kandi X-RAY | dnf Summary
kandi X-RAY | dnf Summary
Package manager based on libdnf and libsolv. Replaces YUM.
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Top functions reviewed by kandi - BETA
- Run security packages
- Merge update filters
- Return installonlypkg query
- Query the server
- Adds common options
- List repositories
- Return the expiry string
- Return True if repo matches a pattern
- Returns the size of a repo
- Set the argument parser
- Switch artifacts to new modules
- Begin a transaction
- Perform a transaction
- Reinstall packages
- Run the SWDB
- Runs rpwm
- Main entry point
- Fills the slack entry
- Configure from options
- Configures the command line options
- Print a progress bar
- Fills the slack roster
- Run packages
- Callback for the post trans output
- Configure package
- Get information about a set of modules
- Called by dnf
dnf Key Features
dnf Examples and Code Snippets
function n(e){var t=e.toLowerCase(),n=t.split(":"),r=n.length,i=8;n[0]===""&&n[1]===""&&n[2]===""?(n.shift(),n.shift()):n[0]===""&&n[1]===""?n.shift():n[r-1]===""&&n[r-2]===""&&n.pop(),r=n.length,n[r-1].indexOf
Community Discussions
Trending Discussions on dnf
QUESTION
I installed fmt
using dnf install fmt
. It was successful. But when I try to use it as #include
it says it is not found. I downloaded include
from fmt git page so it finds format.h
now with -I...
but I have compilation errors.
ANSWER
Answered 2022-Apr-10 at 15:06Fedora/RHEL/CentOS uses the following naming convention for all packages that installed shared libraries:
name - this package contains runtime shared libraries that are needed to run programs that are linked with this library.
name-devel
- the "devel" packages contains header files and the symbolic links that allow you to link with the shared library when developing applications that use this library.
You need both packages to compile the code that uses the library. The devel
package specifies a dependency on the main package, so dnf install name-devel
is going to install both packages.
You should invest a little bit of time to learn how to build your own rpm
packages. It's not that complicated. When you build your package rpmbuild
will take care of analyzing the resulting binary, discovering which shared libraries it links with, then recording the appropriate dependency in your own rpm
package, so installing it will pull in only the main name
package.
QUESTION
I am trying to run a CentOS 8 server through VirtualBox (6.1.30) (Vagrant), which worked just fine yesterday for me, but today I tried running a sudo yum update
. I keep getting this error for some reason:
ANSWER
Answered 2022-Mar-26 at 20:59Check out this article: CentOS Linux EOL
The below commands helped me:
QUESTION
Question in short
To have a proper input for pycosat, is there a way to speed up calculation from dnf to cnf, or to circumvent it altogether?
Question in detail
I have been watching this video from Raymond Hettinger about modern solvers. I downloaded the code, and implemented a solver for the game Towers in it. Below I share the code to do so.
Example Tower puzzle (solved):
...ANSWER
Answered 2022-Mar-19 at 22:23First, it's good to note the difference between equivalence and equisatisfiability. In general, converting an arbitrary boolean formula (say, something in DNF) to CNF can result in a exponential blow-up in size.
This blow-up is the issue with your from_dnf
approach: whenever you handle another product term, each of the literals in that product demands a new copy of the current cnf clause set (to which it will add itself in every clause). If you have n product terms of size k, the growth is O(k^n)
.
In your case n
is actually a function of k!
. What's kept as a product term is filtered to those satisfying the view constraint, but overall the runtime of your program is roughly in the region of O(k^f(k!))
. Even if f grows logarithmically, this is still O(k^(k lg k))
and not quite ideal!
Because you're asking "is this satisfiable?", you don't need an equivalent formula but merely an equisatisfiable one. This is some new formula that is satisfiable if and only if the original is, but which might not be satisfied by the same assignments.
For example, (a ∨ b)
and (a ∨ c) ∧ (¬b)
are each obviously satisfiable, so they are equisatisfiable. But setting b
true satisfies the first and falsifies the second, so they are not equivalent. Furthermore the first doesn't even have c
as a variable, again making it not equivalent to the second.
This relaxation is enough to replace this exponential blow-up with a linear-sized translation instead.
The critical idea is the use of extension variables. These are fresh variables (i.e., not already present in the formula) that allow us to abbreviate expressions, so we don't end up making multiple copies of them in the translation. Since the new variable is not present in the original, we'll no longer have an equivalent formula; but because the variable will be true if and only if the expression is, it will be equisatisfiable.
If we wanted to use x
as an abbreviation of y
, we'd state x ≡ y
. This is the same as x → y
and y → x
, which is the same as (¬x ∨ y) ∧ (¬y ∨ x)
, which is already in CNF.
Consider the abbreviation for a product term: x ≡ (a ∧ b)
. This is x → (a ∧ b)
and (a ∧ b) → x
, which works out to be three clauses: (¬x ∨ a) ∧ (¬x ∨ b) ∧ (¬a ∨ ¬b ∨ x)
. In general, abbreviating a product term of k literals with x
will produce k binary clauses expressing that x
implies each of them, and one (k+1)
-clause expressing that all together they imply x
. This is linear in k
.
To really see why this helps, try converting (a ∧ b ∧ c) ∨ (d ∧ e ∧ f) ∨ (g ∧ h ∧ i)
to an equivalent CNF with and without an extension variable for the first product term. Of course, we won't just stop with one term: if we abbreviate each term then the result is precisely a single CNF clause: (x ∨ y ∨ z)
where these each abbreviate a single product term. This is a lot smaller!
This approach can be used to turn any circuit into an equisatisfiable formula, linear in size and in CNF. This is called a Tseitin transformation. Your DNF formula is simply a circuit composed of a bunch of arbitrary fan-in AND gates, all feeding into a single arbitrary fan-in OR gate.
Best of all, although this formula is not equivalent due to additional variables, we can recover an assignment for the original formula by simply dropping the extension variables. It is sort of a 'best case' equisatisfiable formula, being a strict superset of the original.
To patch this into your code, I added:
QUESTION
So I was messing around with different versions of python to the extent that now I cannot even do a dnf reinstall python
, as suggested here, and python does not work.
The error which appears on any command really is: bash: /usr/bin/dnf: /usr/bin/python3: bad interpreter: Permission denied
I do have python3.7, python3.9, and python3.10 folders in /usr/lib which as far as I know are in somewhat good condition.
What can I do?
EDIT: my current /usr/bin/python3 points to a directory instead of an executable... could this be the problem?
which python3
returns the following:
ANSWER
Answered 2022-Mar-18 at 04:53As suggested in the comments, it is important to download the exact rpm package that dnf is configured to use. This can be found by rpm -qa python3
.
After finding and downloading this package, install it using the rpm -i command. A successful installation will create the /usr/bin/python_version folder. For me, it was python3.10, so /usr/bin/python3.10.
When this is done, remove the existing symlink at /usr/bin/python3, and instead link to the newly created python version.
QUESTION
I don't usually use Fedora or RPMs, so I'm flying blind here. There are lots of similar questions around here, but none that I found are to the exact point where I'm stuck.
I have the source RPM for an old game program on Fedora ("six" is the game). I want to add a couple of features, but first I want to make sure I know how to compile it so that any future problems are new. I have not made any changes yet at all.
I'm not completely helpless -- when I did
...ANSWER
Answered 2022-Jan-27 at 14:37If you see errors about a specific library missing, you can use dnf
itself to find out the name. For example, on Fedora 35:
QUESTION
I have podman installed on a CentOS 8 machine. I want to switch to Docker so need to remove podman first because it conflicts with Docker. However, when I try to remove it I get this:
...ANSWER
Answered 2022-Feb-26 at 12:49solved by adding --allowerasing
QUESTION
If I have an image like python:latest
, when will docker check with the repo to see if the tag now points to a newer image, and download that new image?
I know it will do it if:
- The image isn't found on your local machine, and you try to run a container using that image
- You explicitly run
docker pull python:latest
Are there other times docker will update the image? When the docker daemon restarts? When the system restarts (which is probably the same as the docker daemon restarting)? When docker is updated (from apt/dnf repos)?
At one point, it looked like we had a case at our company where we didn't pin a particular version of an image (used :latest
), and after a system update, docker grabbed a new version of the image, and things broke. Clearly version pinning is important in production, but not the point of the question.
ANSWER
Answered 2022-Feb-24 at 17:51If the image already exists in the local docker engine, docker will not pull it again unless requested. There are flags to request the image gets pulled again on some commands. Otherwise, if you see the image change, I would look for either a docker pull
command being run, or the images getting cleaned (e.g. with a prune command).
QUESTION
I've updated my fedora linux with dnf update
to kernel version Linux 5.16.7-200.fc35.x86_64 x86_64
and am now getting a EPERM/permission denied error for a call to io_uring_queue_init
, even when calling my program as root.
I am at a total loss, is this a bug in the kernel build or do I need to add some init code?
...ANSWER
Answered 2022-Feb-13 at 13:22It was selinux, I solved it by disabling selinux.
The upgrade came with kernel 5.16:
https://www.phoronix.com/scan.php?page=news_item&px=SELinux-IO_uring-Linux-5.16
QUESTION
I am trying to follow the official documentation on how to install a single node OKD 4.9 cluster from these links:
- https://docs.okd.io/4.9/installing/installing_sno/install-sno-preparing-to-install-sno.html
- https://docs.okd.io/4.9/installing/installing_sno/install-sno-installing-sno.html
Here is my network topology:
Here is the pfsense DHCP configuration that makes all the hosts have static IP addresses:
Here is the pfsence DNS configuration:
Here is my install-config.yaml
:
ANSWER
Answered 2022-Feb-02 at 22:52Seems like these 2 documentation links are a lie:
- https://docs.okd.io/4.9/installing/installing_sno/install-sno-preparing-to-install-sno.html
- https://docs.okd.io/4.9/installing/installing_sno/install-sno-installing-sno.html
According to these 2 issues:
- https://github.com/openshift/okd/discussions/1012
- https://github.com/openshift/openshift-docs/issues/39759
OKD does not support "installation with Assisted Installer" and these links are "installation with Assisted Installer". Nice waste of time.
QUESTION
I am deploying multiple R versions on multiple virtual desktops. I've built 3.6.3
and 4.1.2
R from source on Ubuntu 18.04.3 LTS
. None of them finds the system-wide Rprofile.site
file in /etc/R
or the system certificates in /usr/share/ca-certificates
. However R (3.4.4
) installed with APT has no such problems. I used Ansible, but for the sake of this question I reproduced the deployment for one host with a shell script.
ANSWER
Answered 2022-Jan-14 at 17:25Finally I found the solution:
Since both system has the arch and OS. I cross copied the R compiled installations between them. The R which was compiled on the problematic system, but was run on the correct one gave the warnings below after the calling of the install.packages("renv", repos="https://cran.wu.ac.at/")
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install dnf
You can use dnf like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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