The file(s) are copied to the target file or directory. If the destination is a directory, then the file is copied into directory with its original filename. If the target file already exists, it is either renamed to file.old if the -b option is given or overwritten if permissions allow.
An alternate backup suffix may be specified via the -B option's argument.
Basic syntax is in the form 
install [OPTION]... SOURCE DEST
This line of code copies all .xyz file from /source/folder to /destination/folder 
install -D /source/folder/*.xyz /destination/folder

Flags

  • -b: Back up any existing files before overwriting them by renaming them to file.old. See -B for specifying a different backup suffix. (-B suffix Use suffix as the backup suffix if -b is given)
  • -C: Copy the file. If the target file already exists and the files are the same, then don't change the modification time of the target
  • -d: Create directories. Missing parent directories are created as required.
  • -f: Specify the target's file flags; see chflags(1) for a list of possible flags and their meanings.
  • -g: Specify a group. A numeric GID is allowed.
  • -m: Specify an alternate mode. The default mode is set to rwxr-xr-x (0755). The specified mode may be either an octal or symbolic value.
  • -o: Specify an owner. A numeric UID is allowed.