preload man page

preload — Adaptive readahead daemon


preload [OPTION]...


preload is an adaptive readahead daemon that prefetches files mapped by applications from the disk to reduce application startup time.

-h, --help

Display command line parameters and their default values, and exit.

-v, --version

Display version information and exit.

-c, --conffile

Set configuration file. Empty string means no conf file. (default is /etc/preload.conf)

-s, --statefile

Set state file to load/save. Empty string means no state. (default is /var/lib/preload/preload.state)

-l, --logfile

Set log file. Empty string means to log to stderr. (default is /var/log/preload.log)

-f, --foreground

Run in foreground, do not daemonize.

-n, --nice

Nice level. (default is 15)

-V, --verbose

Set the verbosity level.  Levels 0 to 10 are recognized. (default is 4)

-d, --debug

Debug mode: --logfile '' --foreground --verbose 9


On receipt of a SIGHUP, the daemon will close and reopen its log file, and reread the configuratoin file.

On receipt of a SIGUSR1, the daemon dumps the currently loaded configuration into the log file.

On receipt of a SIGUSR2, the daemon saves its state into the state file.


Written by Behdad Esfahbod <>

Reporting Bugs

Report bugs to <>


February 2017 preload 0.6.4 System Administration Utilities