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21 votes
3 answers
2k views

What is the Rowhammer DRAM bug and how should I treat it?

DRAM chips are very tightly packed. Research has shown that neighboring bits can be flipped at random. What is the probability of the bug triggering at random in a server-grade DRAM chip with ECC (...
Deer Hunter's user avatar
  • 1,090
6 votes
3 answers
12k views

Broken BIOS detected, complain to your hardware vendor. WTF?

This is what I found in dmesg on my new Fedora 16 instalation on new HP ProLiant DL320 G6 [ 0.130963] Performance Events: PEBS fmt1+, Westmere events, Broken BIOS detected, complain to your ...
B14D3's user avatar
  • 5,278
4 votes
2 answers
2k views

free reports bogus amount of swap used

The swap used reported by free is very high. [root@rhel6 ~]# free -m total used free shared buffers cached Mem: 9892 9537 354 0 ...
Jonathan Lynch's user avatar
3 votes
2 answers
184 views

Where can I report an issue with ASP.NET Browsers File?

While working with an ASP.NET application on Chrome for Android I discovered that Request.Browser.Cookies returns False for that browser (despite the browser supporting cookies). Based on what I've ...
Nathan Taylor's user avatar
3 votes
1 answer
550 views

What was happening in this Let's Encrypt CAA bug? [closed]

Recently, Let's Encrypt shared this bug that occured in their systems leading to certificate issues to their clients. They describe the bug this way: The bug: when a certificate request contained N ...
Sara Chipps's user avatar
3 votes
1 answer
287 views

Bug in diff: wrong output for one-character files without newline [closed]

Consider this: echo -n a > /tmp/a echo -n b > /tmp/b diff -B /tmp/a /tmp/b Clearly, the two files are different, yet, diff seems to think that the files are identical. I've managed to ...
Navin's user avatar
  • 133
3 votes
1 answer
4k views

Blue Screen, unexpected shutdown on Windows Server 2012! (APC_INDEX_MISMATCH)

We have 2 new servers set up to allow remote desktop sessions throughout the warehouse. Intermittently we get complaints that the session has stopped working or has frozen. When we check the servers ...
jayburna688's user avatar
3 votes
0 answers
362 views

BUG message on xenserver 6.5 - bad memory?

Several times a day I receive the following error in /var/log/messages. The server hangs and requires a reboot to respond again: Feb 1 13:44:54 xenserver-abfuqvrs kernel: [35023.166776] BUG: unable ...
W Khan's user avatar
  • 58
2 votes
2 answers
2k views

MySQL allows entry without Password [duplicate]

I have configured my MySQL Database to require passwords on all users, even root from the machine itself. Now I discovered that there are empty Users in my Database Reproduce: mysql -u root -p and ...
v3nd3tta's user avatar
2 votes
2 answers
15k views

How to configure IPsec (strongswan) interface, so that only assigned interface gets virtual ip?

I have already used this configuration a bunch of times and I haven't had this problem before. Basically I establish the tunnel connection, but after connecting (with swanctl --initiate --child ...
Kostadin Krushkov's user avatar
2 votes
2 answers
2k views

libxml2 on CentOS 5.9

I'm having problems with a CentOS 5.9 web server running php sites. Apparently libxml2 2.6.26-2.1.21.el5_9.2 has a known bug, but there doesn't seem like they've put the newer release into the repo's, ...
user167772's user avatar
1 vote
1 answer
72 views

Apache, Accessing files as a directory, Bug?

I found a problem with my Apache webserver: Suppose I ONLY HAVE ONE file on my website (index.php): example.com/index.php When I access the URL using this way: example.com/index.php/abc or ...
Derrick C.'s user avatar
1 vote
1 answer
956 views

Networking / Multipath dropping

I'm having problem with few linux boxes running xen. They are acting as hypervisors and they are connected to SAN using multipath setup to provide storage to guest vms. Every now and then one of two ...
user124381's user avatar
1 vote
1 answer
688 views

Workaround for Tomcat 9.0.46 (bug 65308) - NPE in JNDIRealm

Anyone been hit by the NPE bug when using JNDIRealm/ActiveDirectory in Tomcat 9.0.46 and have a workaround? Context I had to upgrade from 9.0.43 due to a concurrency bug where the socket input stream ...
Daniel Sandberg's user avatar
1 vote
1 answer
360 views

Shellshock protection in Rackspace Ubuntu

I am trying to update my Ubuntu 13.10 servers in Rackspace to avoid Shellshock bug, but it is not working. Here is what I am doing: $ sudo apt-get update && sudo apt-get install --only-...
Daniel Cukier's user avatar
1 vote
0 answers
55 views

CTRL down on reconnect - Is this a bug in Remote Desktop?

I stumbled upon a weird problem when using RDP and it seems to be reproducible in my environment: Connect (in my case from Windows 7) to a remote Windows system (here Windows 2012) Open up a browser (...
Rob's user avatar
  • 214
1 vote
0 answers
102 views

Ubuntu 17.4 not reachable over lan after login

I'm hosting a website on nginx to upload/download zip files over LAN. I switched to Nginx and Ubuntu 17.4 and there worked too but just for a minute, then the server become not reachable for any PC ...
user420750's user avatar
0 votes
2 answers
141 views

Centos - How to avoid bugged yum updates

I'm running a Centos server, and i've had issue with bugged yum updates. Currently i have a cron job, which does a yum update every 3 months, but sometimes i get an update with a bug in it, that ...
Jojo595's user avatar
  • 15
0 votes
1 answer
91 views

Dovecot + Sieve - match is false when it is clearly true

Dovecot version 2.3.16 (7e2e900c1a) Ok I have a problem with this: if address :is :domain "From" "test.net" { fileinto "INBOX/Test"; stop; } And the thing is that this is ...
Ajay's user avatar
  • 61
0 votes
1 answer
789 views

Bug in Mailman version 2.1.18-1

In their zeal to counter spam, both AOL.com and Yahoo.com - and possibly some other big players - changed their email reception policies which effectively cut off their customer's ability to receive ...
Richard T's user avatar
  • 1,298
0 votes
2 answers
5k views

Apache returns default page instead my content

My web site works perfect, but sometimes apache returns default html page: It works! This is the default web page for this server. The web server software is running but no content has been added, ...
user451555's user avatar
0 votes
2 answers
3k views

Sometimes Tomcat doesn't re-deploy on startup

The infamous rm -rf command is something we would rather avoid in Production, even if it's scripted. So if you have a war file named mywebapp.war and a directory its deployed to under webapps/ that is ...
user447607's user avatar
0 votes
0 answers
55 views

Very strange behavior of OpenVPN between two sites

We've got a OpenVPN configured with layer2. It is connected to a BGP router which announces a /24 IPv4 and a /29 IPv6. The purpose of the VPN is to redistribute IPv4 and IPv6. However, recently I have ...
Kibioctet's user avatar
0 votes
2 answers
5k views

How can I avoid the error TCP_MISS_ABORTED/000 when uploading files through squid?

While uploading big files, > 10MB, through a squid V5.6, I noticed that they failed and/or were retried. The error has been logged multiple times in the logs: 1671092710.452 423 ::1 ...
Zioalex's user avatar
  • 137
0 votes
0 answers
3k views

I cannot start an AWS task: CannotPullContainerError

My own image public.ecr.aws/f6q1r4v8/amazonlinuxwithshell:latest fails to start on AWS (FARGATE) in a very weird way: Last status Stopped Stopped reason CannotPullContainerError: inspect image has ...
porton's user avatar
  • 312
0 votes
1 answer
116 views

cat an file programs fail to acess a file but vi works properly (Debian)

I have getting some problems with my system after a bad reset via ctrl+alt+del. Since then errors related to ACPI and ata6 are reported. Trying to get a solution to this (in a savage way:I am n00b), I ...
Daniel Bandeira's user avatar
0 votes
0 answers
2k views

Ubuntu 18.04 LTS detects there is an MDS CPU bug present and SMT on, data leak possible. what do I do about it?

On examining my system log I found the following entry: Oct 23 10:38:00 kernel: [0.xxxx] MDS CPU bug present and SMT on, data leak possible. See https://www.kernel.org/doc/html/latest/admin-guide/...
Guest's user avatar
  • 1
0 votes
1 answer
294 views

cron recently ignores changes to /etc/crontab

Cron recently started to ignore any changes to /etc/crontab. Cron's mail works for the older entries. Restarting cron with sudo systemctl restart cron has no effect. I did not install new packages ...
Ilka's user avatar
  • 1
0 votes
0 answers
56 views

Unable to load PHP files from second server directory

My server has a root directory which is /home/forge/example.com/current/ionic/www and a secondary API PHP directory, located /home/forge/example.com/current/public. When the user browses to example....
Ian Arman's user avatar
  • 133
0 votes
0 answers
79 views

Website gets stop responding on a particular time

I have a site running on shared hosting with the following configurations Apache Version : 2.2.34 PHP Version :5.6.31 MySQL Version : 5.6.33-79.0 Architecture : ...
Abhishek Tripathi's user avatar
-1 votes
1 answer
2k views

Amazon linux package conflict [closed]

I was trying install php55-fpm on amazon linux, but there is a package conflict with php-common. How solve this issue ? [ec2-user@ip-10-0-12-54 ~]$ sudo yum install php55-fpm Loaded plugins: ...
nosferatu's user avatar
-2 votes
1 answer
2k views

Server Crashes randomly [closed]

I have a problem, VM server 2008 R2 SP1 , running citrix is randomly crhasing, in event log I found following: The computer has rebooted from a bugcheck. The bugcheck was: 0x0000003b (...
user176320's user avatar