Questions tagged [debian]

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

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24 views

Changing the hostname of a debian server using a subdomain

I own a domain name mydomain.example, which I use CloudFlare for DNS. The domain is configured to point to my website hosted on GitHub. In parallel, I have a Debian VPS from OVH, and I would like ...
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10 views

Setting up new server. Strange entries in /var/log/mail.info

I'm setting up a new webserver and noticed these lines in my mail.info appearing every 5 minutes. Anyone know what is causing this? Mar 30 17:45:02 enterprise dovecot: imap-login: Disconnected (...
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PosixACL and NFS

Background first, as always. I administer two HPC systems. Both are running the same OS, in the case CentOS 7. They both mount an NFS share that is provided by a server, which has a number of other ...
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47 views

Why did I block port 25 incoming on my webserver?

I'm currently in the process of setting up a new (Debian) webserver to replace a very old (Debian) webserver which I also setup years and years ago. I'm trying to "clone" the old webserver as much as ...
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8 views

Track multiple directories with etckeeper

I'm trying to provide a solution to use etckeeper as a keeper of multiple locations (directories). I'm using Debian 8. With the default config etckeeper "watches" the /etc directory but I want to have ...
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Trying to identify bandwidth usage/spike on Linux Debian VM

I am trying to identify an issue with a Linux (Debian) VM running under Hyper-V on Windows Server 2016. The issue is that, at random intervals I'm seeing massive spikes of bandwidth which is maxing ...
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15 views

Complete server cash caused by php cli script - possible?

I have a problem that I cannot wrap my head around. One of our machines (physical dedicated server, Debian 10, nginx, mysql, PHP 7.3) is running a php application that also uses the php-cli regularly ...
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Debian 10.3 usermod command not found [closed]

I'm logged as a root and trying to run usermod program. and getting command not found error. The package util-linux is already installed. I just migrated from Debian 8.2 to 10.3
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10 views

How do I configure davfs2 with setuid when installing with ansible?

I use the apt module of ansible to install davfs2 on a debian system. When installing the package in interactive mode, I get a dialog where I can choose to install mount.davfs with setuid, such ...
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MDADM Raid10 event mismatch after restart

I made a raid10 with 8x8TB drives the file system on it is XFS. I never had any issue with it. The raid is configured as near2 and internal bitmap. The drives are connected to a LSI-9211-8i in HBA ...
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Php-fpm configuation fo multi-site and Apache2 error log

I have php-fpm 7.3 on a Debian 10 and apache 2.4.38. I create 2 conf /etc/php/7.3/fpm/pool.d/mysite1.conf /etc/php/7.3/fpm/pool.d/mysite2.conf In each i modify this ; pool name ('mysite1' here) [...
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Is 6% CPU & >180 MB RAM usage normal for exim4 on Debian 10?

I just (attempted to) set up exim4 on Debian 10. Is the above normal for exim4 running under root when I run sudo systemctl restart exim4.service? Seems a bit high for an MTA. I have root: ...
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Docker: Trying to install PHP libraries

I am running Apache / PHP using Docker. Linux distro is Debian. I am trying to install php7.3-gd. I run command: apt-get install php7.3-gd But I get: E: Package 'php7.3-gd' has no installation ...
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Getting network UNCLAIMED in Debian 8.3

When i check for lshw , i get following result user@user# lshw -c network *-network description: Ethernet interface product: I210 Gigabit Network Connection vendor: Intel ...
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ifconfig not showing wlan0

Not able to see wlan0 on executing the command ifconfig: The output on executing the command ifconfig is eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 10.0.2.15 ...
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1answer
85 views

How to make any mail addressed to my domains go to a hotmail or gmail account via my VPS? [closed]

I have recently setup my first VPS (Debian 9). Goal: I would like all the mail addressed to my domains to be "re-directed" to my gmail or hotmail accounts and I go fetch it there with my mail ...
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9 views

Communication issue between linux containers

I've a network related issue. On ProxMox VE 6.1-8 I have several LXC containers, all based on debian 10.3. All containers are connected via two bridges: vmbr0 connected to the physical ethernet port ...
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34 views

Dante server not starting on Raspberry

I am trying to setup Dante SOCKS server on my Raspberry 3. I tried a clean install of Debian Buster and Ubuntu 19.10. On both systems I get the following error right after server installation with the ...
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ipsec strongswan UP but no routes

I have a server (Debian 10) behind a NAT router. In this server are running multiple VMs. I want to establish an IPSec connection to a server on the Internet. Here are my ipsec.conf files on both ...
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2answers
21 views

How can I forward / redirect http to a public IP with nginx?

I have a domain example.com with DNS A record pointing to a public ip x.x.x.x. I need to get all http and https requets from that server and forward that traffic to another public ip y.y.y.y. Any ...
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Debian 10 bonding + bridge noIPv4 for kvm guests

I've a big problem with my fresh Debian 10 Installation on my root server at home. I use 2 of the NICs connected to my switch as "bond0" and now I want to add a bridge "br0" for my kvm guests. I don't ...
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43 views

OpenVPN Share internal resources

I am configuring an OpenVPN server and I have a server connected to it, of which I want to share its subnet. The thing is, when a user connects to the VPN and wants to curl the S3 ip: Packets arrive ...
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19 views

Exim delivers mail successfully but keeps it queued for no apparent reason. Recipients receive mail multiple times

I recently upgraded my exim4 mailserver from Debian 9 to Debian 10. Since then I have the issue that random emails get queued although no apparent error occurs and the emails successfully deliver. But ...
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171 views

Permission denied (publickey) - Troubleshooting sshd pulling public keys from LDAP Server

1. Problem Summary: Hi, recently, in our infrastructure production environment, new users are unable to ssh into a debian jump server. The jumpserver' SSH daemon retrieves the SSH public keys from ...
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54 views

Global Bash Completion Scripts

I have a Bash completion script. Is there a place I can put it on my system, so that it will be automatically source-ed for any user that uses a Bash shell? I would prefer a solution that does not ...
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1answer
38 views

ufw replacement (or workaround) for Debian 10

We have servers where the admins are used to using ufw on Debian 9. Upgrading to Debian 10 means switching from iptables to nftables (yes, we could still use iptables-legacy but do not want to unless ...
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17 views

How to redirect a packets from port 80 VM1 to port 8080 VM2?

I want to redirect all packets incoming to 192.168.1.2 port 80 to 192.168.1.1 port 8080, but what I am doing wrong here? On VM2 iptables -A PREROUTING -s 192.168.1.2 --dport 80 -j REDIRECT -d 192.168....
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1answer
24 views

Network not working after moving the virtual server

I moved my server from one virtual server instance to another instance, exporting the image and importing it to the new server. Everything is working fine, except the network. The new server tries to ...
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16 views

Apache-Balanced PHP applicaion unable to handle logins

I'm trying to load-balance Chamilo (https://chamilo.org/it/) on 2 servers via Apache. When the load balancing is active, through some refresh, I'm logged out. Through some other refresh, I'm logged in ...
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58 views

HTTP 403 – Forbidden - Tomcat - Debian9 - Flowable

I'm facing an issue that's breaking my head, I already had a proof of concept of this setup and now it's not working OLE! So, I have a small script that kindof setups the server that looks like this. ...
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51 views

How to move nginx cache contents to another machine

I'm running a nginx server on debian 9 to save some bandwidth for my s3 bucket. It currently holds 300gb of data. In order to save some money I want to move this data to another server. I'm currently ...
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1answer
33 views

Debian buster r-base won't upgrade to 3.6.3

I have 2 computers (a PC and a server) with debian buster as OS. I need to backport the R language version from 3.5.2 to 3.6.3 on both. I follow this guide : https://cran.rstudio.com/bin/linux/debian/....
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how to use the port 587 on postfix to send email? [duplicate]

My postfix sever work on debian, is sending on port 25 but listen on the port 587 i need my server to send on port 587 without use the relayhost option on main.cf please help me !
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Trying to use sudo to download things through SSH. It returns with this message: sudo: effective uid is not 0, is sudo installed setuid root? [closed]

so recently I have been trying to create a new website and while doing so I needed to download some things through SSH. However whenever I try to use the command "sudo" it gives me the following ...
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97 views

Where to get debian mirror status?

The following command fails right now (14:16 in EET timezone): docker run debian:buster apt-get update The error being: $ docker run debian:buster apt-get update Get:2 http://deb.debian.org/debian ...
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70 views

Postfix 3.4.9 SSL issues — no shared cipher from servers using TLSv1

Edit 1: I've narrowed it down to TLSv1 that both servers listed below (no others have failed yet) are attempting to use. I'll be contacting their webmasters requesting they stop using an insecure ...
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1answer
79 views

NTP time sync failures on Debian

This is on HypriotOS (Debian GNU/Linux 10) running on RaPi. $ timedatectl show-timesync Failed to parse bus message: Connection timed out Then do this with sudo: $ sudo timedatectl timesync-status ...
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11 views

How can I configure a txqueuelen value to persist plug/unplug of USB network device?

How to configure debian to set txqueuelen of USB network device (LTE modem) after plugin? The network device is created after plugin. Debian-Testing (Bullseye)
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1answer
38 views

OpenVPN and DNS recursion

I've set up an internal DNS with Bind9 on a Debian9 device so that my colleagues can call our public cloud infrastructure hostnames to connect to the servers on their private interfaces. I've set up ...
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1answer
45 views

Proxmox IPv4 inward routing not working

Yesterday I realized that one of my LXC containers on a Proxmox server needed to access github.com, therefore I had to add IPv4 support (really Github?). I added a /29 subnet to the internal network ...
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48 views

openssh weird public key authentication fail

I'm quite dumbfounded on this problem, so any advice is appreciated. As a background : My jenkins agent (debian 10) has a job which retrieves a ssh key and writes it to the local workspace. I want to ...
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1answer
82 views

OpenVPN Default DNS on Windows Clients

I have set up an OpenVPN Server on a Debian9 device so that my company can reach our server infrastructure from the outside. I'd like them to use hostnames to reach the servers so I've set up Bind9 as ...
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12 views

Saving images uploaded to a form on the server using python cgi

I want to be able to save an image from a html form to the servers disk using python CGI script. The server is already configured to run python CGI scripts, and Im only getting the "500 Internal ...
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1answer
46 views

Ping a host in other network

I have a Virtual Machine One in inner network 192.168.1.0 with ip address 192.168.1.1 and Machine Two in inner network 192.168.2.0 with ip 192.168.2.2. Both have enp0s3 interface. How could I ping 192....
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200 views

libc6 dependency mismatch in Debian 9.12 stretch

I have the following libc6 dependency problem in Debian 9.12 stretch. sudo apt install libc6-dev Reading package lists... Done Building dependency tree Reading state information... Done Some ...
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1answer
51 views

Rsync files to a server while changing their ownership without root access

I'm trying to allow users to rsync directories to a remote server, while changing the user and group of the uploaded files/directories to nobody:nogroup. Each user has SSH access to the server via ...
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32 views

Amavis and altermime disclaimers by cat

I want to archive disclaimer signing by ccat, to append disclaimers to sent mails by filtered by ccat. i tried with the wollowing setup: $defang_maps_by_ccat{+CC_CATCHALL} = [ 'disclaimer' ]; ...
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1answer
35 views

Munin-node plugins on Debian 10 cannot read from home directories. Debian 9 works fine

I am on a completely default Debian Buster installation. I have installed munin-node, which reports itself as version 2.0.49. I have a custom plugin in /etc/munin/plugins. It is a shell script that ...
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17 views

Debian Buster: docker login throws certificate signature exception

I have installed docker on top of my HyperV debian VM following this guide: https://docs.docker.com/install/linux/docker-ce/debian/ When trying to login to dockerhub, i get the following exception: ...
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20 views

Debian 10 server crashes/no more ping perf: interrupt took too long

Our Debian Server (v10) is hanging (no more ping answering) once a day, at different time. We use IPMI to connect remotely to the server, and we can see sometime just the login, sometime with the ...

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