1
vote
2answers
105 views

How to loop through xargs where each script uses a common env variable

Is it possible to initiate 10 of the same shell scripts which also initiate more copies, and have them all use the same env variable? For example: script.sh: #!/bin/bash export ...
0
votes
1answer
47 views

ENV variables in relation to xargs loops

Are env variables (set using export) treated differently when the same script is run multiple times simultaneously? That's a weird question, so here's an example I built out which is similar to my ...
1
vote
2answers
93 views

Use xargs input in eval command [duplicate]

I have a file "commands.php" that dynamically generates bash commands. For example, one line is: # - commands.php ssh me@123.123.123.123 echo "text" > file; reboot; How can I use the output of ...
2
votes
2answers
101 views

xargs loop with input variable for use in multi-command

I have a text file with various IP addresses. I would like to cycle through each, and issue a command: cat ips.txt | xargs -L 1 `ssh me@__IP__ echo "text" > file; reboot;` But I'm unsure how ...
3
votes
3answers
204 views

Weird “No such file” error with “xargs” and “file”

I'd like to get the MIME type of all files under the current directory. Why doesn't this work? I've tested bash on OSX or Linux. "file" complains that it can't find the file, but if I run it with the ...
0
votes
2answers
155 views

Pass flags to xargs

I want to kill a bunch of processes using this command: sudo ps ax | grep node | awk '{print $1}' | xargs kill But it gives me operation not permitted even with sudo. Then I tried with kill -9 ...
2
votes
4answers
264 views

Zgrep stop after first match when arguments are passed from xargs

I'm using this command to find patterns in zip files (similar to the one) suggested here http://superuser.com/questions/144926/unix-grep-for-a-string-within-all-gzip-files-in-all-subdirectories find ...
3
votes
1answer
133 views

Why is `xargs bash -ic echo` not the same thing as `xargs echo` or `xargs`?

I expect the command ls -d doc/* | grep -P "<some_pattern>" | xargs bash -ic echo to do the same as: ls -d doc/* | grep -P "<some_pattern>" | xargs echo that is, to give me the files ...
5
votes
3answers
221 views

Can you pipe to a .bash_profile function?

I received a great function for highlighting files in Apple's finder using the command-line. It's basically a wrapper for osascript. I got it from Mac OS X: How to change the color label of files ...
4
votes
2answers
785 views

Why doesn't this xargs command work?

I wanted to delete all .sh extensions so did this: ls *.sh | xargs -I {} mv {} `basename {} .sh` However it doesn't work, it behaves like basename returns unchanged file name. Why is it behaving ...
2
votes
3answers
391 views

Howto recursively create PDF thumnbails on linux command line

I am able to use ImageMagick to create a thumbnail of the first page of a PDF using: convert -thumbnail x80 95.pdf[0] thumb_95.png This works fine and generates a thumb_95.png file. I have tried ...
8
votes
2answers
222 views

Piping nothing to xargs

I have a script that may in some circumstances have nothing on stdout. At the end of the script, I pass the lines I have to another command using xargs. My problem is, when there is nothing on stdout, ...
4
votes
2answers
1k views

How to delete commands in history matching a given string?

I need to delete all commands in my history matching a string. I've tried: $ history | grep searchstring | cut -d" " -f2 | history -d -bash: history: -d: option requires an argument $ history | grep ...
1
vote
3answers
2k views

Linux: Does find | xargs grep have limitations?

I've historically performed something like: find . 2>/dev/null | xargs grep -i something_to_find 2>/dev/null If my pwd is barfoo (/foo/bar/baz/foofoo/foobar/foobaz/barfoo) it finds matches. ...
1
vote
4answers
502 views

No such file or directory error when using xargs

I have some files with .mkv extension and I want to calculate their total size using du -h. Some of the files are preceded by whitespace characters. ranveer@ranveer:~$ ls *.mkv ...
1
vote
3answers
1k views

how to sum output of awk or other expression with xargs

Suppose i have the following bash shell script: #!/bin/bash export count=0; for i in `ls ./mydoc` ;do pdfinfo ./mydoc/$i | egrep Pages |awk {'print $2'} |xargs -+ $count ; ...
3
votes
4answers
3k views

Passing pipeline value as parameter to xargs for use by eval echo

I have a text file that I'm using as a template, it looks like this: Hostname : $HOSTNAME Host Address : $HOSTADDRESS My bash script sets two variables, HOSTNAME and HOSTADDRESS, reads the ...
6
votes
3answers
2k views

How to open multiple files from `find` output?

I know I can open multiple files found in a dir like so: find -name *.foo -xargs <command> {} \; This works, but when trying to open a bunch of textfiles in gedit at the same time, it opens ...
14
votes
7answers
9k views

Using xargs with input from a file

Say I have a file with the following bob john sue Now these directly corrospond to (in this case) URL pattern such as http://example.com/persons/bob.tar, john.tar, sue.tar. I would like to take ...
10
votes
3answers
2k views

bash find xargs grep only single occurence

Maybe it's a bit strange - and maybe there are other tools to do this but, well.. I am using the following classic bash command to find all files which contain some string: find . -type f | xargs ...