back

backup & restore important file 用于文件的备份与恢复

there are five kinds file when backup or restore files:

• + new file only in srcpath
• > newer file in srcpath than in dstpath
• = same file between srcpath & dstpath
• < older file in srcpath than in dstpath
• - old file only in dstpath

usage: back [options] srcpath dstpath

1. -save
   copy new(+) and newer(>) files from srcpath to dstpath
2. -backup
   copy all(+ > <) files from srcpath to dstpath
3. -same
   copy all(+ > <) files from srcpath to dstpath, move old(-) files from dstpath to dstpath/trash

• -time compare files only by time stamp, don’t use hash
• -force copy or move files without confirm
• -help show help