How To Install abcls on CentOS 8

One-liner Install Command

If you are only interested in the installation command, here is a quick answer for you:

sudo yum makecache && sudo yum -y install alembic

sudo dnf makecache && sudo dnf -y install alembic

But if you are interested in the details with step-by-step instructions, the following information will be helpful.

What is abcls and How to Install It?

First things first, you will need access to a server or computer running CentOS 8. This guide was written specifically with a server running CentOS 8 in mind, although it should also work on older, supported versions of the operating system.

Also, make sure you are running a regular, non-root user with sudo privileges configured on your server. When you have an account available, log in as your non-root user to begin.

There are several ways to install abcls on CentOS 8. You can use (links are clickable):

In the following sections, we will describe each method in detail. You can choose one of them or refer to the recommended one.

Install abcls on CentOS 8 using dnf

First, update dnf packages database with dnf by running the next command:

sudo dnf makecache --refresh

After updating database, You can install abcls using dnf by running the following command:

sudo dnf -y install alembic

Install abcls on CentOS 8 using yum

Because abcls is available in CentOS 8’s default repositories, it is possible to install it from these repositories using the yum packaging system.

To begin, update local packages database with yum using the following command.

sudo yum makecache --refresh

Now can install abcls package on your server/computer by running the following command:

sudo yum -y install alembic

How to upgrade (update) a single package abcls using yum?

To update all the packages available on the system:

yum update

If you want to update a specific package like abcls in this example you should use the following command:

yum update alembic

To downgrade a package to an earlier version:

yum downgrade alembic

How to Upgrade abcls on CentOS 8 with dnf?

When you run the dnf update, all system packages with available updates are updated. However, if you want to upgrade a single package, then you would have to pass the package name as the argument to the dnf update command.

dnf update alembic

How To remove abcls from CentOS 8

To uninstall only the abcls package you can execute the following command:

sudo dnf remove alembic

Extra info and code examples

Alembic is a new database migration tool, written by the author of SQLAlchemy. A migration tool offers the following functionality: * Can emit ALTER statements to a database in order to change the structure of tables and other constructs * Provides a system whereby "migration scripts" may be constructed; each script indicates a particular series of steps that can "upgrade" a target database to a new version, and optionally a series of steps that can "downgrade" similarly, doing the same steps in reverse. * Allows the scripts to execute in some sequential manner. This package provides /usr/bin/alembic script and documentation for Alembic, and depends on the python-alembic package which contains all the actual code (in Python 2) for Alembic to actually work.

Conclusion

You now have a full guide on how to install abcls using dnf and yum package managers. Also, we showed how to update manually as a single package and different ways to uninstall the abcls from CentOS 8.

See also: