cp 命令怎样复制批量文件不覆盖存在的文件，不提示呢？

setthebox

-b
'--backup[=METHOD]'
     *Note Backup options::.  Make a backup of each file that would
     otherwise be overwritten or removed.  As a special case, `cp'
     makes a backup of SOURCE when the force and backup options are
     given and SOURCE and DEST are the same name for an existing,
     regular file.  One useful application of this combination of
     options is this tiny Bourne shell script:

          #!/bin/sh
          # Usage: backup FILE...
          # Create a GNU-style backup of each listed FILE.
          for i; do
            cp --backup --force -- "$i" "$i"
          done
cp命令中的这个参数就可以实现对于在复制过程中被盖或删除的同名文件进行备份。备份的文件会以“～”为文件名的最后一个符号。