No matter how much knowledge and experience you have with almost everything from IT side - when you go to a job interview, you can expect unexpected questions, and when I said "unexpected questions" and I'm not thinking about most stupid questions on planet like "Where do you see yoursel ...

Libvirt is API, daemon and tool for managing of virtualization platforms and virtual interfaces and it0s used by some GUI or CLI (virsh) interfaces - but for standalone virtual machines who will don’t have any other virtualization inside (dockers, lxc...) it's уuseless so I do a remove i ...

With this crontab-ready script you can check CPU/RAM/IO/Load/HDD usage with monthly averages (except for hard disk usage). Script is based on sar command - and sar is part of sysstat package - so if you dont have it installed - install it (on CentOS: yum install sysstat). This script ...

With this script you can check, for example - for every hour in alert log is there some new ORA errors, and in case new errors are generated, you will receive email notification about. Of course if AlertLog is too big (for example bigger than 2GB), you can archive it (rename je safe opti ...

In this tutorial we will install Oracle 12c software (in this case version 12.2.0.1) but without database, software only. Even if it looks like very complex install here - it isn't, this is simplified with some variables and with some extra options like firewall settings, checking of fre ...

For file sharing on Linux systems where is access needed from Windows machines, Samba is default solution and it have a pretty good system for managing users, but is not recommended to use on public servers, but only on the intranet sites of the companies. In this article we will install ...

Mailx or mail (mail is just a symlink to mailx) is standard email client for email sending from server with alert message. In this tutorial we will send email with mailx and using Google/GoogleApps SMTP server for email sending from CentOS (I guess it's the same on all Linux distros). Co ...

In this tutorial we will install latest mutt (on day: 31/03/2017) from source, configure it only for email sending (no receiving or other thing) over SMTP and with SSL and use it. We doing this in CentOS 7 Minimal Linux so maybe some of packages you already have. Create new .muttrc c ...

You can run this script as a any Oracle db user and as a oracle Linux user, and you can put this script to your crontab for daily checks. Also, you will get email when DB is not started because of any reason. Run sctipt on this way:

In this example we will extend one LVM partitotion for 120GB which is size of newly added hard disk. vom primeru proširićemo jednu LVM particiju za 120GB koje je veličine novododati disk. Before any 'gameplay' with disk recommendation is to make data backup first. First lets check cur ...