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Add up a column of numbers at the Unix shell
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391
... | paste -sd+ - | bc
is the shortest one I've found (from the UNIX Command Line blog).
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Allow user to set up an SSH tunnel, but nothing else
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Check if a string is a date value
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edited Jan 12 '16 at 23:55
Marco Bonelli
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How do I find an element that contains specific text in Selenium Webdriver (Python)?
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Node.js version on the command line? (not the REPL)
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What are the key differences between Scala and Groovy? [closed]
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James IryJames Iry
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What are the uses of the exec command in shell scripts? [closed]
...hat the ksh is not a login-shell).
Just to save processes. If we call prog1 -> prog2 -> prog3 -> prog4 etc. and never go back, then make each call an exec. It saves resources (not much, admittedly, unless repeated) and makes shutdown simplier.
You have obviously seen exec used somewhere...