The problem seems to have been introduced in 14.04
philippe@pv-desktop:~$ for i in 12.04 12.10 13.04 13.10 14.04 14.10 15.04 15.10 16.04; do echo $i; docker run -it --rm ubuntu:$i bash -c "unset PATH; /bin/bash -c 'echo \$PATH'"; done 12.04 /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin 12.10 /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin 13.04 /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin 13.10 /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin 14.04 /usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin:. 14.10 /usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin:. 15.04 /usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin:. 15.10 /usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin:. 16.04 /usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin:.
The problem seems to have been introduced in 14.04
philippe@ pv-desktop: ~$ for i in 12.04 12.10 13.04 13.10 14.04 14.10 15.04 15.10 16.04; do echo $i; docker run -it --rm ubuntu:$i bash -c "unset PATH; /bin/bash -c 'echo \$PATH'"; done sbin:/usr/ local/bin: /usr/sbin: /usr/bin: /sbin:/ bin sbin:/usr/ local/bin: /usr/sbin: /usr/bin: /sbin:/ bin sbin:/usr/ local/bin: /usr/sbin: /usr/bin: /sbin:/ bin sbin:/usr/ local/bin: /usr/sbin: /usr/bin: /sbin:/ bin bin:/usr/ local/sbin: /usr/bin: /usr/sbin: /bin:/sbin: . bin:/usr/ local/sbin: /usr/bin: /usr/sbin: /bin:/sbin: . bin:/usr/ local/sbin: /usr/bin: /usr/sbin: /bin:/sbin: . bin:/usr/ local/sbin: /usr/bin: /usr/sbin: /bin:/sbin: . bin:/usr/ local/sbin: /usr/bin: /usr/sbin: /bin:/sbin: .
12.04
/usr/local/
12.10
/usr/local/
13.04
/usr/local/
13.10
/usr/local/
14.04
/usr/local/
14.10
/usr/local/
15.04
/usr/local/
15.10
/usr/local/
16.04
/usr/local/