Netstat

Ever wonder what network activity is happening on your machine? Use netstat. The most useful command line options: -a = show all network access -b = shows the process, or on windows the process id that is using the network (the process id can be matched up to a process via the task manager) -n… Continue reading Netstat

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Fixing Fixed-Width Text Files

To remove the end line characters in a text file that has every line truncated at 80 chars… perl -pi -e ‘s/(….+)\r\n/$1 /’ filename.txt perl -pi -e ‘s/\n/\n\n/’ filename.txt Then open in Write –> copy and paste into word.

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Replace Text

Here’s a quick one-liner for perl… replace every occurance of “boring” with “fun”: perl -pi.bak -e ‘s/boring/fun/’ filename.txt

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Recursive Search

I usually use Windows Explorer to find something recursively within a folder hierarchy… but sometimes it doesn’t work based on the file types. When that happens, I fall back to this find + grep combination (available with cygwin utils): find . -type f -exec grep needle {} \; -print It looks for the word “needle”… Continue reading Recursive Search

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