Hello 🙂 If you are here with the below error, and you are trying to install Hyper-V on a VM for testing purpose, you are at the right place. Error Hyper-V can not be installed: The hypervisor is already running We know that it is not recommended to run Hyper-V inside a VM, and it […]
How to Install Hyper-V on a Virtual Machine VM Read More »
Today i was installing Jenkins on a CentOS7 systems. After installing it via Jenkins yum repository, the service was not stating. The java was already installed on the server. Issue You have installed jenkins on a CentOS7 / RHEL7 system. jenkins is not starting via systemctl start jenkins command, and it is throwing journalctl -xn error. Caused
Jenkins not starting on CentOS 7 / RHEL 7 Read More »
Issue You are trying to mount an NTFS partition and the console is throwing the below error. Let’s see how to fix this. The disk contains an unclean file system (0, 0). Metadata kept in Windows cache, refused to mount. Failed to mount ‘/dev/sda3’: Operation not permitted The NTFS partition is in an unsafe state.
The disk contains an unclean file system (0, 0). NTFS error on Linux Read More »
We are a big fan of OpenVPN when it comes to security. Many organizations have already switched to OpenVPN from PPTP etc. NixVPN is my favorite VPN software to host it on a standalone instance. But what if, if you already have a server protected with CSF firewall, and you want to install OpenVPN by
OpenVPN with CSF firewall rules Read More »
Lets see how we can configure a secure FTP server on CentOS RHEL 6 / 7 First, you need to install the vsftp package on your server yum install -y vsftpd Once installed, lets start editing the configuration file, vim /etc/vsftpd/vsftpd.conf Line #12 disable anonymous FTP access, with the below configuration change. anonymous_enable=NO Chroot / Jail FTP
VSFTP chroot jail users – Limit FTP users access to home directory Read More »
Some times you need to disable sudo su – access on your environment so that the users will use sudo command always and they will not switch to any other users account unnecessarily Lets see how to do it Edit the /etc/suoders by running visudo visudo Add the below Command Alias Cmnd_Alias BLOCKSU = /bin/su
Disable SU access for sudo users Read More »
Sometimes it’s necessary to log all the sudo commands run in your environment. Let”s see how to achieve this. Edit the sudoers file by running visudo visudo Add the below line to the Defaults section Defaults logfile=/var/log/sudo Now all the commands from a sudo user will be logged in /var/log/sudo file. [root@awsadminz ~]# cat /var/log/sudo Jan 11
How to log all sudo commands Read More »
AWS has announced immediate availability of the new Europe (London) Region. The London Region joins Ireland and Frankfurt as AWS’ third European location, and provides the customer with a new option for hosting applications benefiting from infrastructure located in Europe. AWS is now operating sixteen regions worldwide, bringing the total number of AWS Availability Zones
AWS Announces Immediate Availability of London Region Read More »
How to clear memcache and redis without restarting service. Clear Memcache telnet 172.25.16.191 11211 Trying 172.25.16.191… Connected to 172.25.16.191. Escape character is ‘^]’. flush_all OK quit Connection to localhost closed by foreign host. Clear Redis Cache [root@memcache ~]# redis-cli -h 172.25.16.191 172.25.16.191:6379 > flushall OK
How to clear Memcache and redis without restarting the service Read More »
Dropbox is sending out the below email to all Dropbox users with new MacOS Sierra. The mail is received by those who are using Dropbox folder in MacOS Documents. You have 2 options to avoid any dataloss. Disable iCloud Sync of Documents Folder Move your Dropbox folder from Documents to home directory. Sample email below Hi Admin,
Dropbox and iCloud compatibility issue Read More »
