Keep track of diff progress

watch -d "ls -l /proc/$!/fd"
You're running a program that reads LOTS of files and takes a long time. But it doesn't tell you about its progress. First, run a command in the background, e.g. find /usr/share/doc -type f -exec cat {} + > output_file.txt Then run the watch command. "watch -d" highlights the changes as they happen In bash: $! is the process id (pid) of the last command run in the background. You can change this to $(pidof my_command) to watch something in particular.
Sample Output
Every 2.0s: ls -l /proc/4958/fd                                                                                                                   Fri Jan 31 23:44:07 2014

total 0
lrwx------. 1 flatcap flatcap 64 Jan 31 23:43 0 -> /dev/pts/3
l-wx------. 1 flatcap flatcap 64 Jan 31 23:43 1 -> /home/flatcap/output_file.txt
lrwx------. 1 flatcap flatcap 64 Jan 31 23:43 2 -> /dev/pts/3
lr-x------. 1 flatcap flatcap 64 Jan 31 23:43 3 -> /usr/share/doc/


1
By: flatcap
2014-01-31 23:51:17

1 Alternatives + Submit Alt

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Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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