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Jan 072010

Meaning of 2>&1 in crontab


It is quite common to find the following line in crontab

32 5 * * * root /project/ >> /dev/null 2>&1

The meaning of 2>&1 at the end of line means to redirect the standard error stream (stderr) to the standard out stream (stdout), and finally redirect everything to /dev/null.

It is commonly used in crontab definition so if a given command return too much warnings, it will not be logged anywhere in the system in order to reduce the storage requirements.

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