Questions tagged [debian]
Debian is a popular and influential GNU/Linux distribution. Questions here should generally be about Debian Server.
7,667
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install the same debian packages on another system
How do I export a list of installed Debian packages on a system, and then install those same packages on a new system?
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3
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Uninstall Docker when installed via curl
I have installed docker un my debian 7 server using the following command :
sudo curl -sSL https://get.docker.com/ | sh
I would now like to remove docker, how on earth do I uninstall it ?
- 343
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Ulimit file descriptor limits not being applied for particular process
I recently checked one of our redis processes to what ulimits where applied using:
cat /proc/<redis-pid>/limits
And was suprised to learn that is was at the low default value:
Limit ...
- 1,638
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Standard or best way to keep alive process started by init.d
I'm looking for a standard way or best practice to keep a daemon started by an init.d shell script alive.
Or even better, is there a way to keep it alive directly from /etc/init.d?
Specifically, I ...
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All Debian boot messages
How can the messages that scroll by when booting a Debian system be reviewed later?
In other words, how can I review absolutely all of them conveniently? That's the important point to the question; ...
- 341
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Why are outdated packages installed by yum on CentOS? (specifically PHP 5.1) How to fix?
I'm working on a fresh CentOS server and am extremely annoyed to find out that yum does not work as smoothly and brilliantly as "apt-get install" does on Ubuntu.
Installing a LAMP stack, I ran the ...
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How do I make a wildcard package search using apt-get?
With yum it was simple: yum list *xxx* but this does not work with apt-get.
How can I do a search like this?
Also, how do I see what package provides a specific command?
- 8,236
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Debian: How do I check the last time package upgrades/updates were run?
I want to know when we last ran the package upgrades/updates on our Debian server.
user18233
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2
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No IPv6 connectivity from docker container
i'm having serious problems enabling IPv6 in docker.
Environment
The host is running Debian Jessie.
It's a virtual Server (KVM).
eth0 has a statically configured address like w:x:y:z::1 in a ...
- 771
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7
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Restore SSH session
I have connected to my server via SSH and created a process, but suddenly my internet connection got disconnected. I know that the process is going on, but how can restore previous session to see the ...
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Give root password for maintenance
After entering
shutdown now
in terminal I get everything running normally and then:
All processes ended withing 2 seconds...done
INIT: Going single user
INIT: Sending processes the TERM signal
INIT:...
- 502
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WGET can't resolve host
I've got 2 machines on the same sub-net running Debian 5.0. They use the same DNS (/etc/resolv.conf), they route to the same gateway (#route) and they have the same iptables settings (#iptables -L). ...
Maggi Trymbill
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2
answers
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sudo not working on certain commands
I have a rather weird problem with sudo on Debian 8. Users cannot execute some of commands in /etc/sudoers.d. I use Chef to distribute configurations, so all files are automatically generated.
...
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Bad ssh config on remote server. Cannot login in
I accidently changed ssh_config instead of sshd_config on a remote debian machine. Whenever i try to loging, i get
/etc/ssh/ssh_config: line 55: Bad configuration option: permitrootlogin
/...
- 271
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answer
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how to set up monit to monitor disk-space
I use monit on my server to monitor apache and mysql running.
Now I want to add an alert if the disk gets too full. I added this for testing in /etc/monit/monitrc:
check device rootfs with path /dev/...
- 2,519
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How to get IPv6 running properly?
So, my problem is that I just can't get IPv6 to work. Ping6 just tells me connect: Network is unreachable when I try to ping ipv6.google.com for example.
ifconfig looks like (a tad censored):
eth0 ...
- 660
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disabling predictable network interface names in xubuntu 15.10
How do we disable predictable network interface names in xubuntu 15.10 ? I want my old interfaces naming like eth0 ... ethx, some of my software assumes eth0 interface to be present and is hard ...
- 253
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api-get "Error reading from server" under Docker
I'm running the following command in Bash:
DEBIAN_FRONTEND=noninteractive apt-get update -qq \
&& apt-get install -y build-essential git libncurses5-dev openssl \
libssl-dev fop ...
15
votes
3
answers
17k
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Debian 'ignores' /etc/network/if-pre-up.d/iptables
I want my iptables rules to automatically be loaded on startup. According to the wiki on Debian this can be done by placing a script with the name iptables in /etc/network/if-pre-up.d/ So I did, this ...
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Postfix/postfix-script warning symlink leaves directory: /etc/postfix/./makedefs.out
I trying to get an email server up and running on a raspberry pi running Raspbian Buster.
In my postfix checks I am getting a strange notification about a symlink that I definitely did not create ...
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Where can I find the Dropbox log files?
I am running Dropbox on a Debian server. Once I start Dropbox using
python dropbox.py start
it stops working after a while and
python dropbox.py status
reports:
Dropbox isn't running!
I ...
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How to add a script to startup and shutdown in debian?
the title pretty much sums it up.
how do I add a startup.sh and shutdown.sh of my server app to the startup and shutdown sequence of the Debian OS?
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How do I check the origin and archive of a package?
I'm trying to figure out why a package was not upgraded unattended, and I have turned my eyes to the Allowed-Origins configuration. However, I do not know how to check the origin and archive of ...
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After upgrade from Debian 10 Buster to Debian 11 Bullseye security updates 404 not found
Doing recommended upgrade path, TL;DR:
Backup data, then
apt update
apt upgrade
apt dist-upgrade
reboot
Also disable all non main stream packages if any.
Then preparing APT for new distribution:
sudo ...
- 719
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21k
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Debian jessie nginx with openssl 1.0.2 to use ALPN rather than NPN
I am running debian jessie on my server and recently upgraded to new nginx web server with http/2 support (nginx 1.10). As today, it works great and webserver is delivering content with http2 protocol....
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Using a self-signed SSL cert for an HTTPS-based internal APT repository
I've set up a Debian repository (Ubuntu actually) for internal use with some private packages, and now want to make it available over the web to some specific servers. I would like apt-get / aptitude ...
- 336
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4
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How to use update-alternatives per user
Is there any way to use update-alternative "user wide" ? I mean that it would be great to set preferences per user.
Does Debian provide some tools for that?
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libpam-ldap or libpam-ldapd?
I'm setting up LDAP authentication on my personal VPS, and Ubuntu has two packages for the same purpose: libpam-ldap and libpam-ldapd. Which should I use?
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How to reset sysctl to its OS defaults?
I couldn't find an answer in the man pages for sysctl. My sysctl.conf file is still at its default state. I'm testing several values and loaded new settings via sysctl -p newsettings.conf. I thought ...
- 3,828
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How do I ask apt-get to skip all post-install configuration steps?
When installing some packages (like RabbitMQ) on Debian/Ubuntu machines, the post-install step defaults to starting the service.
While this is great in most cases, in some cases (when you already ...
- 875
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Compute a list of difference between packages installed on two hosts
I just add some problems with my Debian virtual servers and I add to reinstall all of them from scratch. However, I still had access to the old version and I could retrieve the list of installed ...
- 603
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Running out of memory running fsck on large filesystems
I look after an old Debian linux box (running etch) with only 512 MB of RAM, but a lot of external storage attached. One ext3 filesystem is 2.7 TB in size, and fsck can't check it, because it runs ...
- 1,450
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Linux router: ping doesn't route back
I have a Debian box which I'm trying to set up as a router and an Ubuntu box which I'm using as a client.
My problem is that when the Ubuntu client tries to ping a server on the Internet, all the ...
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SSH fails: PTY allocation request failed on channel 0
So I googled the error and checked serverfault, but the solutions didn't fit. Most results were problems with /dev/pts, but that is mounted. Other results are errors with git, but there is no git on ...
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SSH if command output is more than about 5 lines
I've been advised to ask this question here:
I'm baffled by the following issue I'm currently experiencing.
I have a Debian 5.0 Linux server connected via an ethernet cable to my DSL router. My laptop ...
user91234
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7
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How to create a randomly keyed, encrypted swap partition, referring to it "by-uuid", on Debian?
It is sensible that if you have any sort of block device encryption implemented on your GNU/Linux system, to encrypt your swap partition too, as any decrypted data may be written in cleartext at any ...
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Enable blowfish-based hash support for crypt
How do I enable crypt_blowfish support for shadowed passwords and PHP on a Linux (Debian) server?
I'm referring to the OpenBSD-style Blowfish-based bcrypt, known in PHP as CRYPT_BLOWFISH.
As far as ...
- 377
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SSH session never closes when executing "apt-get install"
Problem
When running apt-get install in an non-interactive SSH session, the session never closes. Example:
ssh user@target "sudo apt-get -y install my_package"
The my_package does get installed ...
- 367
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4
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2k
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How to store data on a machine whose power gets cut at random
I have a virtual machine (Debian) running on a physical machine host. The virtual machine acts as a buffer for data that it frequently receives over the local network (the period for this data is 0.5s,...
- 249
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How to Enable IPtables TRACE Target on Debian Squeeze (6)
I am trying to use the TRACE target of IPtables but I can't seem to get any trace information logged. I want to use what is described here:
Debugger for Iptables.
From the iptables man for TRACE:
...
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Ubuntu - /usr is full up, recommend anything in there I can delete?
A friend of mine partitioned his ubuntu system with /usr on a separate partition. That partition is now full. He can't use apt to install new software. Is there anything in /usr that he can safely ...
- 32.3k
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Allow complex sudo command on Debian Linux
I need to allow a specific command on a Debian Linux box for a single user. I've tried this in the /etc/sudoers file:
# User privilege specification
zabbix ALL=NOPASSWD: /usr/bin/apt-get --print-...
- 3,157
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Is there a way to remove "Last message repeated x times" from logs?
I have a script that updates me on any changes to the kernel log on my (Debian) servers.
The problem is that occasionally the log contains lines like:
last message repeated 4 times
I realize that ...
- 23.3k
13
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5
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Set JDK 8 as the default Java on Debian 8
I'm trying to set the Java SDK 8 tools (installed from the debian backports repo) as the defaults.
# update-java-alternatives --list
java-1.7.0-openjdk-amd64 1071 /usr/lib/jvm/java-1.7.0-openjdk-...
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Default arp cache timeout
I didn't found how check and change the default arp cache timeout on Linux.
I using debian with kernel 3.x (but I supposed it same with older kernels)
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nmap on my webserver shows TCP ports 554 and 7070 open
I have a webserver that hosts various websites for me. The two services that are accessible outside are SSH and Apache2. These are running on a non-standard and standard port, respectively. All other ...
- 237
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Starting a script as another user
I've created a script in /etc/init.d/ which has to run several other scripts from other (non-root privileged) users from their home directories, as if they started them.
I launch these scripts with:...
- 1,861
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How to do port forwarding/redirecting on Debian?
I have two questions.
Question 1: My debian machine has interface eth3 with ip 192.168.57.28. If someone tries to connect to 192.168.57.28:1234 how do I redirect the request to another machine: 192....
13
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7
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Find (and kill) old processes
Basically I need to be able scan the process tree and find processes that match a certain name and started running more than a week a go. Once I have them, I need to kill them. All the processes are ...
- 3,127
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How to remove 'update-alternatives' links on Linux
Sorry for asking this, but I cannot resolve such a simple issue for a few hours:
I made a typo mistake in
update-alternatives --install /usr/lib64/R/lib/libRblapack.so libRblapack.so /usr/lib64/R/...
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