Section (1) tail
tail — output the last part of files
Print the last 10 lines of each FILE to standard output. With more than one FILE, precede each with a header giving the file name.
With no FILE, or when FILE is −, read standard input.
Mandatory arguments to long options are mandatory for short options too.
output the last NUM bytes; or use
−c+NUM to output starting with byte NUM of each file
output appended data as the file grows;
an absent option argument means _zsingle_quotesz_descriptor_zsingle_quotesz_
output the last NUM lines, instead of the last 10; or use
−n+NUM to output starting with line NUM
−−follow=name/, reopen a FILE which has not
changed size after N (default 5) iterations to see if it has been unlinked or renamed (this is the usual case of rotated log files); with inotify, this option is rarely useful
−f, terminate after process ID, PID dies
never output headers giving file names
keep trying to open a file if it is inaccessible
−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
always output headers giving file names
line delimiter is NUL, not newline
display this help and exit
output version information and exit
NUM may have a multiplier suffix: b 512, kB 1000, K 1024, MB 1000*1000, M 1024*1024, GB 1000*1000*1000, G 1024*1024*1024, and so on for T, P, E, Z, Y. Binary prefixes can be used, too: KiB=K, MiB=M, and so on.
−f), tail defaults to
following the file descriptor, which means that even if a
tail_zsingle_quotesz_ed file is renamed, tail will continue to track its end.
This default behavior is not desirable when you really want
to track the actual name of the file, not the file descriptor
(e.g., log rotation). Use
−−follow=name/ in that case. That
causes tail to track the named file in a way that
accommodates renaming, removal and creation.
GNU coreutils online help: <https://www.gnu.org/software/coreutils/>
Report any translation bugs to <https://translationproject.org/team/>
Full documentation <https://www.gnu.org/software/coreutils/tail>
or available locally via: info _zsingle_quotesz_(coreutils) tail invocation_zsingle_quotesz_
Copyright © 2019 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.