Author Archives: Paul Norton

DCCP Linux Kernel local privilege escalation vulnerability (CVE-2017-6074)

A vulnerability has been found in the DCCP Linux kernel module which allows a local, unprivileged user to escalate privileges on a Linux system. DCCP is used to manage network traffic congestion in the application layer. This issue affects Red … Continue reading

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Red Hat 7 Get back eth Network Device Names

On installation of Red Hat or CentOS 7, boot the Anaconda installer with net.ifnames=0 parameter. On installer boot, hit the esc key. On the “boot” prompt, enter linux net.ifnames=0 and hit enter. The installer will now boot. Go into the network settings in the … Continue reading

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Dirty COW Red Hat/CentOS patches released

Patches to fix the Dirty COW vulnerability have been released by Red Hat and CentOS for RHEL/CentOS. The patch is presented as a kernel upgrade and should be applied as soon as possible. You can read more about this patch on … Continue reading

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Linux audit “Backlog limit exceeded”

If you’re running a busy Linux system, you may see the following error in your Kernel logs: “audit: backlog limit exceeded”. For example: To alleviate the message output in your logs, you can increase the audit buffer. Edit /etc/audit/audit.rules and … Continue reading

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Getting started with AWS – Elastic IP – Associating a Static IP

On the left side menu, under “Network & Security”, click “Elastic IPs”. On the main screen, click “Allocate New Address”. In the pop-up window, select “Yes, Allocate” Select the Elastic IP, click the “Actions” menu drop down, and select “Associate … Continue reading

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Getting started with AWS – Creating a CentOS 6 server (EC2)

Select top left menu Services > Compute > EC2 Under “Create Instance”, select “Launch Instance” Go to “AWS Marketplace”  and search for “centos”. Select “CentOS 6 (x86_64) – with Updates HVM” Choose an instance type. t2.micro is a good, cheap … Continue reading

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MySQL 5.6 “innodb_table_stats” not found

Fix this annoying error in MySQL 5.6 On systems that were upgraded from MySQL 5.5 to 5.6 (Oracle, Percona, etc.) – you may see the following error: Error: Table “mysql”.”innodb_table_stats” not found. Here’s a more complete example: 2016-06-14 15:08:03 7f82b3fff700 … Continue reading

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CentOS 6.8 Released

Along with the release of RHEL 6.8, the CentOS team have announced the availability of CentOS 6.8. You can read the Release Notes here.

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Red Hat Enterprise Linux 6.8 Released

Red Hat has released update 8 of RHEL 6. Read the press release here. Along with security updates, this release features the ability to expand the XFS file system to up 300TB, and the ability to create a deployable snapshot … Continue reading

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OpenSSL DROWN Vulnerability

Red Hat has released a new patch for OpenSSL which fixes some serious security vulnerabilities, particularly with SSL enabled websites. There’s currently an attack method that hackers are using on vulnerable systems called DROWN. You can read more about it … Continue reading

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