How can I have kdb automatically load q code at startup in every session?

Every time you start q, it looks for a file called q.q (in $QHOME, if defined, or current working directory otherwise). If q finds q.q, it will execute it before presenting a prompt or calling any script you provided on the command line.

If you want to call the file something else, or keep it separate from your q installation, you can set the environment variable QINIT to the path to your initialization file.

It is also possible to add k code to q.k (which will be executed before q.q), although we’ve never needed to.

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