Extend PATH and set -o pipefail in linux ssh

Some distributions have 'ip' utility in /sbin, and there's no link with target of /bin/ip
(CentOS7, for instance).
By this patch we
1) remove redundant specification: /bin is in PATH already
2) add /sbin to PATH, since SSH misses it by default
3) "set -eu -o pipefail" to make errors more explicit

Change-Id: I7693911e6b883a21baafe6f804564754ebaea5e0
2 files changed