> On 23 May 2022, at 23:03, Todd Zullinger <t...@pobox.com> wrote: > > Hi, > > Bill Cunningham wrote: >> I have been trying to use rpm or dnf to remove some rpms. > > I'd use dnf. It provides a much wider safety net.
I have always assumed that using rpm -e will mess up dnf. so I never use rpm for any operation that modifies the system. I think I shot off a foot a decade or so ago doing that. > > You can do this with rpm as well, but it requires greater care. > >> Here is >> an example of what I have been trying to do, ex: >> >> list.txt, >> >> >> gcc-devel // example, >> >> python-devel //example >> >> rpm -e // would this list content be redirectable to rpm -e ? >> >> cat list.txt >> >> lists rpms, >> >> rpm -e < cat list, or >> >> cat list | rpm -e >> >> do not work. > > Indeed, rpm doesn't take the list of packages on stdin. You > can use a number of techniques here (we all develop our > favorite habits, but knowing "there is more than one way to > do it"™ is always handy. > > Here's how I setup a test: > > $ printf '%s\n' gcc-devel python-devel >/tmp/list > > $ cat /tmp/list > gcc-devel > python-devel > > You could use xargs: > > $ xargs sudo dnf remove </tmp/list > > This will display the 'dnf remove' output, showing you what > it would do. Then it will exit immediately because there is > no way for it to read the 'Is this ok [y/N]:' prompt. You > can run it again with the '-y' option. > > Another way to feed the list to dnf (or rpm) is to use > command substitution: > > $ sudo dnf remove $(cat /tmp/list) > > Bash¹ has a shortcut for that cat usage which is slightly > faster: > > $ sudo dnf remove $(< /tmp/list) > > ¹ Other shells likely have this is something similar, but > I'm not familiar with them offhand > > A for loop works too, but that doesn't work very well when > there are interdependent packages in the list (particularly > with rpm, but even with dnf it can cause problems). It's > also a _lot_ slower to run the rpm or dnf command multiple > times instead of once. > > That's just two ways to go about it. Hopefully they help. > > -- > Todd > _______________________________________________ > users mailing list -- users@lists.fedoraproject.org > To unsubscribe send an email to users-le...@lists.fedoraproject.org > Fedora Code of Conduct: > https://docs.fedoraproject.org/en-US/project/code-of-conduct/ > List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines > List Archives: > https://lists.fedoraproject.org/archives/list/users@lists.fedoraproject.org > Do not reply to spam on the list, report it: > https://pagure.io/fedora-infrastructure
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