Issue How to change the boot order in RHEL 7 / CentOS 7 / OEL 7 How to set default boot to windows on Dual boot on the above environments. Solution In boot menu, the number starts with 0, so the 3rd selection will have the number 2. so to set the 3rd kernel in […]
How to Change the boot order in grub2 RHEL / CentOS 7 Read More »
Issue How to set hostname in CentOS-7 / RHEL-7 persistent across reboots. – I have changed /etc/hostname and it changes after reboot. Solution In CentOS / RHEL-7 you need to use the hostnamectlcommand line tool to update the hostname – To set the hostname permanently, issue the below command, hostnamectl set-hostname server1.jobnix.in To view the
CentOS / RHEL – 7 How to set hostname permanently Read More »
Issue How to check my cPanel / WHM server IPs against RBL ? How to prevent my mail server IPs from being blacklisted ? My cPanel server IP is blacklisted. I need an email alert on blacklisting my IPs ! Solution You can install the below script in /etc/cron.hourly or via crontab entry. Make sure
RBL Blacklist check script with email alert – cPanel / WHM – Mail Servers Read More »
Issue – Git doesn’t work after upgrading Mac OS to X El Capitain – Output when you run git xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun Solution – run the following command as a user xcode-select –install – This will pop-up a window and continue with it. – Once finished, run
Git doesn’t work after upgrading Mac OS X El Capitain Read More »
Issue You have an OpenVZ VPS and you are getting the following error. [root@vps ~]# cat /dev/net/tun cat: /dev/net/tun: No such device Fix Makes sure you have TUN / TAP enabled on the Hardware node. lsmod | grep tun If it didnt return anything, run the below and make sure the module is loaded. lsmod
Enable TUN / TAP in OpenVZ Read More »
Issue How do i select the folders ti sync from Gmail / Google Apps to Mac OsX Mail client. How do i unsubscribe Folders from syncing with OsX mail app from Google Apps. How do i unsubscribe **SPAM** folder from syncing with OsX mail app from Google Apps. Solution Login to your Gmail / Google
macOS mail client with Gmail – Disable / unsubscribe syncing a folder Read More »
Issue usbhid couldn’t find an input interrupt endpoint The server is showing the above error and not booting at all. Some systems will give you a blinking booting window. Resolution * Remove all the USB device like Keybord and Mouse. * Restart your server Effected Systems RHEL 5, RHEL 6, CentOS 5, CentOS6 tag: usbhid
usbhid couldn’t find an input interrupt endpoint Read More »
###Issue How can i fix FREAK Vulnerabiltity on my server ### Effected Versions * All RHEL / CentOS Versions including 7 ###Solution * run the below yum update command to update `yum update -y openssl` ####Disable EXPORT ciphers in httpd * Change the below in you `/etc/httpd/conf.d/ssl.conf` file. `SSLCipherSuite HIGH:!aNULL:!MD5:!EXP`
How to fix / Patch FREAK vulnerability on my server Read More »
Issue I need to give permission to my develper to specific sudo command only. I need to give permission to restart apache httpd service. Versions Any Linux Flavour. CentOS, RHEL, Ubuntu , SuSE etc Solution run visudo to get the sudo access editor. add the below line to the file and save and exit mydeveloper
Allow a user to run specific sudo command only Read More »
Issue CentOS 6/7, RHEL6/7 with XFS file system My / Filesystem is full I have extended the size from VMware datastore or SAN LUN Note Reboot is necessary (6/7) if it is an OS parition ie /. Makesure you have a backup / snapshot of the `sda` disk Solution In this example, we are assuming
How to Extend the partition after extending it from VMware / SAN Read More »
