err: not found

[kseistrup]

The install.sh script refers twice to the command err:

$ grep -n err install.sh
114:        err "Need '$1' (command not found)"
127:        err "Need '$1' (command not found)"

However, said err command is not defined in the install script itself, neither is it a builtin in POSIX compliant shells.

It could be as simple as:

err() {
  echo "$@" >&2
  exit 1
}

Please note, though, that the variable '$1' will never be expanded since it is enclosed in single quotes in the original script.