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BACKUP.8
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上传日期：2007-02-01
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操作系统开发
开发平台：
C/C++
- BACKUP(8) Minix Programmer's Manual BACKUP(8)
- 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
- -n Do not backup top-level directories
- -o Do not copy *.o files
- -r Restore files
- -s Do not copy *.s files
- -t Preserve creation times
- -v Verbose; list files being backed up
- -z Compress the files on the backup medium
- EXAMPLES
- 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 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. Backup uses times
- for this purpose, like make. Calling Backup as Restore 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
- 1
- BACKUP(8) Minix Programmer's Manual BACKUP(8)
- necessary. The target directory contents are thus returned to some
- previous state.
- SEE ALSO
- tar(1).
- 2
