How to Make DNF and YUM Save Downloaded RPM Packages

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DNF/YUM can automatically download the RPM packages and install them. Under some situations, we may prefer to make a copy of the RPM files for offline usage so that no need to have network connections to install the software packages. For such purposes, we need to make a copy of the RPM packages. It is
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How to exclude a package from a specific repository only in yum?

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This post https://www.systutorials.com/1661/making-dnf-yum-not-update-certain-packages/ introduces how to exclude a package from yum. But is it possible to exclude a package from a specific repository only? For example, a repository R1 I am using contains an updated version of gdb while I don’t want to use the gdb from it as I trust the version (although older)
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How to install alien on CentOS 7 to convert .deb to .rpm?

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How to install the alien command on CentOS 7 to convert .deb to .rpm? alien is already in EPEL and it makes it quite easy to install it in CentOS 7. First, enable EPEL following this tutorials. Then, install alien by # yum install alien Then alien should be ready: # yum info alien Installed
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How to install gfortran on CentOS 7?

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How to install the gfortran fortran compiler on CentOS 7 Linux? gfortran on CentOS 7 is provided in the gcc-gfortran package. You may install it to install gfortran. # yum install gcc-gfortran Loaded plugins: fastestmirror, langpacks Loading mirror speeds from cached hostfile * base: ftp.cuhk.edu.hk * epel: ftp.cuhk.edu.hk * extras: centos.01link.hk * nux-dextop: li.nux.ro *
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How to disable the fastestmirror yum plugin in CentOS 7 Linux?

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How to disable the fastmirror yum plugin in CentOS 7 Linux? The fastestmirror function of yum is provided by the package `yum-plugin-fastestmirror`. However, because `yum` depends on it, the `yum-plugin-fastestmirror` package can not be removed. If you try to remove it, `yum` will report failures like. # yum remove yum-plugin-fastestmirror Loaded plugins: fastestmirror Resolving Dependencies
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How to add PHP DOMDocument extension to httpd in CentOS 7?

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Just migrated a PHP site to a new server. However, in /var/log/httpd/error_log, there are errors like [:error] [pid 2810] [client 61.92.242.24:43372] PHP Fatal error: Class ‘DOMDocument’ not found in /var/www/…/some.php on line 16 How to add PHP DOMDocument extension to httpd in CentOS 7? You need to install the package php-xml to have DOMCoument support
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How to make iptables/ip6tables configurations permanent across reboot on CentOS 7 Linux?

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How to make iptables/ip6tables configurations permanent across reboot on CentOS 7 Linux? CentOS 7 uses FirewallD by default. If you would like to manage iptables/ip6tables rules directly without using FirewallD, you may use the old good iptables-services service which will load the iptables/ip6tables rules saved in /etc/sysconfig/iptables and /etc/sysconfig/ip6tables when it is started during boot
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How to upgrade vim to version 8 on CentOS 7?

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vim on CentOS 7 is version 7.4 with patches 1-160: $ vim –version VIM – Vi IMproved 7.4 (2013 Aug 10, compiled Dec 21 2016 17:00:20) Included patches: 1-160 How to upgrade it to version 8 which is the latest major version? Update on Oct 23 2018: the repository introduced in the original method is
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How to install encfs on CentOS 6?

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I noticed your answer on configuring encfs on CentOS 6. I had difficulties installing encfs on CentOS 6. How did you install it? Thanks. For CentOS 6, I used a slightly old version (version 1.7.4) using an RPM built for by PUIAS: For x86-64 version: # yum install http://puias.princeton.edu/data/puias/6/x86_64/os/Addons/fuse-encfs-1.7.4-1.puias6.x86_64.rpm For i686 version: # yum install
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How to remove the bottom panel in gnome 3 classic?

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The gnome 3 classic’s bottom panel looks not useful to me. I do not use it. How to remove the bottom panel in gnome 3 classic? That bottom panel is from the “Window List” plugin. The gnome 3 classic package depends on that plugin package on CentOS 7 as far as I checked. And Gnome
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How to set up HP printer and scaner on CentOS 7?

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How to set up the driver for an HP all-in-one printer/scanner on CentOS 7 Linux? First, install these packages and it may ask you to download and install other plugins. Without these packages, my printer does work. # yum install hplip hplip-gui hpijs Second, install plugins for the HP printer. # hp-plugin Then you can
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How to install sshfs on CentOS 7?

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sshfs is a nice tool. But it seems there is no support to it in a newly installed CentOS 7 Linux system: Not installed by default: # sshfs -bash: sshfs: command not found Seems not available from the repositories # yum install sshfs -y Loaded plugins: fastestmirror Repodata is over 2 weeks old. Install yum-cron?
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How to install aclocal on Fedora Linux?

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I tried to build a project while it reports: # ./autogen.sh Can’t exec “aclocal”: No such file or directory at /usr/share/autoconf/Autom4te/FileUtils.pm line 326. autoreconf: failed to run aclocal: No such file or directory How should I handle this? How to install aclocal? yum install aclocal shows: No package aclocal available. Error: Unable to find a
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How to install glibc, glibc-common and GD libraries independently?

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I already have PHP and nginx installed and running on my on centOS 6.7. Please guide me, how can install glibc, glibc-common and GD libraries independently on my centOS 6.7 without crashing my system? I am not sure how you installed PHP and nginx. If they are installed from CentOS6.7’s Yum repository, you may install
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How to install Chrome on Fedora Linux?

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How to install the Chrome browser on Fedora Linux from Google? Google provides a repository for yum/dnf on Fedora. First, following http://www.systutorials.com/3471/additional-repositories-for-fedora-linux/#google-chrome-repository to add Google Chrome repository. Then, you can install Google Chrome by yum/dnf: # dnf install google-chrome-stable

Required packages for building YouCompleteMe for Vim on Fedora 21

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YouCompleteMe for Vim on Fedora 21 reports this error: [zma@laptop:~/.vim/bundle/YouCompleteMe]$ ./install.sh — The C compiler identification is GNU 4.9.2 — The CXX compiler identification is GNU 4.9.2 — Check for working C compiler: /usr/bin/cc — Check for working C compiler: /usr/bin/cc — works — Detecting C compiler ABI info — Detecting C compiler ABI info
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