Triggering Action












0















I would like to execute an action when an even occur. More exactly, I would like some file to be edited, every time the "auth.log" changes.
For example : Somebody switch into root mode, that will be written into auth.log, and as result of this change in log, file "abc" will be edited to contain current count of rows in auth.log. This would trigger every time, the log got changed.










share|improve this question























  • Sounds like a task for inotifytools, especially inotifywait.

    – PerlDuck
    Feb 4 at 18:07











  • Thank you for answer. I tried to install it, but it showed error, that some libraries are not "installable".Do you know how can I deal with it ?

    – John Ronald
    Feb 4 at 18:21













  • @PerlDuck please don't post answers as comments. John, now that you have tried inotify, please edit your question and include what you tried and how it failed.

    – terdon
    Feb 4 at 20:23











  • I've used inotifywait and inotifywatch, BUT check the filesystem type where the file lives. They don't work on overlayfs, for example. apt-cache search inotify shows many choices, including entr - Run arbitrary commands when files change. I have NOT tried this.

    – waltinator
    Feb 4 at 21:52
















0















I would like to execute an action when an even occur. More exactly, I would like some file to be edited, every time the "auth.log" changes.
For example : Somebody switch into root mode, that will be written into auth.log, and as result of this change in log, file "abc" will be edited to contain current count of rows in auth.log. This would trigger every time, the log got changed.










share|improve this question























  • Sounds like a task for inotifytools, especially inotifywait.

    – PerlDuck
    Feb 4 at 18:07











  • Thank you for answer. I tried to install it, but it showed error, that some libraries are not "installable".Do you know how can I deal with it ?

    – John Ronald
    Feb 4 at 18:21













  • @PerlDuck please don't post answers as comments. John, now that you have tried inotify, please edit your question and include what you tried and how it failed.

    – terdon
    Feb 4 at 20:23











  • I've used inotifywait and inotifywatch, BUT check the filesystem type where the file lives. They don't work on overlayfs, for example. apt-cache search inotify shows many choices, including entr - Run arbitrary commands when files change. I have NOT tried this.

    – waltinator
    Feb 4 at 21:52














0












0








0








I would like to execute an action when an even occur. More exactly, I would like some file to be edited, every time the "auth.log" changes.
For example : Somebody switch into root mode, that will be written into auth.log, and as result of this change in log, file "abc" will be edited to contain current count of rows in auth.log. This would trigger every time, the log got changed.










share|improve this question














I would like to execute an action when an even occur. More exactly, I would like some file to be edited, every time the "auth.log" changes.
For example : Somebody switch into root mode, that will be written into auth.log, and as result of this change in log, file "abc" will be edited to contain current count of rows in auth.log. This would trigger every time, the log got changed.







cron log events






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked Feb 4 at 18:01









John RonaldJohn Ronald

238




238













  • Sounds like a task for inotifytools, especially inotifywait.

    – PerlDuck
    Feb 4 at 18:07











  • Thank you for answer. I tried to install it, but it showed error, that some libraries are not "installable".Do you know how can I deal with it ?

    – John Ronald
    Feb 4 at 18:21













  • @PerlDuck please don't post answers as comments. John, now that you have tried inotify, please edit your question and include what you tried and how it failed.

    – terdon
    Feb 4 at 20:23











  • I've used inotifywait and inotifywatch, BUT check the filesystem type where the file lives. They don't work on overlayfs, for example. apt-cache search inotify shows many choices, including entr - Run arbitrary commands when files change. I have NOT tried this.

    – waltinator
    Feb 4 at 21:52



















  • Sounds like a task for inotifytools, especially inotifywait.

    – PerlDuck
    Feb 4 at 18:07











  • Thank you for answer. I tried to install it, but it showed error, that some libraries are not "installable".Do you know how can I deal with it ?

    – John Ronald
    Feb 4 at 18:21













  • @PerlDuck please don't post answers as comments. John, now that you have tried inotify, please edit your question and include what you tried and how it failed.

    – terdon
    Feb 4 at 20:23











  • I've used inotifywait and inotifywatch, BUT check the filesystem type where the file lives. They don't work on overlayfs, for example. apt-cache search inotify shows many choices, including entr - Run arbitrary commands when files change. I have NOT tried this.

    – waltinator
    Feb 4 at 21:52

















Sounds like a task for inotifytools, especially inotifywait.

– PerlDuck
Feb 4 at 18:07





Sounds like a task for inotifytools, especially inotifywait.

– PerlDuck
Feb 4 at 18:07













Thank you for answer. I tried to install it, but it showed error, that some libraries are not "installable".Do you know how can I deal with it ?

– John Ronald
Feb 4 at 18:21







Thank you for answer. I tried to install it, but it showed error, that some libraries are not "installable".Do you know how can I deal with it ?

– John Ronald
Feb 4 at 18:21















@PerlDuck please don't post answers as comments. John, now that you have tried inotify, please edit your question and include what you tried and how it failed.

– terdon
Feb 4 at 20:23





@PerlDuck please don't post answers as comments. John, now that you have tried inotify, please edit your question and include what you tried and how it failed.

– terdon
Feb 4 at 20:23













I've used inotifywait and inotifywatch, BUT check the filesystem type where the file lives. They don't work on overlayfs, for example. apt-cache search inotify shows many choices, including entr - Run arbitrary commands when files change. I have NOT tried this.

– waltinator
Feb 4 at 21:52





I've used inotifywait and inotifywatch, BUT check the filesystem type where the file lives. They don't work on overlayfs, for example. apt-cache search inotify shows many choices, including entr - Run arbitrary commands when files change. I have NOT tried this.

– waltinator
Feb 4 at 21:52










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