2
votes
2answers
139 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 ...
1
vote
2answers
59 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 | ...
4
votes
1answer
63 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 ...
6
votes
1answer
207 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
votes
3answers
197 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 ...
2
votes
3answers
629 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 ...
0
votes
2answers
401 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 ...
0
votes
3answers
206 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 ...
8
votes
6answers
4k 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 ...
1
vote
3answers
8k views

ls -rt (How to list just THE LAST file? e.g. for: | xargs gnome-open)

e.g. directory containing jpeg files: how to easily open just the most recent jpeg in the current directory?
1
vote
3answers
2k views

xargs vs backtick

More silly questions from the Linux n00b. =D I'm curious about the performance ramifications of using xargs vs. backticks. For example, what's the different between: find ./ -name foo* | xargs rm ...
7
votes
4answers
7k views

find: -exec vs xargs (aka Why does “find | xargs basename” break?)

I was trying to find all files of a certain type spread out in subdirectories, and for my purposes I only needed the filename. I tried stripping out the path component via basename, but it did't work ...