Handy script I wrote for pulling IPs from auth.log and adding them to...
Before I got fail2ban working properly after moving my server, I had tons of failed attempt logins to the root (disabled in sshd.conf lol) account. It got annoying watching those pile up, so I found a...
View ArticleSpacewalk errata import questions
I've setup a spacewalk 2.0 server to manage centos 6x base, centos 6x updates as well as others. The repos synced great, but after importing the errata for my centos 6x update repo, there are only 13...
View ArticleBest OpenLDAP Books / Guides?
Hey guys, I have a basic OpenLDAP setup running in a test environment. I have integrated a few apps with it and such, but feel like before I start using it in my production environment I really need...
View Article[SLES] Manually updated fstab and menu.lst but still cannot boot cus Could...
I ran a p2v on a prod server. When trying to boot, i get OS menu. It starts to load, but errors with Could not fin /dev/disk/by-id/ **diskid**. I found an article saying I should update the fstab and...
View ArticleLdap to AD do I still need winbind
I'm trying to figure out if I need to install samba/winbind to be able to pull ad users. I know ad offers uid tagging but want to avoid adding or modifying samba especially on servers in...
View ArticleTo partition or not partition. That is the the question. What is considered...
In raid, lvm, or monolithic file systems, is it considered standard practice to RAID/PV/Format across partitions (sda1, sdb1, sdc1) or is it best to just use/format the block device itself (sda, sdb,...
View ArticleOpening the gates of Olympus to the Sysadmin Gods
I created this subreddit as a farce against /r/pcmasterrace idiots. I had a bad time trying to explain how the gaming industry works from the inside, how chips are market segmented, etc. Then I...
View ArticleServer Firewall... why?
Hello, i have a question. Whenever i read something about linux server security there is always a recommendation to restrict remote access to required services like ssh or http(s) etc. Question is:...
View ArticleI'm considering a career change from science to IT (long)
Backstory: I have a Bachelor's of Science in Microbiology/Biotech. After 2 years in the field, and talking to my superiors and my other contacts, I have become a bit unsatisfied with my career choice,...
View ArticleSearching for something to specialise in
Being pretty new to the Sysadmin game (my previous job, which I loathed, was as an investment analyst at a big international bank - now officially a "Trainee Linux Systems Engineer") I'm not too sure...
View ArticleHelp with openssl and rc4
I'm trying to use the command line openssl enc program to decrypt some text. The encryption is happening on another computer but I'm not sure what options it's using. If I got to this site...
View ArticleWhat do you use to manage passwords in Linux Desktop?
When I'm on a Mac, I use 1Password, but it does not have Linux client - you can still read passwords using 1PasswordAnywhere, but that doesn't cut it, so I'm looking for a Linux/Mac compatible...
View ArticleLinux Sysadmin Course Live in NYC
Over the last few years I have learned a lot about Linux System Administration, and this industry as a whole. I have worked for several different types of companies, from startup to Fortune 500 and...
View ArticleSuggestions for an Ubuntu carddav caldav server? Baïkal or Apple? Why do I...
Thank you for your help. Since my last post, I've setup my first VPS, edited IP tables and setup SSH certs. I screwed up some things, fixed them, migrated the fixed VPS to a new location, then broke...
View ArticleQuestion about SQUID and how network services are handled.
Hello all.Few days ago I created a SQUID transparent server. Looks good so far. Requests for http go through the proxy server (verified via the logs). However, I am buffled with something.The client...
View ArticleQuestion about yum in Centos (6.5)
I am trying to create a yum repository in order to point my other machines to it instead of having all of those machines going on the Internet to fetch the packages.I am trying to understand the...
View ArticleGenerate or import GPG key for specific user?
Say if I have an ubuntu user that executes the Chef recipes, and that user is attempting to import the GPG key for a different user, would that work or, am I a total idiot? I need to be able to import...
View ArticleSpam Filtering with postfix
I would like to replace our broken and outdated incoming email servers with Amazon Linux instances running postfix. The major purpose of these servers would be to filter mail for both spam and viruses....
View ArticleLinode migration resulted in SSH certificates not working. I still have root...
Hello again. I successfully setup a Linode VPS with Ubuntu 13.10 in their location in Japan. (Romantic reasons, don't ask.) After experiencing a laggy terminal, the server was migrated to London (I'm...
View ArticleGuide for Linux network capacity and troubleshooting?
I have been looking for a while rather unsuccessfully for a guide on troubleshooting generic network configuration problems. Alot of these problems seem to stem from capacity issues on the interface...
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