Sponsored Content
Top Forums Shell Programming and Scripting Running md5sum on a list of files Post 302303564 by SDelroen on Friday 3rd of April 2009 02:08:20 AM
Old 04-03-2009
I was reading other posts while waiting for a reply, and found the solution in one of them: xargs.

The right command is:

xargs md5sum < list.txt >md5list.txt
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

What is md5sum???

Hi all, I am kinda puzzled. When and Why do we use md5sum? I've read man pages for mp5sum, but didn't get anything out of it. Please, can someone explain this to me in couple of words. Thank you all. (1 Reply)
Discussion started by: solvman
1 Replies

2. UNIX for Dummies Questions & Answers

the file: MD5SUM

i downloaded a Linux distribution from a FTP site today, and i found there is a file named MD5SUM in the same directory, with the following contents: -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 c9a4d963a49e384e10dec9c2bd49ad73 valhalla-SRPMS-disc1.iso 41b03d068e84d2a17147aa27e704f79b ... (1 Reply)
Discussion started by: samprax
1 Replies

3. Programming

md5sum and execve

Hello there! Is there a way to use execve() to run md5sum function? for example execve("md5sum <filename>, NULL,NULL);" thanx! (2 Replies)
Discussion started by: nicos
2 Replies

4. Shell Programming and Scripting

how to get a md5sum in perl

hi All: i write a adduser script in perl , but I don't know how to deal with the password , for it stored as md5. and i don't use the shell command passwd. give me some advice...thanks (1 Reply)
Discussion started by: kingdream
1 Replies

5. Shell Programming and Scripting

Making a script to copy files not seen before (using md5sum)

Hello, I would like to make a script that searches through a SRC folder and copies only files it's never seen before to a DEST folder. SRC = /user/.phonesync/photos-backup DST = /usr/.phonesync/photos-new So basically, I'd start with a: md5sum /user/.phonesync/photos-backup/* >... (29 Replies)
Discussion started by: nbsparks
29 Replies

6. Shell Programming and Scripting

Md5sum is running very slowly

Hi, I am trying to get the hash values of md5 of a string. I am on Redhat Linux. using the 25-27 field in the file I need to generate the md5 and append it at the end of the record as a new field. I have tried the below code but its painfully slow. can you please suggest any alternatives or... (21 Replies)
Discussion started by: ahmedwaseem2000
21 Replies

7. Shell Programming and Scripting

Compare files in directories with md5sum

And not to start. I can compare files, that's easy. The problem is that I compare files in a directory, and check if these files exist in another directory. The problem is that the file names are not the same. So I have to compare with "md5sum" or something similar. How I can do? All this in... (7 Replies)
Discussion started by: Jomeaide
7 Replies

8. Shell Programming and Scripting

Md5sum on crontab

Hi all, I have to verify the integrity of a ISO image that is downloaded periodically on my PC. In order to do that, I've written a bash script that use the command md5sum with the aim to match the generated code with the default one created with the SIO image. The problem is that, if I start... (1 Reply)
Discussion started by: Mr. Piros
1 Replies

9. Shell Programming and Scripting

Compare two md5sum

Hello, First of all I want to apologize because i'm not a admin or coder and maybe all my efforts to write only this small script in my life would need one week full time reading man pages and forums but... I don't have the money to offer me to get this time and the script I want to do seems... (5 Replies)
Discussion started by: toscan
5 Replies

10. Shell Programming and Scripting

[md5sum] script

I am getting No such file or directory if my variable contains white spaces... Is there a way to fix this? This works x="1.md5" md5sum -c "$x" This, does not x="23\ 5\ 6\ 7\ 8\ 9\ 10.md5" md5sum -c "$x" md5sum: '23\ 5\ 6\ 7\ 8\ 9\ 10.md5': No such file or directory How do I fix... (1 Reply)
Discussion started by: soichiro
1 Replies
XARGS(1)						      General Commands Manual							  XARGS(1)

NAME
xargs - construct argument list(s) and execute utility SYNOPSIS
xargs [ -t ][[ -x ] -n number ][ -s size ][ utility [ arguments... ]] DESCRIPTION
The xargs utility reads space, tab, newline and end-of-file delimited arguments from the standard input and executes the specified utility with them as arguments. The utility and any arguments specified on the command line are given to the utility upon each invocation, followed by some number of the arguments read from standard input. The utility is repeatedly executed until standard input is exhausted. Spaces, tabs and newlines may be embedded in arguments using single (`` ' '') or double (``"'') quotes or backslashes (``''). Single quotes escape all non-single quote characters, excluding newlines, up to the matching single quote. Double quotes escape all non-double quote characters, excluding newlines, up to the matching double quote. Any single character, including newlines, may be escaped by a back- slash. The options are as follows: -n number Set the maximum number of arguments taken from standard input for each invocation of the utility. An invocation of utility will use less than number standard input arguments if the number of bytes accumulated (see the s option) exceeds the specified size or there are fewer than number arguments remaining for the last invocation of utility. The current default value for number is 5000. -s size Set the maximum number of bytes for the command line length provided to utility. The sum of the length of the utility name and the arguments passed to utility (including /dev/null terminators) will be less than or equal to this number. The current default value for size is ARG_MAX - 2048. -t Echo the command to be executed to standard error immediately before it is executed. -x Force xargs to terminate immediately if a command line containing number arguments will not fit in the specified (or default) command line length. If no utility is specified, echo(1) is used. Undefined behavior may occur if utility reads from the standard input. The xargs utility exits immediately (without processing any further input) if a command line cannot be assembled, utility cannot be invoked, an invocation of the utility is terminated by a signal or an invocation of the utility exits with a value of 255. The xargs utility exits with a value of 0 if no error occurs. If utility cannot be invoked, xargs exits with a value of 127. If any other error occurs, xargs exits with a value of 1. SEE ALSO
echo(1), find(1) STANDARDS
The xargs utility is expected to be IEEE Std 1003.2("POSIX") compliant. June 6, 1993 XARGS(1)
All times are GMT -4. The time now is 02:29 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy