Debian is a popular and influential GNU/Linux distribution. Questions here should generally be about Debian Server.

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1answer
103 views

Multiple DHCP uplinks - How to ignore DNS and default route on all but one?

A multi-homed box needs more than one uplink to be configured for DHCP. It needs to ignore default-route and DNS for all but one DHCP uplink. There is a similar question here [ Debian interfaces file ...
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0answers
144 views

OpenVPN Server client-connect scripts aren't executed

I have an OpenVPN server up and running that (Windows) clients can successfully connect to. Now I'd like to share a luks encrypted partition with those clients. The goal is, that the server fetches ...
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2answers
51 views

java installed but not working (dependency issue??)

I just installed Java 8 on my new VPS I set the links correctly but, still java, or javac won`t work: root@vpsXXXXX:~# update-alternatives --display java java - Auto-Modus Link verweist zur Zeit ...
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votes
1answer
88 views

Compiling an individual kernel module (Debian/Ubuntu)

I need to modify the ELF loader's kernel implementation of an Ubuntu 14.04 distribution. Having downloaded the sources using: sudo apt-get source linux-image-$(uname -r) I ran the configuration ...
1
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1answer
83 views

Server crashes with “huge task timeout”

First things first, I've read a lot about the "huge task timeout" kernel panic and know that this often happens if the server is out of resources. Error messages which appear only in the VNC console ...
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4answers
215 views

How to test if two given files are identical?

Just updated the code... I get out everytime on the "else" sequence. You can download the update.sh file from my server. it only contains echo "Hallo update" Updated code (03.11.2015) ...
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1answer
61 views

Convert existing servers to a failover cluster

We have ourselves quite a quandary right now. For some time, we've been planning on setting up a failover cluster for our existing servers. The plan so far has been to set up a 2-node GlusterFS ...
0
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0answers
26 views

megacli: Failed to alloc kernel SGL buffer for IOCTL

Today one of my servers started sending me alerts about non-optimal RAID state. These were triggered by a very simple script run by cron -- if it detects that not all of the disks report 'Optimal' ...
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0answers
65 views

kprop: Client not found in Kerberos database while getting initial ticket

I tried to set up two kdc with Kerberos 5: a master and a slave. I followed the instructions from the official docs: http://web.mit.edu/kerberos/krb5-latest/doc/admin/install_kdc.html But ...
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0answers
28 views

Stop Outbound SYN Scan

Hello I run a VPN company, and recently my host has been sending me these complaints that are likely coming from a user. I am not sure how to identify the user, if I could just do that I wouldn't ...
1
vote
1answer
259 views

RemoteApp / Seamless RDP Linux Server

I was wondering if there is an implementation of Seamless RDP for Linux servers, preferably Debian or similar, giving the result and experience of Microsoft's RemoteApp. Of course with Linux apps, I ...
0
votes
1answer
74 views

Preeseding a debian stable install with a complex partitioning scheme - missing physical volume

My personal systems run on: An open /boot partition separately random key encrypted /tmp and swap partitions and a password encrypted btrfs lvm volume holding everything else. My latest project is ...
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0answers
50 views

Wildfly Randomly gets killed

I'm with a weird problem that i tried everything and i couldn't solve it. I have a instance of Wildfly 8.2 running a JavaEE application that controls a CallCenter, this application use like 2 ~ 8 gb ...
2
votes
1answer
106 views

check header for Authenticated sender in postfix

My users send email with SMTP AUTH via SASL Authentification. Unfortunately their mails would marked as NoBounceOpenRelay by Amavis. So I set this to postfix main.cf smtpd_sasl_authenticated_header ...
0
votes
1answer
22 views

Need explanation for the Debian Mirror Checker status page

The Debian Mirror Checker provides status on Debian package mirror sites. The data is in a large table whose first couple of lines look like this: R Host T ftp-master time TS ...
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2answers
91 views

Issues with connecting to OPENVPN

I am trying to configure Mullvad on openVPN - Debian I have followed their online tutorial - Install OpenVPN and resolvconf (sudo apt-get install openvpn resolvconf) Extract the configuration files ...
0
votes
1answer
87 views

ldap_add: Constraint violation (19) additional info: some attributes not unique

Well I have already gone through ldap_add: Constraint violation (19) but couldn't solve my problem! Problem I'm facing is that, when I'm trying to add users from bckup.ldif file by issuing following ...
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votes
2answers
66 views

logrotate syntax error near unexpected token `20'

I cleared out my apache logs last week and now started to get these errors. Any ideas how I can fix this? /etc/cron.daily/logrotate: logrotate_script: -c: line 1: syntax error near unexpected token ...
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votes
2answers
62 views

How to use fsck? Never have used it but have to check the filesystem

My server crashed several times with rcu_sched self-detected stall on CPU errors. Now after restart it can not repair MySQL tables, some services start, some not. What command I have to issue to ...
-1
votes
1answer
36 views

Disable sendmail

I am setting up a Debian web server for testing and want to disable mails of any kind being send thorugh the server. I think I just have to uninstall sendmail, will that be enough? Will it affect ...
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2answers
36 views

Try to secure file system root with Apache2/Debian: all virtualhosts return 403 forbidden

I have Apache2 running on a Debian server. My virtualhost (one for now) are already configured in /etc/apache2/sites-available/default and are working fine: # /etc/apache2/sites-available/default ...
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0answers
305 views

rcu_sched self-detected stall on CPU on Debian server

My server is online since October 2014. Debian GNU/Linux 7.6 uname -r 3.10.23-xxxx-std-ipv6-64 It was working fine till last night. Last night it bacame unresponsible. I rebooted it from dadata ...
3
votes
4answers
35 views

Bash evaluation baffling

I'm trying to get a script to do something when one number is bigger than another, in this case, when the system load average exceeds a defined value. All of it is working aside from the evaluation ...
0
votes
1answer
159 views

Duplicity error: BackendException: ssh connection to SERVER_IP:22 failed: Unknown server SERVER_IP

I'm trying to setup a backup system with Duplicity. I have a server that I want to backup to another SFTP server. If I try to connect via sftp it works fine: root@SERVER:~# sftp user@SFTP_IP ...
0
votes
1answer
51 views

Error while installing slapd

I need some help for solving this problem when I try to install slapd package on Debian from testing repositories. Leyendo lista de paquetes... Hecho Creando árbol de dependencias Leyendo ...
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votes
1answer
57 views

How to enable Dovecot virtual users to change their password using passwd-file?

I am running Dovecot with several virtual users in passwd-file: http://wiki2.dovecot.org/AuthDatabase/PasswdFile . The file is /etc/dovecot/userdb . How can I enable the users to change their ...
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2answers
83 views

Restrict user changing xscreensaver settings

I would like to know any solutions people came up with restricting a user from changing a system wide configuration of xscreensaver. Part of my job is managing systems which have a requirement that ...
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0answers
34 views

fail2ban WARNING invalid command on apache2 disabled websites

I have a problem on a Debian Squeezy webserver running fail2ban. Now and then, fail2ban stops working complaining of missing access.log: fail2ban.comm : WARNING Invalid command: ['set', ...
2
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0answers
75 views

Debian does not shut down interface with ip link set … down

I have a really specific question for a trunk-testing environment. I have this network setup: +------------+ +------------+ | | +-----+ | | | eth0 ...
0
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1answer
29 views

Debugging inconsistent PHPUnit behaviour on different systems

This question has been originally asked in Stackoverflow but then I decided it might fit Serverfault better so I moved it here. I am trying to rearrange my Jenkins projects by moving some of them to ...
1
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0answers
82 views

start-stop-daemon not working as expected

I can't figure out why start-stop-daemon is not running the script below. What am I doing wrong? start-stop-daemon reports that it will start node when using the --test flag, but when I actually run ...
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0answers
17 views

Possible to have FQDN in Debian Logfiles?

Is it possible to have instead the hostname the fqdn inside debian log files? Example: Now its: Mar 2 18:00:12 www rsyslogd: [origin software="rsyslogd" swVersion="5.8.11" x-pid="2442" ...
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0answers
37 views

SSH connection closes when entering password for repository I try to clone using git

I have a private repository that I store on Bitbucket, that I would like to clone to my Debian server. While I am SSH connected to the server, normally I would run: git clone ...
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0answers
37 views

lp printing crossdomain on local printer

How can files located on web server (.png or .pdf) be printed on local printer ? I have a DYMO LabelWriter 450 attached to a local POS sytem, running LAMP / Debian wheezy. Currently product labels ...
-3
votes
1answer
70 views

Sendmail - How to relay / send emails ? (503 error: not authorized, use AUTH)

I have been following a how to for setting up sendmail using a smart host ssrs.reachmail.net, However I cant seem to successfully send a email from my server to my gmail account. I think I'm ...
0
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0answers
22 views

How to package nginx with custom modules for ubuntu server?

I need nginx with a few modules that are not included with the packages available via apt-get. I have no problem downloading the source from apt, changing the build params and compiling a .deb file ...
-1
votes
1answer
20 views

Run two mysql process on one data directory

I would like to launch two mysql process on one data directory (/var/lib/mysql) I have two servers, web-01 and web-02 but web-01 locked mysql data directory, and i would like to break this security. ...
0
votes
1answer
23 views

Debian: environment variable not available for script running from cron?

I have this line: echo $(date '+%Y %b %d %H:%m') Your output $HOSTNAME When I do it manually from command line I can see my $HOSTNAME just fine. However, when it's running from a script that's run ...
2
votes
1answer
111 views

How do I prevent Apache2 from trying to execute a file as a script?

So basically, I followed this guide about iptraf monitoring and rrdtool to the letter. I put it in /usr/lib/cgi-bin/ as usual for cgi scripts. Then, when I visit it from a browser, the images it makes ...
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0answers
46 views

netcat not listening on desired port

When I want to listen on desired port on one server, I use netcat ie: nc -l 8888 Then I can verify the server is actually listening on that port: netstat -tlnp | grep 8888 tcp 0 0 ...
0
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0answers
43 views

Run php as CGI with Apache 2.4 on Debian returns not found error

I am trying to run php build from source as CGI. I've added this to apache config ScriptAlias /cgi-bin/ /usr/share/php54/bin/ AddHandler handle .php Action handle /cgi-bin/php-cgi virtual ...
0
votes
2answers
99 views

postfix mails (works) to all but my domain on debian

I have set up a redmine server that I got from turnkey linux. Mail more-or-less works out of the box. I can mail to anyone that is not in my domain. Let me explain: If I run the mail command from ...
3
votes
2answers
73 views

Unable to boot into software RAID1 after disk failure

Today after restarting my data server I was unable to boot because one of the drives wasn't being recognized any more, it is still spinning when I connect it and not making many weird noises except ...
1
vote
1answer
1k views

Suddenly error='Cannot allocate memory' (errno=12) [closed]

So this morning I noticed my website is down, went on my server and saw that the webserver has been stopped. When I try to start it again I get this error start -Dhttp.port=80 ...
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votes
1answer
42 views

Impossible to add a script to cron [closed]

I am trying to add a script to cron jobs to be played daily. I tried multiple things but no one seems to work. First I tried to add a script in cron.daily: It s not triggered. #!/bin/sh cd ~/foo/ ...
2
votes
1answer
149 views

Limit the total memory usage of PHP-FPM

I'm running PHP-FPM on my Debian servers. My question is about the memory usage. I can only set the memory_limit inside PHP, and that shouldn't be too low for some requests. I also can only set the ...
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0answers
31 views

Why some apt-get and aptitude installations remove some programs?

I wanted to install wireshark, and I went to Installing wireshark So I just typed on terminal aptitude install wireshark and before it install wireshark, it removed 251 programs, and I don't have ...
1
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2answers
42 views

Find process with most TCP sockets?

How can I find the process with the most TCP sockets that is currently running with bash ? I would like to only output the process name
18
votes
3answers
265 views

Risk of starting NTP on database server?

I've heard rumors of bad things happening to database and mail servers if you change the system time while they are running. However, I'm having a hard time finding any concrete information on actual ...
0
votes
1answer
41 views

IPTables from public ip and port to lan ip

I own 3 public IPs for my server and I have multiple VMs that have their own 'job'. The server has 1 NIC. Public IPs: XX.XX.9.247 (MAIN) XX.XX.21.141 (additional) XX.XX.21.142 (additional) LAN ...