I don't understand progress output

[sebelk]

Hi,
Really progress is a nice idea. But I've tried and I don't understand what it does.

For example:

 progress  -c firefox
[13536] firefox /home/sergio/.local/share/baloo/index
        0.0% (0 / 641.3 MiB)

It always shows the same thing. No matter Firefox does, and does not show anything when download a file.

Could you explain what I am missing of this tool?

Thanks in advance

[Xfennec]

This tool shows the biggest opened file for a process. In your case firefox is opening, for some reason, a 600+MB Baloo file (this is a file indexing tool, AFAIK) and therefore progress is showing this file. If firefox is only reading this file, progress -o w -c firefox will show more interesting things when downloading.

For a begin, to understand the use of progress, It's probably easier to use it with usual commands like cp / dd / … when dealing with big files.