tail - phpMan

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TAIL(1)                          User Commands                         TAIL(1)

       tail - output the last part of files

       tail [OPTION]... [FILE]...

       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.

       -c, --bytes=K
              output  the  last K bytes; alternatively, use -c +K to output bytes starting
              with the Kth of each file

       -f, --follow[={name|descriptor}]
              output appended data as the file grows; -f, --follow, and  --follow=descrip-
              tor are equivalent

       -F     same as --follow=name --retry

       -n, --lines=K
              output  the  last  K  lines,  instead of the last 10; or use -n +K to output
              lines starting with the Kth

              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).  With inotify, this option  is  rarely

              with -f, terminate after process ID, PID dies

       -q, --quiet, --silent
              never output headers giving file names

              keep  trying  to open a file even when it is or becomes inaccessible; useful
              when following by name, i.e., with --follow=name

       -s, --sleep-interval=N
              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, --verbose
              always output headers giving file names

       --help display this help and exit

              output version information and exit

       If  the  first character of K (the number of bytes or lines) is a '+', print begin-
       ning with the Kth item from the start of each file, otherwise,  print  the  last  K
       items  in  the  file.   K  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.

       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 in a way that accommodates renam-
       ing, removal and creation.

       Written by Paul Rubin, David MacKenzie, Ian Lance Taylor, and Jim Meyering.

       Report tail bugs to bug-coreutils AT gnu.org
       GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
       General help using GNU software: <http://www.gnu.org/gethelp/>
       Report tail translation bugs to <http://translationproject.org/team/>

       Copyright (C) 2010 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 permitted by law.

       The full documentation for tail is maintained as a Texinfo manual.  If the info and
       tail programs are properly installed at your site, the command

              info coreutils 'tail invocation'

       should give you access to the complete manual.

GNU coreutils 8.4                 March 2017                           TAIL(1)

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