Ubuntu - expire gpg key

When we have a problem with expire gpg key

ansible - ping

 ansible communicates via ssh....We need ssh keys to connect. (When we don't have join via ssh keys, ansible will not work)

Installation ansible on Centos8

 Installation ansible on Centos8:

notes: ssh and networking

 notes: ssh and networking

script for routes RHEL

Bash script for adding routes to configuration files at RHEL, Oracle Linux, Fedora...

How to add module permanently?

 How to add module permanently?

inxi: list of system info

 Inxi is basic tool for information about server.

uname -mrs

 Uname is very good tool for checking version of kernel. 

How to install zabbix on Centos 8?

 Zabbix is monitoring tool. Step by step installation of zabbix.

lstopo

 Do you need topology of the system? Please use tool lstopo!

powertop on centos8

Powertop is the other monitoring tool to cli in linux. 

Suse - default gateway

Network configuration on Suse Linux is very very ...entertainment. 

systemctl enable --now

 systemctl enable --now 

- enable and start together: 

ntop on centos8

Installation of ntop on Centos8. If you want you can use via bash script.

How to install and configure monit on Centos8:

 How to install and configure monit on Centos8:

chmod and verbose

 chmod -v is verbose for chmod.

hpasmcli

 Sometimes we need information about hw. If we have hw from HW we can use command hpasmcli. How works? 

chmod -x /usr/bin/chmod

How to repair chmod with permission denied? 

epel repo

script for install epel repo

Check processors on linux

 Check processors on linux: 

creating bonding via dhcp

 CREATING BONDING

encfs on centos

 How to install encfs on centos? We need epel repository, fuse library and we can start. 

nmon - tool for performance

Great tool for performance is nmon. We can check cpu, memory, disks, kernel, network, etc. Let's try!

bash script: compile kernel

Script for compile kernel