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. #!/bin/sh source /home/oracle/.bash_profile ############ VARIABLES ############## SERVER=”MyServer – `ip addr | grep […]
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 current spaces in system by using command df […]
Sometime you will need to increase space fo swap space in Linux – and for that isn’t needed to add new disk or to restart server – if you have enought free space on current environment you can use some amount of that server for extendinx swap. In this tutorial we will use variables for […]
With next commands you will disable firewalld, install iptables services and enable them for starting with system. sudo systemctl stop firewalld sudo systemctl disable firewalld sudo yum -y install iptables-services sudo systemctl start iptables sudo systemctl start ip6tables sudo systemctl enable iptables sudo systemctl enable ip6tables
The following script alerts you when any of your HDD partitions is almost full. For email sending you need to have mailx installed (in CentOS: yum install -y mailx). #!/bin/sh MAX_ALLOWED_USAGE_IN_PERCENTAGE=90 ALERT_SEND_TO=”nekimail@example.com” HUMAN_FRIENDLY_SERVER_NAME=”MYSERVER – `hostname -I`” if [ -n “$(df -P | awk “{ df=strtonum(\$5); if (df > ${MAX_ALLOWED_USAGE_IN_PERCENTAGE}) print; }”)” ] ; then echo […]
In this example we will do export of one table but with data only (without metadata – constraint, index, trigger, statistics, grants) but only for specific date range (older than 01/01/2017) based on date in some table column and then import of that ranged table to some other scheme/user. If source and destination scheme/user are […]
By default you dont have date-time information in output from command “history” in terminal but you can set that by using one variable in .bash_profile or profile file. Unfortunately this cannot be used for already recorded commands in history – they will have date-time info but it will be hard-coded to date-time when you set-up […]
SFTP (SSH File Transfer Protocol or Secure File Transfer Protocol) is network protocol for fafe transfer and access to files over network – so nobody cannot sniff traffic between you and server in ManInTheMiddle scenario. In this task we need to create SFTP server on CentOS 7 Minimal Linux, with two chrooted SFTP users with […]
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Here is manual how you can reset forgotten root password on VMware ESXi, without reinstall of whole system and other shit. Reset will require rebooting of server so please before any action backup everything important from VM’s in VMware ESXi and do a regular shutdown of services and virtual machines over ssh/RDP or other remote […]
