Find out how old a web page is

curl -Is | grep Mod
I is for headers only s is for silence curl -Is outputs ONLY headers the pipe and grep is to filter them to Modified only..
Sample Output
Last-Modified: Wed, 08 Feb 2012 20:14:53 GMT

By: Gunni
2012-05-01 21:42:42

1 Alternatives + Submit Alt

  • I used to use the Firefox "View page info" feature a lot to determine how stale the web page I was looking at was. Now that I use mostly Chrome I miss that feature, so here is a command line alternative using wget. The -S says to display the server response, the --spider says to not download any files/pages, just fetch the header. The output goes to stderr, so to grep it you use 2>&1 to combine the stderr stream with stdout, the pipe that to grep for Last-Modified. You can use curl instead if you have it installed, like this: curl --head -s | grep Mod Show Sample Output

    wget -S --spider 2>&1 | grep Mod
    dmmst19 · 2012-04-18 03:43:33 2

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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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