How To Install updates on CentOS 7
Introduction
In this tutorial we learn how to install updates on CentOS 7.
What is updates
Contains license of the BIND DNS suite. CentOS Linux release files These are the GNU core utilities. This package is the combination of the old GNU fileutils, sh-utils, and textutils packages. curl is a command line tool for transferring data with URL syntax, supporting FTP, FTPS, HTTP, HTTPS, SCP, SFTP, TFTP, TELNET, DICT, LDAP, LDAPS, FILE, IMAP, SMTP, POP3 and RTSP. curl supports SSL certificates, HTTP POST, HTTP PUT, FTP uploading, HTTP form based upload, proxies, cookies, user+password authentication (Basic, Digest, NTLM, Negotiate, kerberos…), file transfer resume, proxy tunneling and a busload of other useful tricks. This package contains the supporting userspace utility, dmsetup, for the kernel device-mapper. This package contains the device-mapper shared library, libdevmapper. This package contains the Extra Packages for Enterprise Linux (EPEL) repository GPG key as well as configuration for yum. GLib is the low-level core library that forms the basis for projects such as GTK+ and GNOME. It provides data structure handling for C, portability wrappers, and interfaces for such runtime functionality as an event loop, threads, dynamic loading, and an object system. The glibc package contains standard libraries which are used by multiple programs on the system. In order to save disk space and memory, as well as to make upgrading easier, common system code is kept in one place and shared between programs. This particular package contains the most important sets of shared libraries standard C library and the standard math library. Without these two libraries, a Linux system will not function. The glibc-common package includes common binaries for the GNU libc libraries, as well as national language (locale) support. kpartx manages partition creation and removal for device-mapper devices. This is block device identification library, part of util-linux. libcurl is a free and easy-to-use client-side URL transfer library, supporting FTP, FTPS, HTTP, HTTPS, SCP, SFTP, TFTP, TELNET, DICT, LDAP, LDAPS, FILE, IMAP, SMTP, POP3 and RTSP. libcurl supports SSL certificates, HTTP POST, HTTP PUT, FTP uploading, HTTP form based upload, proxies, cookies, user+password authentication (Basic, Digest, NTLM, Negotiate, Kerberos4), file transfer resume, http proxy tunneling and more. This is the device mounting library, part of util-linux. This is library for ls-like terminal programs, part of util-linux. This is the universally unique ID library, part of util-linux. The libuuid library generates and parses 128-bit universally unique id’s (UUID’s). A UUID is an identifier that is unique across both space and time, with respect to the space of all UUIDs. A UUID can be used for multiple purposes, from tagging objects with an extremely short lifetime, to reliably identifying very persistent objects across a network. See also the “uuid” package, which is a separate implementation. Network Security Services (NSS) is a set of libraries designed to support cross-platform development of security-enabled client and server applications. Applications built with NSS can support SSL v2 and v3, TLS, PKCS #5, PKCS #7, PKCS #11, PKCS #12, S/MIME, X.509 v3 certificates, and other security standards. Default Operating System module that manages applications loading NSS globally on the system. This module loads the system defined PKCS #11 modules for NSS and chains with other NSS modules to load any system or user configured modules. Network Security Services (NSS) is a set of libraries designed to support cross-platform development of security-enabled client and server applications. Applications built with NSS can support SSL v2 and v3, TLS, PKCS #5, PKCS #7, PKCS #11, PKCS #12, S/MIME, X.509 v3 certificates, and other security standards. Install the nss-tools package if you need command-line tools to manipulate the NSS certificate and key database. OpenLDAP is an open source suite of LDAP (Lightweight Directory Access Protocol) applications and development tools. LDAP is a set of protocols for accessing directory services (usually phone book style information, but other information is possible) over the Internet, similar to the way DNS (Domain Name System) information is propagated over the Internet. The openldap package contains configuration files, libraries, and documentation for OpenLDAP. OpenSSL is a toolkit for supporting cryptography. The openssl-libs package contains the libraries that are used by various applications which support cryptographic algorithms and protocols. Python is an interpreted, interactive, object-oriented programming language often compared to Tcl, Perl, Scheme or Java. Python includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems (X11, Motif, Tk, Mac and MFC). Programmers can write new built-in modules for Python in C or C++. Python can be used as an extension language for applications that need a programmable interface. Note that documentation for Python is provided in the python-docs package. This package provides the “python” executable; most of the actual implementation is within the “python-libs” package. This package contains runtime libraries for use by Python - the libpython dynamic library, for use by applications that embed Python as a scripting language, and by the main “python” executable - the Python standard library systemd is a system and service manager for Linux, compatible with SysV and LSB init scripts. systemd provides aggressive parallelization capabilities, uses socket and D-Bus activation for starting services, offers on-demand starting of daemons, keeps track of processes using Linux cgroups, supports snapshotting and restoring of the system state, maintains mount and automount points and implements an elaborate transactional dependency-based service control logic. It can work as a drop-in replacement for sysvinit. Libraries for systemd and udev, as well as the systemd PAM module. This package contains data files with rules for various timezones around the world. The util-linux package contains a large variety of low-level system utilities that are necessary for a Linux system to function. Among others, Util-linux contains the fdisk configuration tool and the login program. VIM (VIsual editor iMproved) is an updated and improved version of the vi editor. Vi was the first real screen-based editor for UNIX, and is still very popular. VIM improves on vi by adding new features and more. The vim-minimal package includes a minimal version of VIM, which is installed into /bin/vi for use when only the root partition is present. NOTE the vim-common package is installed. Zlib is a general-purpose, patent-free, lossless data compression library which is used by many different programs.
We can use yum or dnf to install updates on CentOS 7. In this tutorial we discuss both methods but you only need to choose one of method to install updates.
Install updates on CentOS 7 Using yum
Update yum database with yum using the following command.
sudo yum makecache
After updating yum database, We can install updates using yum by running the following command:
sudo yum -y install updates
Install updates on CentOS 7 Using dnf
If you don’t have dnf installed you can install DNF on CentOS 7 first.
Update yum database with dnf using the following command.
sudo dnf makecache
After updating yum database, We can install updates using dnf by running the following command:
sudo dnf -y install updates
How To Uninstall updates on CentOS 7
To uninstall only the updates package we can use the following command:
sudo dnf remove updates
References
Summary
In this tutorial we learn how to install updates on CentOS 7 using yum and dnf.
