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Category Archives: Centos 7

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Sound Applet In Control Panel Only Lists “Dummy Output”

Software Effect Enterprises, Inc Posted on April 30, 2018 by SEEIApril 30, 2018

….and you have no sound Fix: Start a bash prompt and as the user who is having problems (Not root or su –  !!) run the two following commands pulseaudio –kill pulseaudio –start –log-target=syslog Your outputs should be back Applies … Continue reading →

Posted in Centos 7, Gnome 3

Bind 9 and Selinux issues

Software Effect Enterprises, Inc Posted on April 19, 2018 by SEEIApril 19, 2018

System: Centos 7 running bind-chroot-9.9.4 and Selinux enabled Secondary zone files when transferred have the following entry  in /var/log/messages Apr 19 12:43:16 ns1 named[3892]: transfer of ‘1.10.10.in-addr.arpa/IN’ from 10.10.1.40#53: connected using 10.10.2.4#56641 Apr 19 12:43:17 ns1 named[3892]: zone 1.10.10.in-addr.arpa/IN: transferred … Continue reading →

Posted in Centos 7, named/bind

SNMP v3 and Cacti

Software Effect Enterprises, Inc Posted on June 13, 2017 by SEEIMarch 31, 2018

A quick synopsis on setting up a Cisco ASA and a Centos 6 or 7 system to use SNMP v3 to be monitored by Cacti Cisco ASA en conf t # create a snmp-server group (needed for SNMP v3) # … Continue reading →

Posted in Cacti, Centos, Centos 6, Centos 7, Cisco ASA, Linux, SNMP

Signal Private Messenger for Centos 7

Software Effect Enterprises, Inc Posted on March 29, 2018 by SEEIMarch 29, 2018

I found an RPM here for Centos 7 for Signal Private Messenger Create a file named /etc/yum.repos.d/luminoso-Signal-Desktop.repo and put the following in the file [luminoso-Signal-Desktop] name=Copr repo for Signal-Desktop owned by luminoso baseurl=https://copr-be.cloud.fedoraproject.org/results/luminoso/Signal-Desktop/epel-7-$basearch/ type=rpm-md skip_if_unavailable=True gpgcheck=1 gpgkey=https://copr-be.cloud.fedoraproject.org/results/luminoso/Signal-Desktop/pubkey.gpg repo_gpgcheck=0 enabled=1 enabled_metadata=1 … Continue reading →

Posted in Centos 7

Packages needed for Centos 7 to connect via PPTP

Software Effect Enterprises, Inc Posted on January 11, 2018 by SEEIJanuary 11, 2018

yum -y install NetworkManager-l2tp-gnome ppp pptp pptp-setup

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Posted in Centos 7

Gnome 3 icons are huge!

Software Effect Enterprises, Inc Posted on September 23, 2017 by SEEISeptember 27, 2017

I updated my desktop machine to Centos 7.4 and my desktop icons were suddenly huge! After a bit of plugging around I found the fix Find the application “dconf Editor” under Applications – System Tools * Drill down to org … Continue reading →

Posted in Centos 7, Gnome 3

Battery and power status on your CentOS Linux laptop

Software Effect Enterprises, Inc Posted on September 5, 2017 by SEEISeptember 5, 2017

The upower cli tool will get you a large amount of information about power and batteries in your system. Install upower using the command yum -y install upower To enumerate the devices upower can get information about on your system … Continue reading →

Posted in Centos 7

Access the Centos 7 Virtual Machine Manager Console Without Using the Root Password

Software Effect Enterprises, Inc Posted on September 4, 2017 by SEEISeptember 4, 2017

Create  a file named /etc/polkit-1/localauthority/50-local.d/50-org.libvirt-group-access.pkla and put the following lines in it [libvirt group Management Access] Identity=unix-group:libvirt Action=org.libvirt.unix.manage ResultAny=yes ResultInactive=yes ResultActive=yes Create a group name libvirt (if it does not already exist) groupadd libvirt Put each user who needs access … Continue reading →

Posted in Centos 7

Gnome 3 Tricks for Centos 7

Software Effect Enterprises, Inc Posted on April 19, 2017 by SEEIAugust 31, 2017

I started using Gnome 3 on Centos 7 because the bluetooth support was not complete in Mate. I discovered several items to make it work better. yum install gnome-shell-browser-plugin This will allow you to easily install the gnome extensions from … Continue reading →

Posted in Centos 7, Gnome 3

Change default port number for Telnet in Cenots 7

Software Effect Enterprises, Inc Posted on July 23, 2017 by SEEIJuly 23, 2017

First – install telnet on Centos 7 yum -y install telnet-server Edit the file /usr/lib/systemd/system/telnet.socket The section [Socket] has by default [Socket] ListenStream=23 Change 23 to the desired port number. Then systemctl enable telnet.socket systemctl start telnet.socket Firewalld for Telnet … Continue reading →

Posted in Centos 7 | Tagged Centos 7, telnet

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