refused connection from x.x.x.x but iptables are flushed?
So I have a machine internally, I can ssh into it no problem. But when I try to ssh from outside it failed. Check the logs and it said refused connection from x.x.x.x (x.x.x.x) I check the iptables and...
View ArticleTiming out connecting to github when doing a knife command
Forgive the potential noobiness of this, but I think I've exhausted everything I can do on my own. I'm able to connect to github via ssh, I'm able to clone repos via command line with both https and...
View ArticleMounting to specific user.
so right now in fstab I have the followingfileserver:/home /home nfs default 0 0How can I do the following instead?fileserver:/home/<$user> /home/<$user>/storage nfs default 0 0part 2: ANd...
View Article224.0.0.1 in ufw logs ??
I am getting a fair number of syslog entries showing blocked input by 224.0.0.1. I have read that 224.0.0.1 is, "The All Hosts multicast group addresses all hosts on the same network segment." There is...
View ArticleHow to check if item is in list in puppet?
This is just for testing purposes, so the example might be bad but I just want to know how to do it. So in puppet i have `$test_list = ['machineA','machineB','machineC']How can I make write the...
View ArticleDocument repository software
Looking for suggestions on document repository software to implement at my company. Right now everything is stored on files shares with no indexing whatsoever and its a pain to search for...
View ArticleSquid server not denying access to the listed websites.
I edited the squid.conf file present in /etc/squid/ so that in.yahoo.com and youtube.com would not be accessible. Here is the squid.conf file:Recommended minimum configuration:acl manager proto...
View Articleunauthorized host while the host is in /etc/exports?
fileserver is a cenots6 fileclient is a centos7. In the fileserver I add the following line in /etc/exports/data/test/tester <$client_ipaddr>(rw,async,no_auth_nlm,insecure) then did exportfs -a....
View ArticleNeed clarity regarding SSSD+Kerberos to AD.
I'm a relatively new Linux sysadmin in a large windows environment with about 30 Linux servers that currently use LDAP+WINBIND.I've read a lot about SSSD, and I've been working to understand it and...
View ArticleQuestion: Slow cloning with KVM (virt-clone)
Hello, I've been having problems with virt-clone lately as it moves at a snail's pace and sometimes it seems like nothing is happening. I'm not sure what's happening but I do have some ideas. The image...
View ArticleWindows (Mostly) Admin Taking Linux Essentials
Not sure if this is the right place to ask this as it is really basic stuff, but does anybody have any tips for the LPI Linux Essentials?After Essentials I am thinking of taking the Linux+ for the...
View ArticleWhat is the recommended network admin tool that can summarize network traffic...
What tool would you recommend for gathering statistics by ports? For instance, I'd like to see for the last 24 hours how much traffic was made on port 80, port 22, and so on... submitted by...
View ArticleMoving web servers and mysql databases to Centos from Debian
So I was a Debian user till end of May both on desktop and the few minor/small servers I have/had.For the past year, I also hosted a few sites(wordpress blogs, tt-rss or owncloud for example) and...
View ArticleHow do you handle Linux Updates/Patches?
Do you use scripts? Configuration Management? Satellite/Spacewalk? Or do you do you practice immutable infrastructure, and simply replace old instances with new ones that have updates pre-baked (update...
View Articlehttps://www.reddit.com/r/linux_mentor/comments/4nq5il/what_to_do_after_homela...
HelloI've been wondering... when you have finished configuring your environment, what do you do to make it "alive" ? You have created virtual machines, configured webserver, mailserver, backup,...
View ArticleLinux lockfile explained, how to use them the easy or hard way
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View ArticleNeed help with configuration sync between two hosts
I have two hosts, let's call them Host A and Host B. These two hosts run in a VRRP configuration with Host A being the master of Application Instance A and the backup for Application Instance B. Host B...
View ArticleHow do I validate that my initrd has all of the modules it needs?
I have been trying to figure out how to boot an iso image all weekend https://sli.mg/HWhRd3.I can't tell of my boot line is wrong or if the initrd I borrowed doesn't have the things I need built in. I...
View ArticleHow to troubleshoot a random reboot?
A RHEL 5 server running on an old IBM blade randomly rebooted without warning the other day. I see no evidence of a kernel panic and /var/log/messages has nothing relevant. It seems like a hardware...
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