Questions tagged [debian]

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

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No history and path/bash completion on some systems

For some reason, I don't have a history of commands in the terminal and neither can I complete paths or commands. Pressing arrows also show symbols like ^[[D and ^[[C. The shell is bash and .bashrc ...
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u-boot refuses all boot options after upgrade

Summary: I recently updated u-boot on my sheevaplug to the latest u-boot supplied in the debian repositories, and all boot options stopped working. => version U-Boot 2019.01+dfsg-7 (May 14 2019 -...
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PAM “New Mail” Notification Not Appearing Through SSH [closed]

For unknown reasons, pam_mail.so is not printing new message notifications or properly setting the MAIL environment variable when I login over SSH. I believe I've got PAM configured properly, but I'm ...
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what IP should be used in hosts when setting up the mail server?

I'm setting up a mail server on my debian by following the tecmint tutorial. In step 4 the ip should be added in the hosts file. # hostnamectl set-hostname mail.mydomain.com # echo "192.168.0.102 ...
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Cannot login to SQL Server instance installed on Debian using domain account

I can login to SQL Server 2019 (installed on Debian Buster) with SA account using SQL Management Studio on Windows Server 2016, but I cannot do this with the domain account using integrated ...
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Can I create a 1:1 NAT with iptables?

I am running a Debian 10 server which has multiple network interfaces. Can I create rules that will route all network traffic coming in to one IP address on one of the interfaces from the outside (i.e....
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38 views

Unable to ssh with public / private key pair

I'm unable to connect (ssh) to one of my servers with pubkey. It was working last week, and I have no idea where to search right now. I have a script which should fetch files with scp to use them ...
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2answers
60 views

OpenVPN - ERROR: Cannot open TUN/TAP dev /dev/net/tun: No such file or directory (errno=2)

There are lots of questions pertaining this error, and there is a suggested manual fix which works well, but there's no permanent solution. How can i permanently solve this? Im having this issue on a ...
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How to install mod_mono on Debian 10

I want to run ASP.NET MVC application in Debian 10 with Apache. I have installed latest mono from standard mono repository. Trying to install mod_modo using apt install libapache2-mod-mono throws ...
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1answer
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Why do I get Configured passdbs don't support credentials lookups from dovecot

I am trying to add authentication to Postfix on my Debian 4.9.65-3+deb9u1 server. The first stage of this is to get authentication working with dovecot, apparently. If I run the command: # doveadm -...
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base-files installation error: new info file /var/lib/dpkg/tmp.ci/conffiles

I recently wanted to update my server with apt update and apt full-upgrade. The following error occured: dpkg: Error while processing the archive /var/cache/apt/archives/base-files_9.9+deb9u12_amd64....
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Apparent inconsistency in Apache SSLProtocol

I'm running a server with Debian 10 and Apache Version: 2.4.38-3+deb10u3. The behaviour of different settings for SSLProtocol is puzzling. SSL has been configured to be quite secure. This setting ...
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Is Debian the only distribution using 127.0.1.1 instead of 127.0.0.1?

My question is related to this question: In some bash script I found this snippet here: ... if [ -e /etc/debian_version ] then ipv4_localhost_re="127\.0\.1\.1" else ipv4_localhost_re="127\.0\.0\.1" ...
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Debian 9 stops being accessible on eth0 after creating openvpn session

When I connect to my vpn server from the debian9 client it stops being accessible on its eth0: # openvpn --config mytest.ovpn Sun Feb 9 15:22:24 2020 WARNING: this configuration may cache passwords ...
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How do I limit ping (ICMP) responses on a debian 10 server?

I have a VPS with debian 10 installed, primarily used for website hosting. when I issue a ping to the server from a remote machine, I am able to and receive responses for packet sizes up to around ...
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1answer
59 views

Libvirt has no KVM capabilities even though qemu-kvm works

I've learned that CirrusCI offers nested virtualization in their free package for public repos and I am trying to make use of it for testing my Ansible playbooks. Unfortunately, libvirt is insisting ...
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1answer
34 views

Strongswan IPSEC Tunnel block traffic one way

I've set up a working Site to Site IPSEC Tunnel with strongswan on a debian 9 machine. However I have a requirement about how the traffic should work : The network on Site A can send packets to Site B ...
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42 views

High Traffic Server Configuration - Are We Doing It Wrong?

We have a REST API server with 25 million calls each day. Our stack consists of Haproxy + Gunicorn + Flask also we have a MongoDB database that's used by our Rest API. We monitor it with Netdata and ...
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1answer
60 views

How to disable port 80 and enable port 443 for https in apache2 on Debian?

I installed apache2 on my Debian server, and I want to completely disable HTTP over port 80 and only have https over port 443. This is my current ports.conf file ports.conf This is my 000-...
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30 views

Bacula director 7 and file daemon 9 compatibility

We have a debian stretch backup server running bacula 7.4.4 (fd, sd and director all same version). I tried to connect some new servers running debian buster with bacula fd 9.4.2 with no success. When ...
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Why does Docker use the same user and cgroup namespaces by default, when starting a new container?

Why does Docker use the same user and cgroup namespaces by default, when starting a new container? I don't understand why Docker doesn't set up a new user namespace, so that root in the container isn'...
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1answer
77 views

SQLite WAL concurrent write performance on UNIX systems

I have two setups: one runs on windows 10 (ntfs partition), the other on debian (ext4 partition). The R source code is the same. The main process starts 8 child-processes (P-SOCKS) -- on 8 vcores -- ...
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How to transfer postgres databases from Debian 6 Postgres 9.1 to Debian 10 Postgres 12

VPS server has old Debian 6 Squeeze with Postgres 9.1 It has 24 databases. Every night backup copies are created using pg_dump to /root/backups directory for every database. This directory has 24 ....
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Apache Reverse Proxy with SSL + Moodle 3.7 results Error 503

I would like to setup an Apache reverse proxy with SSL on both frontend & backend. Using wildcard SSL certificate. Front-end server versions: - Debian GNU/Linux 9.7 (stretch) - Apache v2.4.25 ...
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1answer
104 views

Double hop VPN - Can only see LAN traffic, no internet

TLDR: Double-hop VPN on raspberry pi. Can ssh to and see samba shares of local devices over VPN. Can't get internet traffic over VPN. Not sure how to proceed. My setup is a single Raspberry pi ...
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1answer
43 views

Unable to mount cifs share in fstab with spaces in share name

I'm running a Debian Squeeze system and trying to mount a windows share in /etc/fstab. I've got an existing cifs mount working, but it's a simple //xx.xx.xx.xx/sharename situation. This second one isn'...
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Debian pin packages based on repo url

I have a problem, where my pin file is seemingly being ignored by apt. The situation is as follows: I have PHP installed from dotdeb.org and would like to reinstall it from sury.org. It is made out ...
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1answer
97 views

Very slow SMB speeds on macOS

Since I recently got a new Mac Pro (running Catalina 10.15.2), I connected it using 10 GBit Ethernet to my Debian 10 / Proxmox server. When connecting to a share however, I am only getting 150-300 MB/...
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Python CGI script not displaying on the website at all. Apache 2 Debian 10

me and my friend have started up a server on Debian 10 and its running Apache2. I have written a very simple website and a python script just to test the cgi scripts. So basicly after a user completes ...
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1answer
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Desktop not starting after Debian 10 upgrade

Just upgraded a server box from an up-to-date Debian 9 to: # uname -a # Linux server 4.19.0-6-amd64 #1 SMP Debian 4.19.67-2+deb10u2 (2019-11-11) x86_64 GNU/Linux Now the graphics terminal only shows ...
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41 views

SonarQube 7.1 - Debian installation- connection refused

I'm having trouble with first run of a SonarQube 7.1. I still have an error in logs as below: ./sonar.sh console org.elasticsearch.transport.ConnectTransportException: [][127.0.0.1:9001] ...
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Resource consuming process

I have a Debian server hosting an AngularJS - Java application. When I run the htop command I have the following process which consumes the resource and I wanted to know what this process is for? ...
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cgroup rt support in Debian Buster (Kernel 4.19.0)

Is it possible to enable the cgroup rt support in Debian Buster (kernel 4.19.0) without recompiling the kernel? Perhaps with a grub configuration parameter? Thanks. Background: Docker logs this ...
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Finding a system vulnerable to dirtycow

I'm not sure where to turn, so I turned to this forum. Please don't downvote me for nothing, I'm just trying to ask a question. Hello! So, I've been trying to find a system vulnerable to dirtycow and ...
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Can I use environement variable as domain name in Nginx? [duplicate]

OS: Debian 10.2 Hi, I wonder if it's possible to use environment variable as domain name in Nginx. I've tried to set one using export VARNAME but it didn't worked for me.
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1answer
262 views

Docker install on clean Debian 10.2 causes error with aufs-dkms package

After installing Docker 19.03 on a clean updated Debian 4.19.67 I am experiencing some problems with the aufs-dkms package that is a dependency. I even reinstalled the Debian server and tried all ...
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25 views

How to troubleshoot internet down every day?

Every day the server is unreachable and I need to unplug and replug it in. I cannot ping it and all web services are down. After a reboot the internet is back on again. There are no cronjobs fail2ban ...
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1answer
85 views

Docker Swarm and Netfilter

I have deployed a Docker Swarm server on my VPS, to handle an Asp.Net Core application. I want to serve this app through a Nginx web server. Let's suppose my web app is a vanilla app I created ...
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1answer
39 views

su: authentication failure (password correct, setup worked before, nothing changed)

Most of the issues I found are related to new installs, root password being disabled by default, or things falling apart after some changes. None of that applies here: in my case nothing was changed, ...
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1answer
62 views

ZFS 3-drive setup on Debian

I have a machine with 3 2TB SSD drives, I want to configure openzfs at least on two of them. The root partition has ext4 and if possible I would like to avoid reinstalling everything, so I am ...
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2answers
45 views

Is there a way to alias a specific interface ip?

I've got a VCS running on debian as prod server, and due to some hypervisor issues it had to be rebooted/migrated/updated several times in the past week. Because i'm running my app using docker ...
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2answers
63 views

fail2ban action to route to another ip

I want to create a fail2ban action which routes the traffic to another IP on ban action, and removes the route on unban action. File: iptables-route.conf in /etc/fail2ban/action.d/ # Fail2Ban ...
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1answer
37 views

Google cloud static IP in debian

I have google cloud instance with static IP assigned to it. However my /etc/network/interfaces contains only eth0 interface with auto dhcp ip assign. I need to run some services that I need to bind ...
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1answer
77 views

How to programatically change the DNS servers in Linux

I have this app that is supposed to change the DNS servers of a Linux machine programatically but I can't seem to find a proper way to do it. Some versions are good with updating resolv.conf, others ...
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1answer
30 views

hot added vCPU for linux not used fully in top command

just recently we started to see high CPU pressure on one of our machines. All our machines are running Linux Debian and we use vmware under the hood. We have hot added new CPUs and they're online in ...
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1answer
58 views

How to rewrite two URL's to the same endpoint via nginx?

I have two HTTP endpoint as follow http://me11.example.local/api/foo http://me11.example.local/api/boo I want to redirect them to two different endpoints. In my config file it works for only one ...
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1answer
42 views

Is it possible to have nullmailer resolve recipient's MX servers like sendmail does?

I installed nullmailer on a Debian 10 VPS. root@:~# cat /etc/nullmailer/remotes hotmail-com.olc.protection.outlook.com echo "Subject: test" | sendmail -v me@hotmail.com works, I receive the e-mail. ...
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Enable fail2ban to send out emails without installing too much extra software (like postfix) [duplicate]

I need fail2ban to send out email notifications to myself. It runs on a Debian 10 minimal install All of the tutorials I found simply install the full email packages like Postfix or Sendmail, and ...
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1answer
86 views

Error: Couldn't drop privileges: User is missing UID (see mail_uid setting)

I have an email system that is setup loosely around the ISPMail guides here - https://workaround.org/ispmail/buster/ I am trying to setup a script for automatic password scheme migration, but I'm ...
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3answers
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Stable headless LEMP server Debian vs Ubuntu

I used Debian for my servers for several years now. I'm looking for stability only doing security updates. In the past I had some issues with Ubuntu after an update. Debian has always been rock solid ...

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