tailf

follow the growth of a log file

Synopsis

tailf [OPTION] file

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examples

source

            
  alias apache='sudo
  /usr/local/apache2/bin/apachectl'



  alias tail_query='tailf /var/lib/mysql/query.log'


  alias tail_query='tailf /var/lib/mysql/query.log'


  alias tail_access_moba='tailf /home/moba/data/log/access_log'


  alias tail_error_moba='tailf /home/moba/data/log/error_log'

description

tailf will print out the last 10 lines of a file and then wait for the file to grow. It is similar to tail -f but does not access the file when it is not growing. This has the side effect of not updating the access time for the file, so a filesystem flush does not occur periodically when no log activity is happening.

tailf is extremely useful for monitoring log files on a laptop when logging is infrequent and the user desires that the hard disk spin down to conserve battery life.

Mandatory arguments to long options are mandatory for short options too.
-n, --lines=N, -N

output the last N lines, instead of the last 10.

-V, --version

Output version information and exit.

-h, --help

Display help and exit.

availability

The tailf command is part of the util-linux package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux/.

see also

tail , less

author

This program was originally written by Rik Faith (faith[:at:]acm[:dot:]org) and may be freely distributed under the terms of the X11/MIT License. There is ABSOLUTELY NO WARRANTY for this program.

The latest inotify based implementation was written by Karel Zak (kzak[:at:]redhat[:dot:]com).