Интерактивная система просмотра системных руководств (man-ов)
tail (1)
tail (1) ( Solaris man: Команды и прикладные программы пользовательского уровня )
tail (1) ( FreeBSD man: Команды и прикладные программы пользовательского уровня )
tail (1) ( Русские man: Команды и прикладные программы пользовательского уровня )
>> tail (1) ( Linux man: Команды и прикладные программы пользовательского уровня )
tail (1) ( POSIX man: Команды и прикладные программы пользовательского уровня )
NAME
tail - output the last part of files
SYNOPSIS
tail
[OPTION]... [FILE]...
DESCRIPTION
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.
--retry
keep trying to open a file even if it is
inaccessible when tail starts or if it becomes
inaccessible later; useful when following by name,
i.e., with --follow=name
-c, --bytes=N
output the last N bytes
-f, --follow[={name|descriptor}]
output appended data as the file grows;
-f, --follow, and --follow=descriptor are
equivalent
-F
same as --follow=name--retry
-n, --lines=N
output the last N lines, instead of the last 10
--max-unchanged-stats=N
with --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)
--pid=PID
with -f, terminate after process ID, PID dies
-q, --quiet, --silent
never output headers giving file names
-s, --sleep-interval=S
with -f, sleep for approximately S seconds
(default 1.0) between iterations.
-v, --verbose
always output headers giving file names
--help
display this help and exit
--version
output version information and exit
If the first character of N (the number of bytes or lines) is a `+',
print beginning with the Nth item from the start of each file, otherwise,
print the last N items in the file. N may have a multiplier suffix:
b 512, k 1024, m 1024*1024.
With --follow (-f), tail defaults to following the file descriptor, which
means that even if a tail'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 by reopening it periodically to see if it has been removed and
recreated by some other program.
AUTHOR
Written by Paul Rubin, David MacKenzie, Ian Lance Taylor, and Jim Meyering.
