Hi All,
How to prevent starting of processes that have duplicate entries in cron file, i have written a shell script to validate with "ps |grep" command before starting the process, but still when same process started at same time, it may not be able to detect the existing process.
Sample... (3 Replies)
Can anyone help me how can i print only the unique entry in a line?
MI_AP MI_AP MI_CM MI_MF
RC_NAP MBS_AP SF_RAN MBS_AP NT_CAR
so that it will on output the one unique entry per line.
MI_AP MI_CM MI_MF
RC_NAP MBS_AP SF_RAN NT_CAR
I can't find the same situation on the knowledge... (5 Replies)
I have file where it contains 2 columns. In two columns the first column is repeated more than once. I wanted to take the unique record in first column
and the corresponding second column value .
The below is the example of the file:
8244100320012955|000b063471a4... (4 Replies)
Hi *,
I need to delete duplicate lease entries in file according to MAC/IP.
I'm having tempfile which contains many lease info and need to have one entry for each IP(not more than that), if it contains more than one entry for same set, need to be deleted that entry...
EX:
lease... (4 Replies)
I am very new to bash scripting and this is my first script.
I am trying to write a script that takes an argument d as the directory.
It looks through the files to find duplicates and delete them.
Here's some sorta-pseudocode but am unsure how to implement it:
#! /bin/bash
#get... (1 Reply)
I have a short line of code that checks very rudimentary for duplicate code:
sort myfile.cpp | uniq -c | grep -v "^.*1 " | grep -v "}"
It sorts the file, counts occurrences of each line, removes single occurrences and removes the ubiquitous closing brace. The language is C++, but is easily... (3 Replies)
Hi all
I have a big file like this in rows and columns from 2 column onwards the next column is desciption of previous column means 3rd columns is description of 2 columns and 5 column is description of 4 column.
All cloumns are separated by comma
... (1 Reply)
Hi Gurus,
I am trying to connect to remote host from current host to check crontab entries. I have started like this
ssh -n -l db2psp 205.191.156.17 ". ~/.profile >/dev/null 2>/dev/null; cd log ;ls | wc -l"
I got this error ?
ssh: connect to host 205.191.156.17 port 22:... (1 Reply)
I am working on an Urdu to Hindi dictionary and I have created the following file structure:
Headword=Gloss1,Gloss2,Gloss3
i.e. glosses delimited by a comma.
It so happens that in some cases (around 6000+ in a file of over 200,000+ the glosses are duplicated.
Since this may be a... (3 Replies)
I have a job that produces a file of barcodes that gets added to every time the job runs
I want to check the list to see if the barcode is already in the list and report it out if it is. (3 Replies)
Discussion started by: worky
3 Replies
LEARN ABOUT OSX
uniq
UNIQ(1) BSD General Commands Manual UNIQ(1)NAME
uniq -- report or filter out repeated lines in a file
SYNOPSIS
uniq [-c | -d | -u] [-i] [-f num] [-s chars] [input_file [output_file]]
DESCRIPTION
The uniq utility reads the specified input_file comparing adjacent lines, and writes a copy of each unique input line to the output_file. If
input_file is a single dash ('-') or absent, the standard input is read. If output_file is absent, standard output is used for output. The
second and succeeding copies of identical adjacent input lines are not written. Repeated lines in the input will not be detected if they are
not adjacent, so it may be necessary to sort the files first.
The following options are available:
-c Precede each output line with the count of the number of times the line occurred in the input, followed by a single space.
-d Only output lines that are repeated in the input.
-f num Ignore the first num fields in each input line when doing comparisons. A field is a string of non-blank characters separated from
adjacent fields by blanks. Field numbers are one based, i.e., the first field is field one.
-s chars
Ignore the first chars characters in each input line when doing comparisons. If specified in conjunction with the -f option, the
first chars characters after the first num fields will be ignored. Character numbers are one based, i.e., the first character is
character one.
-u Only output lines that are not repeated in the input.
-i Case insensitive comparison of lines.
ENVIRONMENT
The LANG, LC_ALL, LC_COLLATE and LC_CTYPE environment variables affect the execution of uniq as described in environ(7).
EXIT STATUS
The uniq utility exits 0 on success, and >0 if an error occurs.
COMPATIBILITY
The historic +number and -number options have been deprecated but are still supported in this implementation.
SEE ALSO sort(1)STANDARDS
The uniq utility conforms to IEEE Std 1003.1-2001 (``POSIX.1'') as amended by Cor. 1-2002.
HISTORY
A uniq command appeared in Version 3 AT&T UNIX.
BSD July 3, 2004 BSD