incron is an "inotify cron" system. It consists of a daemon and a table manipulator. You can use it a similar way as the regular cron. The difference is that the inotify cron handles filesystem events rather than time periods.
Activation and autostart
After installation, the daemon will not be enabled by default. You can enable
Incrontabs should never be edited directly; instead, users should use the incrontab program to work with their incrontabs.
To view their incrontabs, users should issue the command:
$ incrontab -l
To edit their incrontabs, they should use:
$ incrontab -e
To remove their incrontabs, they may use:
$ incrontab -r
To reload incrond, use:
$ incrontab -d
To edit another user's incrontab, isue the following command:
# incrontab -u user -e
Each row in an incrontab file is a table that the dameon runs when an event happens to a certain directory or file.
The basic format for an incrontab is:
path mask command
- path is the directory or file that incrond will monitor for changes.
- mask is the type of filesystem event that incrond will monitor for. This paramter can be seperated by commas.
- command is the commmand to be run after the specified filesystem event(s) occur.
incrontab uses mask types to specify which file system event to monitor for. For more options see inotify(7)
To trigger a command if a file is accessed or read:
To trigger a command if metadata of a file change (e.g. timestamps, permissons):
To trigger a command if a file opened for writing is closed:
To trigger a command if a file or directory not opened for writing is closed:
To trigger a command if a file or directory is created in a watched directory:
To trigger a command if a file or directory is deleted from a watched directory:
To trigger a command if a watched file or directory is deleted (or moved to a different filesystem):
To trigger a command if a file was modified:
To trigger a command if a watched file or directory is moved within the filesystem:
To trigger a command if a file or directory is moved out of the watched directory:
To trigger a command if a file or directory is moved to the watched directory:
To trigger a command if a watched file or directory is opened:
Custom Mask Types
Incrond provides additional custom event types to modify its monitoring behavior.
For instance, to pause monitoring an event until the current one is completely handled, add loopable=true to the event list, eg:
An event with the loopable event enabled will not fire again until the associated command exits.
See incrontab(5) for the complete list of custom mask types.