Comment 3 for bug 1399934

I'll tell you how this is a problem. With the alert going out about the GHOST/glibc issue I did the following to check my glibc version:
vecna bin # apt list | grep glibc
vecna bin # apt list
apt
Usage: apt command [options]
       apt help command [options]

Commands:
autoclean - Erase old downloaded archive files
<snip.....description doesn't offer "list" as an option>
version - Show the installed version of a package
                        This apt has Super Cow Powers

So basically, this looks like /usr/local/bin/apt acts like 'apt-get'. (I looked, it isn't a link.)

When you "man apt" you get the proper man page, which includes the list command.

Turns out the "real" apt is in /usr/bin:
vecna bin # /usr/bin/apt list | grep glibc

WARNING: /usr/bin/apt does not have a stable CLI interface yet. Use with caution in scripts.

clisp-module-bindings-glibc/trusty 1:2.49-9ubuntu1 amd64
eglibc-source/trusty-updates 2.19-0ubuntu6.5 all
glibc-doc/trusty-updates 2.19-0ubuntu6.5 all
glibc-doc-reference/trusty 2.19-0ubuntu1 all
vecna bin #

That's the behavior I expected.

This is on a mint 17 system:
vecna bin # cat /etc/issue
Linux Mint 17 Qiana \n \l
vecna bin # uname -a
Linux vecna 3.13.0-24-generic #47-Ubuntu SMP Fri May 2 23:30:00 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
vecna bin #

This is how it works with ubuntu 14.04:
root@vance:~# cat /etc/issue
Ubuntu 14.04.1 LTS \n \l
root@vance:~# uname -a
Linux vance 3.13.0-32-generic #57-Ubuntu SMP Tue Jul 15 03:51:08 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
root@vance:~# apt list | grep glibc

WARNING: apt does not have a stable CLI interface yet. Use with caution in scripts.

clisp-module-bindings-glibc/trusty 1:2.49-9ubuntu1 amd64
eglibc-source/trusty-updates 2.19-0ubuntu6.5 all
glibc-doc/trusty-updates 2.19-0ubuntu6.5 all
glibc-doc-reference/trusty 2.19-0ubuntu1 all

So, in my mind, having to hunt around to find the proper apt, as shown by the man page on my system, is problem.