Linux – Regex tool for Linux

For linux you can combine many tools. top (or htop), iotop, etc. You could also install BSD accounting and use the sa command.

You can simply replace the middle number of each line with nothing.

In the editor

That is, in your editor, search-and-replace the regex

,[0-9]+,

(which only matches numbers with commas on both sides, which for your input is just the middle number) with a single comma:

,

I assume Ultraedit supports regex search-and-replace. If not, try Notepad++, which I know does.

From the command line

Since you tagged your question shell-script, here's how to do it from the command-line.

sed

Use sed, a standard Linux command also available for Windows as part of Cygwin or GnuWin32:

C:\>sed -e 's/,[0-9]+,/,/g' filename.txt

Powershell

Jens pointed out that you can also do it in Windows Powershell; see this explanation.