Null: Difference between revisions
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The null device | The null device located in /dev/null discards any data written to it. It's a black hole that eats everything that is sent to it. Unwanted output in shells can be redirected to /dev/null. Here is an example crontab where /dev/null is used to prevent emails from being sent: | ||
*/5 * * * * /usr/local/bin/fetchmail > /dev/null 2>&1 | */5 * * * * /usr/local/bin/fetchmail > /dev/null 2>&1 | ||
Latest revision as of 08:02, 25 October 2005
The null device located in /dev/null discards any data written to it. It's a black hole that eats everything that is sent to it. Unwanted output in shells can be redirected to /dev/null. Here is an example crontab where /dev/null is used to prevent emails from being sent:
*/5 * * * * /usr/local/bin/fetchmail > /dev/null 2>&1
