08-12-2012
Chubler_XL is correct. Here's the relevant bit from the POSIX documentation:
Quote:
Originally Posted by POSIX
If no expression is present, -print shall be used as the expression. Otherwise, if the given expression does not contain any of the primaries -exec, -ok, or -print, the given expression shall be effectively replaced by:
( given_expression ) -print
Regards,
Alister
This User Gave Thanks to alister For This Post:
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NAME
backup - backup files
SYNOPSIS
backup [-djmnorstvz] dir1 dir2
OPTIONS
-d At top level, only directories are backed up
-j Do not copy junk: *.Z, *.bak, a.out, core, etc
-m If device full, prompt for new diskette
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-o Do not copy *.o files
-r Restore files
-s Do not copy *.s files
-t Preserve creation times
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backup -mz . /f0 # Backup current directory compressed
backup /bin /usr/bin
# Backup bin from RAM disk to hard disk
DESCRIPTION
Backup (recursively) backs up the contents of a given directory and its subdirectories to another part of the file system. It has two typ-
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newer files in the target directory with older files from the source directory, uncompressing them if necessary. The target directory con-
tents are thus returned to some previous state.
SEE ALSO
tar(1).
BACKUP(8)