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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19 views

xargs misinterprets backslashes on windows

I am using gnuwin32 utilities on windows 7. I want to pipe a file list to xargs to remove the files. but if i pipe normal windows paths in then xargs interprets and removes the backslashes dir /B ...
2
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1answer
20 views

why doesn't `find . -name '*.jar' | xargs jar tf` work?

I ran this find . -name '*.jar' | xargs jar tf hoping it would, find all the .jar files and execute jar tf on them (to view the content). But it didn't seem to work!!!
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2answers
32 views

Pass all *.txt files to a Python script in parallel

I have a Python script that takes a .txt file and does something with it. I need a Linux shell command that will search for .txt files throughout the system and pass the .txt files to my Python ...
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1answer
29 views

Delete files if condition is met

I have the following directory tree: /Directories/ /Directories/somedir/somefile.mkv /Directories/somefile.rar I'm trying to find a way to delete the .rar file if the .mkv file exists and is larger ...
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1answer
34 views

What does xargs do exactly in this case?

I recently came across the following two examples Example 1: List only directories ls -l | grep "^d" Example 2: Search inside files ls | xargs grep -i "Find Some String" Now i have read from ...
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44 views

execute a command for each line of stdin immediately?

How do I execute a command for each line of stdin immediately? Example: (echo abc; sleep 10; echo def;) | ??? The xargs tool does not do the job because it blocks until it sees all the data (waits ...
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36 views

When to use `xargs`?

In what kind of situation can xargs be used? And when would it be considered pragmatic to do so?
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25 views

Retrying failed command that is run with xargs

I have a script that rsync's files over in parallel using xargs and rsync daemon mode. I occasionally get errors with rsync due to writes happening on the source. I want to be able to retry the rsync ...
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17 views

How can I get xargs -I to work with large strings

Here's a contrived usage of xargs that I'm running on Mac OS X: $ head -c 128 /dev/urandom | openssl base64 -A | xargs -I {} echo {} ...
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44 views

remove pattern with random numbers (digits) from php files

I am trying to remove or replace the digits ((random numbers)) in big numbers of php files using find & xargs and grep with sed etc .. the numbers looks like that inside the php file ...
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1answer
17 views

remove wayback toolbar code in bewteen lines

I am trying to remove Wayback toolbar code using some tools such as find & xargs and grep with sed etc issue that the size of the html & php files it's over 7GB & as well as the pages ...
0
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1answer
69 views

how to move files that contain string using find, xargs, grep, in linux

i have many php files maybe over Three million.. how can i use grep with xargs and find with mv to find contain the string in files and move them to directory if they match. I try like that find . ...
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26 views

fswatch does not pass arguments to xargs

I'm starting using fswatch on os x. I've read tutorial, but example from there does not work for some reason. I'm executing fswatch /$HOME/Projects/utils/configs/.vimrc | xargs -0 -n 1 -I {} echo {} ...
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1answer
181 views

Delete all not jpeg files

I have exercise, in which I have to delete all files, which are not jpeg. I tried find -type f |xargs file| grep -iv 'jpeg', but it doesn't work.
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2answers
26 views

How can I find a particular named file within a particular named directory that could be anywhere in file system?

I am trying to find a file within a directory where both the name of the file and the name of the directory are known. For example, say I want to find "...don't know this part of file path ...
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1answer
47 views

How to store data from different netcat connections in separate files?

I need a server that should receive data streams, store them in files and send further. Each connection should create a file with corresponding timestamp in file name, then write to it. My solution: ...
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3answers
103 views

add new line after every end of file's contents while merging multiple files

I have written shell script to merge different file's contents I have created directories f1,f2,d1,d2 and files under them , I need to merge all files's contents : comand is (find /home/ah5024331/f1 ...
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2answers
38 views

Can xargs evaluate $HOME?

When I type in echo $HOME/Downloads | xargs cd It correctly changes directory to $HOME/Downloads. Maybe that is because echo evaluates $HOME before piping to xargs. However if I type echo ...
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1answer
120 views

How would one pipe from socat to sed to bc to xargs?

I have a server outputting some numbers, I'm reading them with socat, then using sed, I turn those numbers into some math equations, I run them with bc, then I need to pipe them into xargs. socat -u ...
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2answers
107 views

Xargs: change working directory to file path before executing?

I have a large folder of RAR archives. There is a significant hierarchy of folder levels. I want to unRAR the entire collection of archives all at once. I have the following one-liner, which will ...
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1answer
89 views

Is there any difference between -exec cmd {} and xargs -I?

Normally, xargs bundles everything together, but when used with the -I flag it seems to put evaluate everything as a single line. Does this mean it loses its speed advantage? Also if the -exec cmd {} ...
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2answers
92 views

find/xargs, filenames with spaces, and quotes

I'm looking for a way to get find and xargs (GNUWin32, under Win7, both programs at version 4.1) to play along, with filenames that contain spaces. Getting the filenames into xargs as one was one ...
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94 views

How can I use xargs replace but keep space delimiter?

Consider the following xargs usage: echo Alice Bob Carol | xargs -n1 echo It produces three echo statements like this echo Alice echo Bob echo Carol Consider this modified xargs usage: echo ...
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212 views

Chronologically grep or zgrep files in folder depending on file extension (xargs)

I have dozens of folders which contains both plain text log files and gzipped older logs. My goal is just a one liner to run (one folder at a time) to pull up all grep results based on timestamp ...
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1answer
922 views

Getting xargs: unterminated quote when trying to find text in files

I'm using Mac 10.9.5 with bash shell. I'm trying to search for instances of text within a group of files, but for some reason, in one particular directory, I get this bizarre "Unterminated quote" ...
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97 views

Move most recently modified file

I am trying to move the most recently modified file in "Pictures/". This is what I've tried: find Pictures/ -maxdepth 1 -type f -mmin -60 -print0|tail -1| xargs -0 -I {} mv "{}" Dropbox/somefolder/ ...
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1answer
169 views

`if` statement with stdout && passing xargs through pipe

Say I have a list.txt of files I want to check. cat list.txt and for each file, I want to perform an action cat list.txt | xargs -I {} touch {} But depending on the outcome of the action, I want ...
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1answer
53 views

How to copy a list files to a list of directories or subdirectories

I'm trying to figure out how to copy a list of files to a list of subdirectories. eg. I have 300 files to copy into 300 subdirectories - 1 to 1. file1 -> dir1/sub file2 -> dir2/sub file3 ...
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159 views

xargs + pv = messed up terminal

if i want a little progress indicator on my long-running operation i can use pipeviewer: ssh pc2 cat some.file | pv -nC reading | gzip --fast | pv zipping > some.file.gz this gives me a fun ...
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1answer
74 views

Using xargs with $() - operator precedence?

Inspired by this question. The original question, in short, is "How to turn all :2f into - in all files within a folder". e.g. If I have a file ./abc:2fdef it should be renamed into ./abc-def. At ...
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261 views

Why doesn't xargs on find work with a series of commands using pushd and popd to walk a directory subtree?

On a Linux Centos 4 machine, I am trying to create a simple bash command line to walk a directory structure below an arbitrary current directory and in each subdirectory touch a file, list the ...
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2answers
505 views

How can I run mogrify over the 3 million JPG files?

I have 3 million JPG files stored in a Linux CentOS 6 server. I want to change quality to %50 file size over 1 megabyte. I wrote this command but got an "argument list too long" error: $ find -type ...
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1answer
569 views

Find & du to calculate total size vs xargs

Can someone confirm that the following one liner will produce the total human readable size of all the directories which FIND locates as having log in the name? find -type d -name *log* | du -hcs
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1answer
58 views

xargs process string as multiple arguments

Linux GNU xargs I have the file doit with arg1 arg2 arg3 arg4 arg1 arg2 arg3 arg4 I want to perform command arg1 arg2 arg3 arg4 command arg2 arg2 arg3 arg4 What I can't figure out is how to ...
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2answers
56 views

Find two newest change files and compare them

I have a script that wgets a .txt file and datifies the names. I'd like to diff the changes between the newest & next-to-newest file. This is how I am able to select them: ls -t -l | awk ...
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3answers
310 views

xargs substition of more than one argument

By default xargs will concatenate many lines of its input and pass then to the specified command. For example: echo -e 'line 1\nline 2\nline 3' | xargs echo results in line 1 line 2 line 3 ...
3
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2answers
2k views

cat “input file is output file” while trying to combine multiple files into one

The plan was to collect all source lines of Java into one file, recursively: $ find . -name '*.java' | xargs cat >> all.java But there was an error: cat: ./all.java: input file is output ...
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2answers
361 views

Detect invalid JSON files in directory tree

I want to fail a build if the directory tree contains a JSON file which is invalid according to the jsonlint package from NPM. I thought this would be as easy as running: find . -name \*.json | ...
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2answers
447 views

batch find/replace using sed or awk

In every file with filename matching pattern1 I want to search for lines which start with pattern2, and add some string in a new line above those matched lines. As a simple example suppose I'm ...
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2answers
208 views

How do I search for a string in a group of files when some of those files contain spaces?

I'm running Mac 10.7.5. In a terminal, I'll use this command for finding files with strings find src/main -name "*" | xargs grep -i 'mystring' However when the files contain spaces, I'll get ...
1
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2answers
157 views

Unhide all .htaccess files on mac

I am trying to unhide all the .htaccess files in my home folder. Below I've pasted what I'm using now, but it isn't working. find ~/ -iname ".htaccess" | xargs chflags nohidden "{}" Anyone knows ...
5
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1answer
2k views

xargs -I replace-str option difference

From my understanding, the following should mean exactly the same: ls -1 | xargs file {} ls -1 | xargs -I{} file {} if -I option is not specified, it is default to -I{}. I want to list all files ...
4
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1answer
87 views

Trying to understand xargs

The target is not to list temp/run*.* files. The target is to understand why the second command does not work. First command: find . \( -name 'temp' \) -print0 | xargs -0 -L 1 -I datafind ls -ltr ...
2
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2answers
121 views

Opening search results with Vim ONLY if they exist

:) In my never-ending effort to get lazier, I am looking for a way to improve my "Open Grep/Ack-results in Vim"-snippet. What I'm currently using to open found files is: vim $(ack -il "pattern") ...
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1answer
597 views

xargs with shell function doesn't work

I'm using shell function like zip0 () { zip -0rq "$1" "$1"; } And I wanted to use it with xargs like this. $ seq 1 3 | xargs zip0 xargs: zip0: No such file or directory But as the error message ...
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1answer
355 views

xargs in shell script

I want to group jpeg images by odd number and even number. So I did like following: $ mkdir odd $ mkdir even $ find . -regextype posix-egrep -regex ".*[13579].jpg$" -print0 | xargs -i -0 mv {} odd/ $ ...
6
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1answer
9k views

How can I avoid the “grep: Argument list too long” error?

I'm using Mac 10.7.5 and on a bash shell. I'm trying to find instances of a string in a group of files but keep getting this error Daves-MacBook-Pro:folder davea$ find . -name "*" | xargs grep ...
6
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1answer
791 views

xargs --replace/-I for single arguments

I'm trying to use xargs to run a command for each provided argument, but unfortunately the --replace/-I flag doesn't seem to work properly when conjugated with -n. It seems that {} will expand into ...
0
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3answers
552 views

Using xargs with find

I want to exclude some directories from searching files and than run the find command to find required files. I am using below command find . -maxdepth 1 -type d | grep -E -i 'sensors' | grep -v ...
4
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2answers
460 views

Running find and xargs in background

I want to run this command in background because the process could take a long time. How can I send it to a background process? find /tmp/ -type f -mtime +3 | xargs rm -Rf This does not work: find ...