Package: apt Version: 1.4.6 Severity: minor tg@leee:~ $ sudo apt-get --purge idst-upgrade E: Command line option --purge is not understood in combination with the other options
This is because at some point (I believe I had a related bugreport) --purge was made to be an error instead of silently ignored with things like “apt-get --purge clean” (which still annoys me as I have to use ^W and backspace twice to remove it from the command line, when it did no harm before) so it’s now only available for a whitelisted list of commands, and the commands are checked too late. A less savvy user would be confused by this error message. For comparison: tg@leee:~ $ sudo apt-get idst-upgrade E: Invalid operation idst-upgrade -- System Information: Debian Release: 9.0 APT prefers unstable APT policy: (500, 'unstable') Architecture: i386 (i686) Kernel: Linux 4.9.0-3-686-pae (SMP w/2 CPU cores) Locale: LANG=C, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8), LANGUAGE=C (charmap=UTF-8) Shell: /bin/sh linked to /bin/lksh Init: sysvinit (via /sbin/init) Versions of packages apt depends on: ii adduser 3.115 ii debian-archive-keyring 2017.5 ii gpgv 2.1.18-8 ii init-system-helpers 1.48 ii libapt-pkg5.0 1.4.6 ii libc6 2.24-11 ii libgcc1 1:6.3.0-18 ii libstdc++6 6.3.0-18 Versions of packages apt recommends: ii gnupg 2.1.18-8 ii gnupg1 1.4.21-4 ii gnupg2 2.1.18-8 Versions of packages apt suggests: pn apt-doc <none> pn aptitude | synaptic | wajig <none> ii dpkg-dev 1.18.24 ii powermgmt-base 1.31+nmu1 ii python-apt 1.4.0~beta3 -- Configuration Files: /etc/cron.daily/apt-compat changed [not included] -- no debconf information
