53 lines
1.8 KiB
Groff
53 lines
1.8 KiB
Groff
.TH BACKUP 8
|
|
.SH NAME
|
|
backup \- backup files
|
|
.SH SYNOPSIS
|
|
\fBbackup\fR [\fB\-djmnorstvz\fR] \fIdir1 dir2\fR
|
|
.br
|
|
.de FL
|
|
.TP
|
|
\\fB\\$1\\fR
|
|
\\$2
|
|
..
|
|
.de EX
|
|
.TP 20
|
|
\\fB\\$1\\fR
|
|
# \\$2
|
|
..
|
|
.SH OPTIONS
|
|
.FL "\-d" "At top level, only directories are backed up"
|
|
.FL "\-j" "Do not copy junk: \fI *.Z, *.bak, a.out, core\fR, etc"
|
|
.FL "\-m" "If device full, prompt for new diskette"
|
|
.FL "\-n" "Do not backup top-level directories"
|
|
.FL "\-o" "Do not copy \fI*.o\fR files"
|
|
.FL "\-r" "Restore files"
|
|
.FL "\-s" "Do not copy \fI*.s\fR files"
|
|
.FL "\-t" "Preserve creation times"
|
|
.FL "\-v" "Verbose; list files being backed up"
|
|
.FL "\-z" "Compress the files on the backup medium"
|
|
.SH EXAMPLES
|
|
.EX "backup \-mz . /f0" "Backup current directory compressed"
|
|
.EX "backup /bin /usr/bin" "Backup bin from RAM disk to hard disk"
|
|
.SH DESCRIPTION
|
|
.PP
|
|
\fIBackup\fR (recursively) backs up the contents of a given directory and its
|
|
subdirectories to another part of the file system.
|
|
It has two typical uses.
|
|
First, some portion of the file system can be backed up onto 1 or more
|
|
diskettes.
|
|
When a diskette fills up, the user is prompted for a new one.
|
|
The backups are in the form of mountable file systems.
|
|
Second, a directory on RAM disk can be backed up onto hard disk.
|
|
If the target directory is empty, the entire source directory is copied
|
|
there, optionally compressed to save space.
|
|
If the target directory is an old backup, only those files in the target
|
|
directory that are older than similar names in the source directory are
|
|
replaced.
|
|
\fIBackup\fR uses times for this purpose, like \fImake\fR.
|
|
Calling \fIBackup\fR as \fIRestore\fR is equivalent to using the -r option;
|
|
this replaces newer files in the target directory with older files from the
|
|
source directory, uncompressing them if necessary. The target directory
|
|
contents are thus returned to some previous state.
|
|
.SH "SEE ALSO"
|
|
.BR tar (1).
|