To disable an existing ENTRYPOINT, set an empty array in your docker file ENTRYPOINT [] Then your arguments to docker run will exec as a shell form CMD would normally. The reason your ENTRYPOINT [“/bin/sh”, “-c”] requires quoted strings is that without the quotes, the arguments to ls are being passed to sh instead. Unquoted … Read more
Try defining a function in ~/.profile. function greplogs(){ grep “$1” */logs/*.log }
It goes a little like this: install -d -m 0755 -o someuser -g somegroup /dir/dir2
you can use tail excerpt from the manpage: -n, –lines=K output the last K lines, instead of the last 10; or use -n +K to output lines starting with the Kth for example tail -n +10 file outputs the files content starting with the 10th line
Remove ^M control chars with perl -i -pe ‘y|\r||d’ script.pl
On UNIX-like systems, you should always start scripts with a shebang line. The system call execve (which is responsible for starting programs) relies on an executable having either an executable header or a shebang line. From FreeBSD’s execve manual page: The execve() system call transforms the calling process into a new process. The new process … Read more
% (sh myscript.sh 3>&2 2>&1 1>&3) 2>/dev/null I’m stderr % (sh myscript.sh 3>&2 2>&1 1>&3) >/dev/null I’m stdout Explanation of 3>&2 2>&1 1>&3: 3>&2 means make a copy of file descriptor 2 (fd 2) (stderr), named fd 3 (file descriptor 3). It copies the file descriptor, it doesn’t duplicate the stream as tee does. 2>&1 … Read more
I think trap 0 is executed just prior to script termination in all cases, so is useful for cleanup functionality (like removing temporary files, etc). The other signals can have specialized error handling but should terminate the script (that is, call exit). What you have described, I believe, would actually execute cmd twice. Once for … Read more
Use xargs: xargs -P <maximum-number-of-process-at-a-time> -n <arguments-per-process> <command> Details here.
Try this: $ echo oneone oneone $ !!:gs/one/two/ # Repeats last command; substitutes ‘one’ –> ‘two’. twotwo