-c

output the last NUM bytes; or use -c +NUM to output starting with byte NUM of each file

-f

output appended data as the file grows;an absent option argument means 'descriptor'

-F

same as --follow=name --retry

-n

output the last NUM lines, instead of the last 10; or use -n +NUM to output starting with line NUM

--max-unchanged-stats

with --follow=name, reopen a FILE which has notchanged size after N (default 5) iterations to see if it has been unlinked or renamed (this is theusual case of rotated log files); with inotify, this option is rarely useful

--pid

with -f, terminate after process ID, PID dies

-q

never output headers giving file names

--retry

keep trying to open a file if it is inaccessible

-s

with -f, sleep for approximately N seconds (default 1.0) between iterations; with inotify and --pid=P,check process P at least once every N seconds

-v

always output headers giving file names

-z

line delimiter is NUL, not newline

--help

display this help and exit

--version

output version information and exitNUM may have a multiplier suffix: b 512, kB 1000, K 1024, MB 1000*1000, M 1024*1024, GB 1000*1000*1000, G1024*1024*1024, and so on for T, P, E, Z, Y.With --follow (-f), tail defaults to following the file descriptor, which means that even if a tail'ed file isrenamed, tail will continue to track its end. This default behavior is not desirable when you really want totrack the actual name of the file, not the file descriptor (e.g., log rotation). Use --follow=name in thatcase. That causes tail to track the named file in a way that accommodates renaming, removal and creation.AUTHORWritten by Paul Rubin, David MacKenzie, Ian Lance Taylor, and Jim Meyering.REPORTING BUGSGNU coreutils online help: <http://www.gnu.org/software/coreutils/>Report tail translation bugs to <http://translationproject.org/team/>COPYRIGHTCopyright © 2017 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later<http://gnu.org/licenses/gpl.html>.This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent per‐mitted by law.