Unix tips: Saving time by repeating history

By Sandra Henry-Stocker

Getting work done faster on the command line is one of the never changing goals of Unix sysadmins. And one way to do this is to find easy ways to reuse commands that you have entered previously – particularly if those commands are complex or tricky to remember. Some of the ways we do this include putting the commands in scripts and turning them into aliases. Another way is to reissue commands that you have entered recently by pulling them from your command history and reusing them with or without changes.

The easiest and most intuitive way to reissue commands is by using the up and down arrows on your keyboard to scroll through previously entered commands. How far back you can scroll will depend on the size of your history buffer. Most people set their history buffers to hold something between 100 and 1,000 commands but some go way beyond that. Hitting the up arrow 732 times might try your patience, but there are are fortunately easy ways to get what you need without wearing out your finger tip! To make this post a little easier to follow, I’m using a modest HISTSIZE setting. You can view your current history queue size using the command shown below

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From: Network World


Friday’s security advisories

By jake

Arch Linux has updated c-ares
(code execution) and wordpress (multiple vulnerabilities).

CentOS has updated python-twisted-web (C7; C6: HTTP proxy redirect).

Debian has updated wordpress (multiple vulnerabilities).

Debian-LTS has updated chicken
(two vulnerabilities), firefox-esr
(regression in previous security update), icedove (multiple vulnerabilities), and ruby-activesupport-3.2 (access restriction bypass).

Fedora has updated curl (F23:
code execution) and php-adodb (F24;
F23: SQL injection).

openSUSE has updated libgcrypt
(42.1: flawed random number generation), openjpeg (42.1: denial of service), and postgresql93 (13.2: two vulnerabilities).

Oracle has updated python-twisted-web (OL7; OL6: HTTP proxy redirect).

Red Hat has updated python-twisted-web (RHEL7&6: HTTP proxy redirect).

SUSE has updated pidgin (SLE11:
multiple vulnerabilities) and postgresql94 (SLE11: two vulnerabilities).

From: LWN


Early Benchmarks Of The Linux 4.9 DRM-Next Radeon/AMDGPU Drivers

While Linux 4.9 will not officially open for development until next week, the DRM-Next code is ready to roll with all major feature work having been committed by the different open-source Direct Rendering Manager drivers. In this article is some preliminary testing of this DRM-Next code as of 29 September when testing various AMD GPUs with the Radeon and AMDGPU DRM drivers.

From: Phoronix