Glibc: GHOST Vulnerability Test To See If a Linux Sever Is Secure

T he GHOST (CVE-2015-0235) is serious network function vulnerability in Glibc. How do I check and test if a my Linux based server is secure using command line options?   There are two methods to…

Ubuntu Linux: Edit and Open Files That Require Administrator Privileges

T here are certain files in Ubuntu Linux (or Unix-like systems) that only root user access or edit. How can I edit and/or open files that requires admin (root) access on a Ubuntu Linux?  …

FreeBSD Unix Find Out Which Programs Are Listening On a Given Port Number

I ‘m a new FreeBSD Unix system user. How can I find out the process/programs names listing on a certain port on a FreeBSD Unix systems using command line? How do I lookup the process…

How To Patch and Protect OpenSSL Vulnerability # CVE-2015-0291 CVE-2015-0204 [ 19/March/2015 ]

O n 19th March 2015, multiple high and moderate severity level vulnerabilities released in OpenSSL, a Secure Sockets Layer toolkit used in a Linux and Unix-like systems. How can I fix these vulnerabilities on a…

Debian/Ubuntu Linux: Find If Installed APT Package Includes a Fix/Patch Via CVE Number

I am a Debian Linux server user. How do I view the changelog of an installed package and find out if given CVE includes a fix or patch? How do I see a fix or…

How To Patch and Protect OpenSSL Vulnerability # CVE-2015-0291 CVE-2015-0204 [ 19/March/2015 ]

O n 19th March 2015, multiple high and moderate severity level vulnerabilities released in OpenSSL, a Secure Sockets Layer toolkit used in a Linux and Unix-like systems. How can I fix these vulnerabilities on a…

Debian/Ubuntu Linux: Find If Installed APT Package Includes a Fix/Patch Via CVE Number

I am a Debian Linux server user. How do I view the changelog of an installed package and find out if given CVE includes a fix or patch? How do I see a fix or…

RHEL / CentOS Linux 7 Enable Ping Access In Docker Container

I’m using RHEL 7.1-4 container on a RHEL /CentOS Linux 7.x server. However, I’m unable to ping external site/IP address using the ping command. I’m getting the following error on screen: ping: Operation not permitted…

How To Patch and Protect Linux Server Against the VENOM Vulnerability # CVE-2015-3456

A 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.…

Debian/Ubuntu Linux: Restrict an SSH user session to a specific directory by setting chrooted jail

I setup a web-server. I need to grant a user ssh access but I do not trust users. How can I limit user session to a specific directory such as /home/httpd/$USERNAME? How do I set…