** Description changed: + [Impact] + + * For consistency reasons sbin should be ordered before bin in PATH. + + [Test Case] + + * $ env -u PATH /bin/bash -c 'echo $PATH' + + And check that matching pairs in PATH, have /sbin variant leading /bin + variant. + + [Regression Potential] + + * Ubuntu does not ship duplicate binries, with different behaviour + between /sbin and /bin, thus all binaries will continue to be found in + all locations. Also PATH is normally already set in the environment, and + this change only affects the fallback path when bash is executed without + any environment, i.e. booting with 'init=/bin/bash' + + [Other Info] + + * Original bug report detailing inconsistent paths between various shells. + + --- + + $ env -u PATH /bin/sh -c 'echo $PATH' /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin $ env -u PATH /bin/dash -c 'echo $PATH' /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin $ systemd-run --unit test-env env # ... and check journal for PATH /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin $ env -u PATH /bin/bash -c 'echo $PATH' /usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin:. $ env -u PATH /bin/busybox sh -c 'echo $PATH' /sbin:/usr/sbin:/bin:/usr/bin $ grep 'export PATH=' -r initramfs-tools-0.131ubuntu10/ initramfs-tools-0.131ubuntu10/mkinitramfs:export PATH='/usr/bin:/sbin:/bin' initramfs-tools-0.131ubuntu10/init:export PATH=/sbin:/usr/sbin:/bin:/usr/bin dracut.sh has DRACUT_PATH=${DRACUT_PATH:-/sbin /bin /usr/sbin /usr/bin} exported as PATH dracut-047+31/modules.d/99shutdown/shutdown.sh:export PATH=/usr/sbin:/usr/bin:/sbin:/bin $ cat /etc/environment PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games" apt & dpkg => should probably initiate /usr/local-less PATH Imho the rest should probably be harmonised to: /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/bin === From a duplicate https://bugs.launchpad.net/ubuntu/+source/bash/+bug/1614080 : $ 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:. I believe later releases of bash, do too include CWD in the built-in PATH.
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