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linuxnginxsignals

How to send USR2 signal?

I read that to upgrade nginx involves among other things sending the USR2 signal with kill -USR2 pid. So I tried sudo kill -USR2 3049 but got 

$ sudo kill –USR2 3049
kill: failed to parse argument: '–USR2'
Solution

  • I was copy pasting from a website and that caused the wrong dash to be used.

    sudo kill –USR2 3049

    vs the correct dash (hypen):

    sudo kill -USR2 3049