Recent Posts

April, 2015

  • 24 April

    RHEL – 7 Network Management – nmcli or nmtui

    nmlci is a wonderful command to configure the network profiles on Redhat Enterprise Linux 7.  nmcli also supports the command completion function by pressing “tab” key but still you need to use the quotes properly.  nmtui is an alternative command for nmcli which is based on “Text User Interface”.  It will be useful for RHEL-7 Beginners but experienced system administrators …

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  • 22 April

    RHEL – 7 Managing the network with Network Manager

    In the last article, we have seen that how to review the current network configuration in RHEL 7. Redhat has introduced the profile based network management on Redhat Enterprise Linux 7. Network manager is a daemon that monitors and manages the network settings. Network manager can be managed using nmcli and other graphical tools. These tools will automatically update /etc/sysconfig/network-scripts  in the …

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  • 21 April

    RHEL 7 – Networking overview

    Redhat has made a lot of changes in the RHEL-7’s networking part. In Red Hat Enterprise Linux 7, the default networking service is provided by NetworkManager, which is a dynamic network control and configuration daemon that attempts to keep network devices and connections up and active when they are available. The traditional ifcfg type configuration files are still supported.  To view the current network …

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  • 18 April

    Redhat Enterprise Linux 7 – systemd targets

    Redhat Enterprise Linux 7 ‘s booting process also modified lot when you compare to the earlier versions. Instead of grub ,we have grub2 in RHEL 7  to boot the system. The boot loader loads the configured kernel and initramfs from disk to memory. An initramfs  is a gzip-ed cpio archive containing kernel modules for all hardware which required at boot, init …

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  • 16 April

    Service Management (systemd) – RHEL 7

    Prior to Redhat Enterprise Linux 7 operating system, init was the process which is responsible for activating the other services in the system. There were daemons and many system V LSB scripts were started at the boot time. These are mostly likely the shell scripts which resides under the /etc/init.d directory and called on the different run levels. But this system has lot of …

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  • 15 April

    RHEL 7 – Graphical User Mode(GUI) is not coming ?

    When you install the Redhat Enterprise Linux on datacenter, we will be not be installing with gnome packages by default. But in some cases, you may need graphical user mode. So you have to install the gnome packages and it’s dependencies to bring the system in to GUI. In my case , I have installed the RHEL 7 without installing the GNOME packages. Let’s …

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  • 14 April

    How to create the yum repository on RHEL 7 ?

    There is no much difference in package management  in  RHEL 7 when we compared to RHEL 6 . We can set up the yum repository using the DVD or you can dump the DVD contents to the filesystem and set-up it. Later on , you can make that filesystem to be available on other systems using http or ftp to make the current …

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  • 14 April

    How to edit the grub on RHEL 7 ?

    The default boot loader in Redhat enterprise Linux 7 is grub2(GRand Unified Bootloader2).  The  “grub2” supports almost all the operating systems. The main configuration file for grub2 is /boot/grub2/grub.cfg.  If you want to make any configuration change on the grub menu , you need to use the utility called “grub2-mkconfig” . If you manually edit the grub.cfg using vi or …

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