interval of time
SYNOPSIS
sleep seconds
DESCRIPTION
The sleep command suspends execution for a minimum of seconds.
If the sleep command receives a signal, it takes the standard action.
IMPLEMENTATION NOTES
The SIGALRM signal is not handled specially by this implementation.
The sleep command will accept and honor a non-integer number of specified seconds (with a '.' character as a decimal point). This is a non-
portable extension, and its use will nearly guarantee that a shell script will not execute properly on another system.
EXIT STATUS
The sleep utility exits 0 on success, and >0 if an error occurs.
EXAMPLES
To schedule the execution of a command for x number seconds later (with csh(1)):
(sleep 1800; sh command_file >& errors)&
This incantation would wait a half hour before running the script command_file. (See the at(1) utility.)
To reiteratively run a command (with the csh(1)):
while (1)
if (! -r zzz.rawdata) then
sleep 300
else
foreach i (`ls *.rawdata`)
sleep 70
awk -f collapse_data $i >> results
end
break
endif
end
The scenario for a script such as this might be: a program currently running is taking longer than expected to process a series of files, and
it would be nice to have another program start processing the files created by the first program as soon as it is finished (when zzz.rawdata
is created). The script checks every five minutes for the file zzz.rawdata, when the file is found, then another portion processing is done
courteously by sleeping for 70 seconds in between each awk job.
SEE ALSO nanosleep(2), sleep(3)STANDARDS
The sleep command is expected to be IEEE Std 1003.2 (``POSIX.2'') compatible.
HISTORY
A sleep command appeared in Version 4 AT&T UNIX.
BSD April 18, 1994 BSD