man/cat1/tail.1.txt
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TAIL(1) User Commands TAIL(1)
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 giv- ing 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 inacces- sible when tail starts or if it becomes inacces- sible 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 Tay- lor, and Jim Meyering. REPORTING BUGS Report bugs to <bug-coreutils@gnu.org>. COPYRIGHT Copyright (C) 2004 Free Software Foundation, Inc. This is free software; see the source for copying condi- tions. There is NO warranty; not even for MERCHANTABIL- ITY or FITNESS FOR A PARTICULAR PURPOSE. SEE ALSO The full documentation for tail is maintained as a Tex- info manual. If the info and tail programs are properly installed at your site, the command info tail should give you access to the complete manual. tail 5.3.0 December 2004 TAIL(1) |