Quantcast
Channel: linuxadmin: Expanding Linux SysAdmin knowledge
Browsing all 17810 articles
Browse latest View live
↧

Self studying for RHCE, a question about NFSv4

I've tested this with SL 6.0 and CentOS 6.2. If I put say "/home *(rw)" in exports, and start the NFS server, open up JUST tcp 2049 (nothing else), I can mount it over NFS4. I don't have to run rpcbind...

View Article


Problems bridging networks with Virt-Manager in RHEL/CentOs

~Cross posted from OCN~ Hey all, I'm having a bit (read: massive amounts) of trouble trying to bridge the network between my physical host (CentOs) and my VM (also CentOS) using virt-manager. I...

View Article


Does anyone have any protips that will help newer admins? I will start by...

I sometimes have to backup a lot of data from users that move out of the university that I work at. Rsync tends to be very slow and serial at transferring data. I user globus-url-copy from the [Globus...

View Article

in which Cisco SACK'd iptables

submitted by anderbubble [link] [2 comments]

View Article

In which Puppet broke DNS queries

submitted by anderbubble [link] [13 comments]

View Article


Question about using quotas in Linux (Debian)

Hi all, I've got a server that is being used as a temporary file dump for users while we rearrange some other boxes. I'd like to be able to monitor disk space usage on my disk, and set limits for the...

View Article

Q. Am I doing qos and tc correctly? (x-post to r/networking)

submitted by toss_away_999 [link] [comment]

View Article

Find files by date in Linux

submitted by adminarticles [link] [1 comment]

View Article


multihomed iptables script generator

Does anyone know a good script generator for creating the initial set of rules for a multihomed server? submitted by efreak2004 [link] [4 comments]

View Article


How to break into Linux Administration

This may or may not be the right place, if not I apologize. I'd like to break into Linux Administration and i'm not quite sure where to start. Ruby on Rails and other technologies have always...

View Article

How to make a RHEL kiosk that can start a Virtual Box Guest VM?

This is what I want to do but I am not sure how to do it: Machine starts and shows a box with a few options (like a kiosk) They can select a guest VM to use with virtual box. Virtual box runs full...

View Article

systemd - pid not readable (yet?) after start - multiple services

I've been trying to correct the following on FC16 3.3.x-x.fc16.i686: /var/log/messages: systemd[1]: PID file /var/run/akmodsd.pid not readable (yet?) after start systemd[1]: Unit akmods.service entered...

View Article

[Question] Preserving file creation dates during migration to new server

In march I put a new server in the rack and replaced our 5 year old file server, yesterday I got a call from one of the managers asking about file creation dates, nothing on the server shows that it is...

View Article


Clustered KVM setup for Live Migration with gfs2 on CentOS 6

submitted by admica [link] [11 comments]

View Article

iptables command is adding -m for some reason. Help?

Hi all. Going nuts here. I issue the following command from the cli: iptables -t nat -A PREROUTING -p tcp --dport 25 -j DNAT --to x.x.x.x:pp This forwards all traffic heading to port 25 to my external...

View Article


Antivirus on LAMP servers

We have a "business requirement" for all our linux (ubuntu) servers to be running some form of on-access antivirus plus centralized updating and reporting. So, since we have an Enterprise Sophos...

View Article

Feed I set up with short UNIX tips

submitted by IOFailure [link] [6 comments]

View Article


RAID 5 configuration - looking for advice

My home file server has software (mdadm) RAID5. Recently I added a 5th drive to expand the array and immediately noticed a performance slowdown. It's still fast enough to e.g., stream videos, but the...

View Article

sshfs - mount a remote filesystem via SSH

submitted by adminarticles [link] [15 comments]

View Article

nginx error: *513 upstream timed out (110: Connection timed out) while...

My vps recently moved my server to a diff cluster and the localhost changed to 127.0.0.2 so I had to manually change the network interface to 127.0.0.1 but after reboot is goes back to 127.0.0.2 they...

View Article
Browsing all 17810 articles
Browse latest View live