very serious security problem has been found in the virtual floppy drive QEMU’s code used by many computer virtualization platforms including Xen, KVM, VirtualBox, and the native QEMU client. It is called VENOM vulnerability. How can I fix VENOM vulnerability and protect my Linux server against the attack? How do I verify that my server has been fixed against the VENOM vulnerability? [click to continue…]
‘m a new Ubuntu Linux user. How do I install the LEMP stack on an Ubuntu Linux 14.04 LTS server using command line options to serve dynamic web apps? [click to continue…]
‘m a new Ubuntu Linux version 14.04 LTS user. I need additional swap space to improve my Ubuntu server performance. How can I add a swap space on Ubuntu Linux 14.04 LTS using command line over the ssh based session? [click to continue…]
ow can I analyze line rate taking log file as input on a Linux system? How do I find the IP flooding my Apache/Nginx/Lighttpd web-server on a Debian or Ubuntu Linux? [click to continue…]
buntu Linux version 14.04 LTS has been released. How do I upgrade to a newer version of Ubuntu 14.04 LTS from Ubuntu 13.10 or 12.04 LTS? [click to continue…]
‘m a new Ubuntu Linux user and my cloud hosting company installed MySQL server by default. I need to remove it and delete it from my server as I have no use of MySQL server. How can I uninstall MySQL on a Ubuntu based systems? [click to continue…]
‘m a new Ubuntu Linux user. This seems like a newbie question, but I can not seem to find examples to copy files on Ubuntu. How do I copy file to another directory on Ubuntu Linux using command line terminal application? How can I copy files via terminal on Ubuntu Linux desktop? [click to continue…]
am a new Ubuntu Linux version 12.04 LTS user. How do I stop or start iptables based firewall service on Ubuntu Linux using bash command line options? [click to continue…]
I am using Ubuntu 12.04.2 LTS (“precise”). I am trying to upgrade all packages using kernel via apt-get upgrade method. But, I am getting the following message:
Reading package lists… Done
Building dependency tree
Reading state information… Done
The following packages have been kept back:
linux-headers-virtual linux-image-virtual mysql-client-5.5 mysql-server-5.5
The following packages will be upgraded:
base-files dosfstools linux-libc-dev linux-libc-dev:i386
4 upgraded, 0 newly installed, 0 to remove and 5 not upgraded.
Need to get 1,847 kB of archives.
After this operation, 2,048 B of additional disk space will be used.
Do you want to continue [Y/n]?
How do I fix this issue and install linux-headers-virtual linux-image-virtual packages which have been kept back in Ubuntu Linux LTS version 12.04.2?
[click to continue…]
am trying to set exec-shield protection on Linux as described here
but getting the following error on Ubuntu Linux server version 12.04 LTS:
sysctl -w kernel.exec-shield=1
error: “kernel.exec-shield” is an unknown key
How do I fix this problem and make sure exec-shield buffer overflow protection security feature turned on Ubuntu Linux?
[click to continue…]