I don't understand Linux and MySQL memory usage
How can I determine how much MySQL is using for database caching?I'm working on a few virtual servers w/ MySQL installed. free and top shows that a large amount of memory is used on these servers,...
View Articlehttps://pthree.org is not accessible
Does anyone know how to contact Aaron Toponce? His site https://pthree.org/ is not accessible. I tried to access his contact info from a google cahced page, but since his contact info is encoded in a...
View ArticleCDNs and iptables
I have a Centos 6 box running as a router and squid proxy. Through squid I am directing users to a device handling a captive portal, so IPTABLES functions as my SSL walled garden service. Users making...
View ArticleHow to block websites using WebAdmin
Hi. I am trying to block facebook at my school. There is no daily tech support at school. I do my best to maintain the computers in the lab(antivirus, removal of games and other material, etc.) I am...
View ArticleHelp with Postfix Address Verification
I receive "Recipient address rejected: unverified address: mail transport unavailable" when sending to some friends using my new server. I do not receive the error when sending from my old server....
View ArticleLinux noob going to LinuxCon - asking for suggestions on which pieces to attend.
Howdy - my company is sending me to LinuxCon. It is probably not the most appropriate conference they could send me to based on my job role and experience, but I want to make the most of it. I'm...
View ArticleHow can I make a lockeddown or "minimal" user account?
Essentially I want to make a user account for amavisd to send e-mail alerts to instead of my own e-mail as it gets filled with "COntent filter" emails easily.How would I go about creating a user...
View ArticleMinimal SSH account, to access remotely and run commands
Hey, I currently use PHP and phpseclib, to login to root with ssh, and execute a couple of applications. Both applications are in a specific /etc/xxx/ folder. It now works perfectly with root, but...
View Articlesendmail sending spam
Hi!I need some advice regarding a problem I discovered today. I work mostly with windows-servers but I am also the semi-responsible for our one and only wordpress-server running on Ubuntu. The server...
View ArticleIs there a new Michael H. Jang book?
hey, guys I wanna ask if Micheal going to make a new book for RHEL 7 or no? cause I want to study for the RHCSA & RHCE .. And is there a good sources & books to study Linux administration ?...
View ArticleFrom Win Server to Linux - suggestions?
Hi all guys, i'm an IT admin and after 8yrs with Win Server i'm f****g sick of it and i want to change my career and start working with linux. I've always used linux but only from a user perspective,...
View Articlerecommend me a server distro
what would be a good distro to use that is at least semi current and offers at least newish packages while being mostly stable? was using debian testing for awhile but want to get away from it and,...
View ArticleCan you spare 20 minutes to answer 24 questions and help me understand your...
Hi /r/LinuxAdmin,You might think that I'm lost, but I'm posting here because I hope that this subreddit may have some guidance for me.I am a Program Manager on the Windows Server 2016 team researching...
View ArticleELI5 Modules and kernel updates. DKMS?
Can anyone ELI5 why some drivers do not carry over when the kernel is upgraded? I.E Why do we need to use DKMS? I'm asking for the e1000e driver for the intel NICS. submitted by No_Trouble_No_Fuss...
View ArticleLXC mounts and UID mapping
I was wondering if someone could help me out with the following:There is an unprivileged LXC container set up, and now I want a bi-directional share between the host and the container. I've got the...
View Articlebenefit of multiple tomcats on single host moved to docker containers?
Is there any? We currently have 6-8 (and soon to be more) tomcats running on a single VM with Java 8. There have been some memory issues in these apps before before. I am looking to potentially...
View ArticleLinux Foundation\edX.org Training--Essentials of System Administration (LFS201)
Has anyone taken the Linux Foundation\edX.org course LFS201 that is geared toward preparing people for the Certified Sys Admin exam? If so, I'd appreciate any feedback. It hasn't been rated yet on edX....
View ArticleAzure Linux (Ubuntu) VM issue with U/Group perms
So, this is strange as all get out. Moving our off-site Linux VM's from AWS and Azure, or rather trying to. Me and another of my guys are having a strange issue on the Ubuntu (both 12.04 and 14.04)...
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