Command comparisons Post: 302535488

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Script to automate file comparisons

Hi, I need a script that loops through all the files two directories passed to it via parameter, and if two files have the same name, do a cmp comparison on the files. If the files are different, output the specifics returned by cmp. What's the best way to go about writing this, as I am a...

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Can grep do numerical comparisons?

Say for example I have a list of numbers.. 5 10 13 48 1 could I use grep to show only those numbers that are above 10? For various reasons I can only use grep... not awk or sed etc.

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I have two files.And a sort of matrix analysis. Both files have a string followed by two numbers: File 1: A 2 7 B 3 11 C 5 10 ...... File 2: X 1 10 Y 3 5 Z 5 9 What I'd like to do is for each set of numbers in the second file indicate if the first or second number (or both) in...

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Best practice for bracket comparisons?

So, I have no formal higher education in programming at all and am self taught. I am now wondering what would be considered best practices? Like should I hard code a variable, then compare it to what I want to know or achieve, or should I just put the commands with in the brackets? Example, a...

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String comparisons

Can someone please tell me what is wrong with this stings comparison? #!/bin/sh #set -xv set -u VAR=$(ping -c 5 -w 10 google.com | grep icmp_req=5 | awk '{print $6}') echo I like cookies echo $VAR if "$VAR" == 'icmp_req=5' then echo You Rock else echo You Stink fiThis is the error....

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Date comparisons

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File and if statement comparisons

I'd love to get help on this one please. Ok so say I have a file called README with lines such as this: index:index.html required:file1.1:file2.1:file3.1 I'm having trouble with writing an if statement that compares the items in a list with a file inside README, what I imagine in my head...

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Hi, I have 25 groups and I need to perform all possible pairwise compariosns between them using the formula n(n-1)/2. SO in my case it will be 25(25-1)/2 which is equal to 300 comparisons. my 25 groups are FG1 FG2 FG3 FG4 FG5 NT5E CD44 CD44 CD44 AXL ADAM19 CCDC80 L1CAM L1CAM CD44...

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Hi all, I want to compare two files based on column value Kindly help me a.txt 123,ABCD 456,DEF 789,SDF b.txt 123,KJI 456,LMN 321,MJK 678,KOL Output file should be like Common on both files c.txt 123,ABCD,KJI

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String regex comparisons

Here is the sample code: str1="abccccc" str2="abc?" if ]; then echo "same string" else echo "different string" fi Given that ? implies 0 or 1 match of preceding character, I was expecting the output to be "different string", but I am seeing "same string". Am I not using the...

LEARN ABOUT LINUX

pthread_equal

PTHREAD_EQUAL(3)					     Linux Programmer's Manual						  PTHREAD_EQUAL(3)

NAME

       pthread_equal - compare thread IDs

SYNOPSIS

       #include <pthread.h>

       int pthread_equal(pthread_t t1, pthread_t t2);

       Compile and link with -pthread.

DESCRIPTION

       The pthread_equal() function compares two thread identifiers.

RETURN VALUE

       If the two thread IDs are equal, pthread_equal() returns a nonzero value; otherwise, it returns 0.

ERRORS

       This function always succeeds.

CONFORMING TO

       POSIX.1-2001.

NOTES

       The  pthread_equal()  function  is  necessary  because thread IDs should be considered opaque: there is no portable way for applications to
       directly compare two pthread_t values.

SEE ALSO

       pthread_create(3), pthread_self(3), pthreads(7)

COLOPHON

       This page is part of release 3.27 of the Linux man-pages project.  A description of the project, and information about reporting bugs,  can
       be found at http://www.kernel.org/doc/man-pages/.

Linux								    2009-03-30							  PTHREAD_EQUAL(3)

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Script to automate file comparisons

Discussion started by: herman404

2. UNIX for Dummies Questions & Answers

Can grep do numerical comparisons?

Discussion started by: Uss_Defiant

3. Shell Programming and Scripting

numeric range comparisons

Discussion started by: dcfargo

4. Shell Programming and Scripting

Best practice for bracket comparisons?

Discussion started by: tlarkin