The thing with while loops is that they tend to process one item at a time, often when it’s unnecessary. This is where xargs has an advantage – it can batch up the arguments to allow one command to process lots of items. For example, a while loop: pax> echo ‘1 2 3 4 5’ … Read more
Aliases are shell-specific – in this case, most likely bash-specific. To execute an alias, you need to execute bash, but aliases are only loaded for interactive shells (more precisely, .bashrc will only be read for an interactive shell). bash -i runs an interactive shell (and sources .bashrc). bash -c cmd runs cmd. Put them together: … Read more
With BSD xargs (for OS X and FreeBSD), you can use -J which was built for this: find . -name some_pattern -print0 | xargs -0 -J % mv % target_location That would move anything matching some_pattern in . to target_location With GNU xargs (for Linux and Cygwin), use -I instead: find . -name some_pattern -print0 … Read more
In general xargs is used like this prog | xargs utility where prog is expected to output one or more newline/space separated results. The trick is that xargs does not necessarily call utility once for each result, instead it splits the results into sublists and calls utility for every sublist. If you want to force … Read more
This can be also be done with xargs and sed to change the file extension. ls | grep \.png$ | sed ‘p;s/\.png/\.jpg/’ | xargs -n2 mv You can print the original filename along with what you want the filename to be. Then have xargs use those two arguments in the move command. For the one-liner, … Read more
There’s a little-used option for cp: -t destination — see the man page: find . -iname “*.SomeExt” | xargs cp -t Directory
Try: printf %b ‘ac s\nbc s\ncc s\n’ | xargs -d ‘\n’ bash /tmp/test.sh You neglected to quote the \n passed to -d, which means that just n rather than \n was passed to xargs as the delimiter – the shell “ate” the \ (when the shell parses an unquoted string, \ functions as an escape … Read more
Your command should actually work if you add the -y | –yes flag to pip 🙂 -y, –yes Don’t ask for confirmation of uninstall deletions. Possibly: % pip freeze | grep pyobjc-framework | xargs pip uninstall -y
This seems to work for me: LANG=C grep –only-matching –byte-offset –binary –text –perl-regexp “<\x-hex pattern>” <file> short form: LANG=C grep -obUaP “<\x-hex pattern>” <file> Example: LANG=C grep -obUaP “\x01\x02” /bin/grep Output (cygwin binary): 153: <\x01\x02> 33210: <\x01\x02> 53453: <\x01\x02> So you can grep this again to extract offsets. But don’t forget to use binary mode … Read more
You could also simply use find “-printf”, as in : find . -printf “\”%p\” ” | xargs your_command where: %p = file-path This will surround every found file-path with quotes and separate each item with a space. This avoids the use of multiple commands.