utility in Unix-like operating systems for passing large numbers of arguments to programs that can only take a small number of arguments

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248 views

Having trouble piping output of dscl -list to -dscl read using xargs

I'm trying to get every user using dscl and reading each of their records using xargs and dscl. I'm not sure what I'm doing wrong, though, because I would expect this command to take each line of ...
2
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3answers
5k views

Argument list too long for xargs/exec

I'm working on a CentOS server and I have to move around and cat together millions of files. I've tried many incarnations of something like the below, but all of them fail with an argument list too ...
4
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3answers
612 views

Spawning multiple parallel wgets and storing results in a bash array to be pretty printed when all wgets are done

I have a long list of urls on my own website listed in a carriage return seperated text file. So for instance: http:/www.mysite.com/url1.html http:/www.mysite.com/url2.html ...
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2answers
2k views

Why is xargs necessary?

Suppose I want to remove all files in a directory except for one named "notes.txt". I would do this with the pipeline, ls | grep -v "notes.txt" | xargs rm. Why do I need xargs if the output of the ...
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3answers
478 views

Use xargs to send requests to the same server in parallel with netcat

I am trying to devise a one-liner to send text to a simple echo server - but multiple connections in parallel. This is what I'm trying: echo -e A,B,C,D | xargs -d, -i -P 4 echo {} | nc localhost ...
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3answers
95 views

How to call the names of directories after passing them all to xargs?

I'm using find to pass all directories to xargs, and the command on each dir by xargs needs to create a new directory for each, looking like dirname_a, so how can this be done? ie find . -type d ...
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3answers
225 views

Using Xargs with hocr2pdf

I'm trying to use tesseract and hocr2pdf on a series of .tif files in a folder. Using ls *.tif | xargs -I% tesseract % % -l fra hocr produces the html files which have the same file name but with ...
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1answer
72 views

Why doesn't this xargs + grep combo work properly?

I have two files, team1.txt and team2.txt team1.txt =========== Alex Bob Charlie David team2.txt =========== Alex Charlie Benjamin Zed Noah I want to output the people who are in both team1 ...
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2answers
4k views

Redirect strace to file

Am trying to trace apache2. These are the commands i'm trying to run. ps auxw | grep sbin/apache | awk '{print"-p " $2}' | xargs strace >> trace.txt I tried (ps auxw | grep sbin/apache | awk ...
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2answers
2k views

xargs -I behaviour

A variable var contains multiple arguments, each split by a new line. echo "$var" | xargs -I % echo ABC % #Results in: #ABC One #ABC Two #ABC Three However, when omitting -I and the % characters, I ...
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3answers
1k views

Why doesn't piping grep output into xargs work with color?

I have a strange issue. My grep has colored output, and if I do something like this: grep -lr '80' /etc/apache2/sites-available/|xargs ls I got: ls: cannot access ...
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2answers
92 views

Change attributes of all symlink targets in a directory

How to change attributes of all symlink targets inside a directory ? /usr/bin/find /mydir -type l | xargs /bin/readlink | /usr/bin/chattr +s piping three commands wont works. Thanks.
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3answers
428 views

Using find, xargs, etc. to output similarly named files

I have a folder full of HTML files: 001.htm 002.htm 003.htm … I want to run Pandoc on them to convert them to similarly named Markdown files: 001.md 002.md 003.md This command works on one of ...
0
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1answer
513 views

Use java and xargs(?) to supply only arguments to java program and not replace stdin

I have a written a small java program that takes arguments from the commandline and should then be interactive. When I want to test with large input I want to pipe the contents of a file to the JVM ...
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3answers
1k views

sudo to kill output of ps, awk, xargs

I want to kill root owned processes containing foo in the process name sudo sh -c "ps aux | grep [f]oo | awk '{print $2}' | xargs kill -15" this command fail as awk and xargs are ignored. sudo sh ...
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3answers
631 views

piping output of find to xargs wc gives unreasonable totals

In a project with thousands of files, I wanted to compare total lines-of-code, to lines-of-code just in PHP (discarding CSS, JS, etc). When I run find . -type f | xargs wc -l I the total on the ...
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5answers
10k views

How can i move files with xargs in linux

I am trying this and its not working ls file_* |xargs mv {} temp/ Any ideas
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3answers
2k views

what is diff bentween xargs with braces and without in linux

I want to know what is the difference between this ls | xargs rm ls | xargs -i{} rm {} Both are working for me
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2answers
641 views

cURL or xargs: show progress

I am using cURL to download many files and concatenate them to STDOUT. About 100,000 small files. I would like to see progress against the 100,000. Is this possible with curl or by using curl into ...
4
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2answers
2k views

How to use wildcards in a xargs-command?

I've got a directory with numbered files, e.g. 1_foo.txt 2_bar.asc 13_test.png, and want to move them into individual directories (e.g. 1, 2 and 13) using as simple a bash command as possible. ...
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3answers
947 views

Create multiple files and name them from command line

I need to create 300 blank files and put them in a folder on my server then name them from a list in a txt file, I have SSH access, so is it possible to do this using command line?
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4answers
188 views

how to do grep in the man command of linux using xargs?

I want to grep into a manual of a particular command say man grep |grep 'insensitive'. One of friends told me that It can be done using xargs but I cant seem figure out how. I want to do it using ...
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3answers
756 views

Difference between xargs /bin/ls and exec ls?

Hi this may be a very newbie question, but why doesnt the xargs /bin/ls work in this case? I thought it was supposed to be faster? Also what are those /fd/3 directories? sh-3.2# find / -name 'GOALS*' ...
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2answers
276 views

find -print0 | xargs -0 grep not working as expected on Ubuntu 10.04

I've got a bit of a weird issue. If I run: find . -iname '*.php' -o -iname '*.pl' -o -iname '*.html' | xargs grep -i users I get a load of errors for filenames containing spaces, but also some ...
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2answers
682 views

xargs and cp: find-style “{}+” multiple expansion?

I'd like to copy a group of files to destination folder. But without needing to spawn a new instance of cp for each operation. The arg format for cp seems to be: cp src_file1 src_file2 src_file3 ...
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1answer
1k views

grep, xargs, sed to clean up PHP eval hack

I'm attempting to use the commands found on http://devilsworkshop.org/tutorial/remove-evalbase64decode-malicious-code-grep-sed-commands-files-linux-server/55587/ to clean up a PHP eval based hack on a ...
0
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3answers
464 views

Passing multiple sets of arguments to a command

instances contains several whitespace separated strings, as does snapshots. I want to run the command below, with each instance-snapshot pair. ec2-attach-volume --instance $instances --device ...
2
votes
3answers
588 views

Xargs string interpolation, not by inserting a space

I want to repeat touch ../template/filename where filename comes from find. I want xargs to apply the touch operation, but I dont want it to insert a space like it usually does which derives into: ...
6
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3answers
3k views

Replacement for xargs -d in osx

In Linux, you can use xargs -d, to quickly run the hostname command against four different servers with sequential names as follows: echo -n 1,2,3,4 |xargs -d, -I{} ssh root@www{}.example.com ...
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3answers
778 views

xargs argument redirection

This seems to be a trivial problem but the solution eludes me ever so cautiously. I want to clear out many text files; log files. Reason? To save on disk space. With one text file, this is as ...
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1answer
271 views

Control mplayer ran by xargs

I feed mplayer with file list from another command: beet ls somequery -p | xargs -d '\n' mplayer When invoked this way, mplayer doesn't react on any standard keys, all I can do is to C-c interrupt ...
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2answers
127 views

Issue using xargs in Linux

I am attempting to pipe the output from youtube-dl to xargs as I would like to name the downloaded file with the title extracted from the first command. however am having trouble doing so. The command ...
0
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3answers
4k views

Using xargs with mv and mkdir command in Linux

I am attempting to create a directory using the command mkdir. However, I would like to move a subset of files into that directory. I understand I can use xargs, however my attempts have failed. For ...
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2answers
742 views

xargs split incoming line

I have a file with two columns separated by spaces like this: potato 5 apple 7 pretzel 9 I want to issue a command on each line like this: cmd -f potato -n 5 cmd -f apple -n 7 cmd -f pretzel -n 9 ...
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6answers
10k views

Pipe output of awk to kill -9

I'm trying to kill any process that has to do with mysql. I'm piecing together a command, and so far, haven't come up with the right solution. One other consideration, is that the last process will ...
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1answer
3k views

Executing lines of a file with xargs, using stdout redirection

I have a file that has lines that look like this: "http://api.domain.com/path/to/resource?format=json" > output.xml and I execute the following from my command line: cat file | xargs -L 1 -I {} ...
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1answer
805 views

Using a Linux/Unix terminal to copy many files to a new location

I'm trying to use the a Linux terminal to copy many files to a new location. I tired the command: sudo locate -i *file_I_want* | xargs cp $1 /place_I_want_everything_copied_to/ Which, gives an ...
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2answers
165 views

flexible number of agruments with xargs

Is it possible to specify the number of arguments that xargs takes without doing it explicitly with -n option, but implicitly with a delimiter, so that the single parameters would be delimited with a ...
10
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7answers
9k views

How can I use two parameters at once with xargs?

I need to convert videos but I don't know where are they, so I need to find them. How can I give the result and an output file name to ffmpeg with xargs ? I already find out that I can construct the ...
5
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2answers
6k views

using John the Ripper to recover RAR password

Testing John the Ripper in Mac OS X as a RAR password recovery solution, but xargs gives me an error: john --incremental:all --stdout | xargs -I jtr unrar e -pjtr -inul test2.rar | grep 100% xargs: ...
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3answers
2k views

Run xargs on the first word on a line

Is there a way to run xargs on only the first argument of a line? So if my input is the default output from a grep, like this: ./file1 "matching string" ./file2 "matching 2" What I want ...
2
votes
2answers
369 views

xargs touch followed by second command

I am randomly selecting files from a directory that I want to process, and I want to apply the touch command to them so that I know the last one that's been visualized, then apply the visualization ...
0
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1answer
80 views

How do I grep for foo && !bar?

I want to output all the lines in my source code which contain the string foo but don't contain the string bar. I tried this: find . -name "*.[hc]pp" | xargs grep -n foo | grep -x bar However ...
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1answer
6k views

Create symlinks recursively for a whole tree

I am seeking for a command that would re-create a whole tree of files in a different directory. I would prefer to have all symlinks absolute. Can I do that with a find and xargs? ;-)
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3answers
2k views

combining sed with xargs to obtain a source and output file name

I have a situation where I have some input files like this: M2U0001.MPG M2U0180.MPG And I want to run a command (in a bash shell) on each similarly named file in the directory. I'd like the ...
1
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2answers
855 views

File name with spaces piped to two xargs commands

I have a directory and many more subdirectories like the following - file with spaces.txt filewithsuperlonglines.txt ordinaryfile.txt binaryfile.bin The command - find . -type f -print0 | ...
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2answers
1k views

Remove all except one file and directory at path

I need to remove all the files in a directory except for one file and one folder. Up to the grep I can output the correct list of items I want to remove but when i add xags, nothing is deleted. this ...
0
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1answer
379 views

find xargs and curl give an error with -C- option

This command works fine find ~/mypath -name *.fstq -print|xargs curl -u sdd:dsdsd ftp://ftp.dsdd.nsdh.com/sdsds/ -T but when I add find ~/mypath -name *.fstq -print|xargs curl -C- -u sdd:dsdsd ...
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2answers
321 views

Efficiently stripe incoming one-word lines onto columns?

Consider a stream of one-word lines such as the stdout of $ echo foo bar baz quux xyxxy thud | tr ' ' '\n' foo bar baz quux xyxxy thud I say "one-word" to indicate there is no whitespace other than ...
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2answers
184 views

Can I simulate ack by using grep with the right combination of options?

I have ack-grep installed on my local machine, and find it indispensable for quickly 'acking' through a codebase when debugging. However, on my cheap shared hosting, there is no ack-grep. One of the ...