z/OS V1R9.0 UNIX System Services Command ... - Christian Grothoff

Portability
Related Information
stty
POSIX.2 User Portability Extension, X/Open Portability Guide, UNIX systems.
The +m, –t, and tabspec arguments are all extensions to the POSIX standard.
The –t argument is an extension to the X/Open standard.
tail — Display the last part of a file
Format
Description
Options
File Tag Specific Options
tail[–B] [–f] [–bcklmn [±]number] [file]
tail[–B] [–f] [±number [bcklmn]] [file]
tail without options displays the last ten lines of file. This is useful for seeing the
most recent entries in log files and any file where new information is added on the
end.
The tail command is used with text files. To make a binary file input to the tail
command, use the –c option. If a binary file is input without the –c option being
specified, the entire file is sent to the screen.
±number
Is either of the following:
+number
Skips to line number and then displays the rest of the file. For
example, +100 prints from line 100 to the end of the file.
–number
Prints number lines from the end of the file. For example, -20 prints
the last 20 lines in the file.
You can precede or follow both +number and –number with one of the
following letters to indicate the unit to be used:
v b–blocks
v c–bytes
v k–kilobytes
v l or n–lines
v m–megabytes
The default unit is lines.
–f Monitors a file as it grows. Every two seconds, tail wakes up and prints any
new data at the end of the file. This option is ignored if tail read from the
standard input, and standard input is a pipe.
–B Disable autoconversion of tagged files.
tabs
Chapter 2. Shell command descriptions 615