If usb is not listed by label, ie.  /dev/disk/by-label/REAR-000 doesn't exist
see where usb is mounted:
# dmesg | grep -i usb
(probably /dev/sdg)
# gnome-volume-properties&
# /usr/bin/gnome-disks&
- turn on automounting, and mount it
USB should now be mounted, eg mount command shows:
/dev/sdg1 on /mnt/usb-Kingston_DT_Rubber_3.0_60A44C426596BD51D2130014-0:0-part1 type ext3 (rw,nosuid,nodev,relatime)

If this usb was previously formated 
# e2label /dev/sdg1 REAR-000

Should now be good to go.

If disk was not previously formated, run:
# rear format /dev/sdg

Install cfg2html

$ scp gamma:/wwws/sysadmin/Computers/00_Servers/ReaR/cfg2html_phas.tar /usr/local/src
$ cd /usr/local/src
$ tar xf cfg2html_phas.tar
$ cd cfg2html
$ ll
total 160
-rw-r--r-- 1 root root 144086 Jun 21 10:11 cfg2html-linux-2.99-1.noarch.rpm
-rwxr-xr-x 1 root root    717 Jun 21 10:19 copy_cfg2html_files
drwxr-xr-x 3 root root   4096 Jun 21 10:12 etc
drwxr-xr-x 4 root root   4096 Jun 21 10:12 usr
$ ./copy_cfg2html_files 
 
/etc/cfg2html...
/etc/cfg2html/files  /etc/cfg2html/plugins  /etc/cfg2html/systeminfo
-----------------------------------------------------------
/usr/bin/cfg2html...
/usr/bin/cfg2html  /usr/bin/cfg2html-linux
-----------------------------------------------------------
/usr/share/doc/cfg2html-linux...
/usr/share/doc/cfg2html-linux/AUTHORS			     /usr/share/doc/cfg2html-linux/changelog.Debian.gz
/usr/share/doc/cfg2html-linux/cfg2html_Development_Tree.jpg  /usr/share/doc/cfg2html-linux/copyright
/usr/share/doc/cfg2html-linux/cfg2html.html		     /usr/share/doc/cfg2html-linux/README.Debian
/usr/share/doc/cfg2html-linux/cfg2html-Linux_deutsch.txt     /usr/share/doc/cfg2html-linux/README.gz

/usr/share/doc/cfg2html-linux/collect:
README	sendcfg2html

/usr/share/doc/cfg2html-linux/contrib:
bdf  cfg2html  check4errors-linux.sh  fc_collector.sh  html  ib_hca_info.sh  infiniband.sh  plugins
-----------------------------------------------------------
/usr/share/man/man8/cfg2html...
-rw-r--r-- 1 root root 1835 Jun 21 14:35 /usr/share/man/man8/cfg2html-linux.8.gz
-----------------------------------------------------------

$ mkdir /var/log/cfg2html

The following (v6.29 didn't seem to work for me. rdp 16-06-21)

$ rpm -qpl cfg2html-6.29-1.git201604171050.noarch.rpm
/etc/cfg2html
/etc/cfg2html/local.conf
/etc/cfg2html/plugins
/etc/cfg2html/systeminfo
/etc/cron.d/cfg2html
/usr/sbin/cfg2html
/usr/share/cfg2html
/usr/share/cfg2html/cfg2html-linux.sh
/usr/share/cfg2html/etc
/usr/share/cfg2html/etc/default.conf
/usr/share/cfg2html/lib
/usr/share/cfg2html/lib/global-functions.sh
/usr/share/cfg2html/lib/help-functions.sh
/usr/share/cfg2html/lib/html-functions.sh
/usr/share/cfg2html/lib/input-output-functions.sh
/usr/share/cfg2html/lib/linux-functions.sh
/usr/share/cfg2html/lib/shell-functions.sh
/usr/share/cfg2html/plugins
/usr/share/doc/packages/cfg2html
/usr/share/doc/packages/cfg2html/AUTHORS
/usr/share/doc/packages/cfg2html/COPYING
/usr/share/doc/packages/cfg2html/README
/usr/share/doc/packages/cfg2html/cfg2html.html
/usr/share/doc/packages/cfg2html/cfg2html.txt
/usr/share/man/man8/cfg2html.8.gz
/var/log/cfg2html

extract rpm files:
rpm2cpio cfg2html-6.29-1.git201604171050.noarch.rpm | cpio -idmv

## had problems with above version so went to v2.99
on new server:
$ scp gamma:/wwws/sysadmin/Computers/00_Servers/ReaR/cfg2html_phas.tar /usr/local/src
$ cd /usr/local/src
$ tar xf cfg2html_phas.tar
$ cd cfg2html
$ ll
total 160
-rw-r--r-- 1 root root 144086 Jun 21 10:11 cfg2html-linux-2.99-1.noarch.rpm
-rwxr-xr-x 1 root root    717 Jun 21 10:19 copy_cfg2html_files
drwxr-xr-x 3 root root   4096 Jun 21 10:12 etc
drwxr-xr-x 4 root root   4096 Jun 21 10:12 usr
$ ./copy_cfg2html_files

/etc/cfg2html...
/etc/cfg2html/files  /etc/cfg2html/plugins  /etc/cfg2html/systeminfo
-----------------------------------------------------------
/usr/bin/cfg2html...
/usr/bin/cfg2html  /usr/bin/cfg2html-linux
-----------------------------------------------------------
/usr/share/doc/cfg2html-linux...
/usr/share/doc/cfg2html-linux/AUTHORS                        /usr/share/doc/cfg2html-linux/changelog.Debian.gz
/usr/share/doc/cfg2html-linux/cfg2html_Development_Tree.jpg  /usr/share/doc/cfg2html-linux/copyright
/usr/share/doc/cfg2html-linux/cfg2html.html                  /usr/share/doc/cfg2html-linux/README.Debian
/usr/share/doc/cfg2html-linux/cfg2html-Linux_deutsch.txt     /usr/share/doc/cfg2html-linux/README.gz

/usr/share/doc/cfg2html-linux/collect:
README  sendcfg2html

/usr/share/doc/cfg2html-linux/contrib:
bdf  cfg2html  check4errors-linux.sh  fc_collector.sh  html  ib_hca_info.sh  infiniband.sh  plugins
-----------------------------------------------------------
/usr/share/man/man8/cfg2html...
-rw-r--r-- 1 root root 1835 Jun 21 14:35 /usr/share/man/man8/cfg2html-linux.8.gz
-----------------------------------------------------------