Questions tagged [administration]

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Mdaemon & superadmin password

i've to migrate Mdaemon mail server to postfix/dovecot server. It's possibile in Mdaemon set a superadmin password as in dovecot? thanks in advance
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1answer
15 views

Not changing permissions as root on git pull

I've been managing a not very big system for a few months now and there are still a couple of issues that I don't like how they're being dealt with right now. Currently, there is practically just one ...
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1answer
23 views

Prompt string not set properly in Bash for new user

I'm using Kali Linux for one of my classes, and part of our first assignment is to create a custom user account using our names instead of the default kali login, however when I do this it messes with ...
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13 views

firewalls, PackageKit, and cripplingly slow wireless throughput (oh my)

I'm a bit out of my element here, as network operation and security aren't something I have much experience with. My question relates to abysmal internet speed (speedtest results in 1Mbit down / '...
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11 views

Ubuntu 16.04 web server consistent intermittent freezing

I've got a DigitalOcean droplet, Ubuntu 16.04, kernel version 4.4.0-200. It has been running for a few years with regular system updates and occasional configuration adjustments. No adjustments have ...
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2answers
4k views

Why does the dpkg folder contain very old files from 2006?

I know what Debian package management says: Do not erase or alter files in /var/lib/dpkg/. However, there are 11,501 files in that folder dating from 2006: $ ls -l /var/lib/dpkg/info | wc -l 11502 ...
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19 views

How to tweak Linux to work with one high-priority process?

Yesterday I tried to setup minecraft server on my new board. It needs a lot of CPU while booting. All six CPU's of my board are working full speed then for a while (10 - 30s) and then Java (because ...
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1answer
70 views

limits.conf not working for SSH connections on Fedora 33

I am trying to set a limit on a group called rlimited. I have the following in my /etc/security/limits.conf @rlimited hard cpu 5 The same file exists in the /etc/security/limits.d/ folder. I've also ...
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43 views

Reverse DNS does not match SMTP Banner | Multiple Domains

Hi there I have multiple domains on a vps server connected to my main server and mxtoolbox is giving me a repeating warning Reverse DNS does not match SMTP Banner for all domains except one of them ...
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2answers
135 views

How can I list all currently logged-in users?

I have a system I'm managing (running RHEL 8) that has multiple users in our small office, who log into it in various ways -- locally at the console, remotely via SSH and NoMachine Workstation. When I ...
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1answer
25 views

Creating new user by creating new folder

I would like to ask a doubt regarding the creation of new user in Ubuntu. Normally we use "Users and Group" GUI application, terminal, etc for creating new users. But I would like to know, ...
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108 views

How to open a text file as administrator in Pop OS 20.04?

I have just installed Pop OS 20.04. Previously I used Ubuntu 18. I need to open a text file in root directory as administrator. In Ubuntu I could do it by installing nautilus-admin, then after right ...
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70 views

Missing space on root partition

I know, there are dozens of similar questions everywhere. I have looked at many of them, and checked what their answers suggested, to no avail. My root partition (btrfs) is almost full according to df:...
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1answer
314 views

Give a user admin right to run yum on centos 8

I give a user admin access with: usermod -a -G wheel userX but when I log in with userX, I am not able to run yum. What do I need to do? Thanks
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1answer
7k views

usermod: group 'sudo' does not exist in CentOS

I want to grant a user sudo access. I suppose mainly I want to grant privileges to install software, and am not quite sure how to this in CentOS: https://linuxize.com/post/how-to-add-user-to-sudoers-...
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45 views

How to speed up the usb drives?

Lately I'm using usb 2.0 drives to move things around,in order to free a bit of local traffic, but unfortunately it takes so much time to write things. A first approach is to use a no sync feature ...
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24 views

“who/w” command fails to list active user logged in from SSH client session

I (logged in as "user1", has root access) was following this to experiment with kicking a client ssh session logged in as "user2" (has no root access), connected from the same network from a laptop. ...
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2answers
4k views

Is there a GUI to edit/add users and groups

Is there a graphical tool that shows (edits) all users and groups on the system, so that one can avoid editing /etc/passwd and /etc/group directly? GNOME Settings (gnome-control-center) Users view ...
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2answers
119 views

How much safe is to allow a stranger Wordpress admin access to a CentOS node?

I am creating a website with Wordpress 5.2 on a CentOS Linux 7.7.1908 node. PHP version is 7.x. I have asked assistance to the creator of the theme that I am using. The creator asks me admin access ...
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1answer
83 views

How to switch to another user on the terminal in SLES 12?

I created a user (useradd -d /home/newuser -c "My new user" -s /bin/true newuser), set a password (su newuser), and want to work under this username. But I cannot switch to this user. No error ...
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154 views

DMI table unreliable?

From the dmidecode man page : the presented information [is] possibly unreliable. They also add: More often than not, information contained in the DMI tables is inaccurate, incomplete or ...
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0answers
114 views

Debian 'bullseye' - no Terminal without GUI on Function Keys F1-F12

I had some serious problems with a Gnome upgrade from 3.32.0 to 3.34.0. I missed out the upgrades done with apt full-upgrade and my gnome-shell did not start anymore. However I wanted to fix this ...
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1answer
540 views

How to limit access to websites for one user?

I need to limit all websites for certain user (not a root) but one website should be available for example www.allow-website.com and all subdomains too www.allow-website.com/*. This lock should work ...
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1answer
285 views

How to equalize byobu vertical split screen size

Note: I may be leaning on an XY Problem; feel free to steer me to a more ideal approach. I want to keep an eye on multiple remote log files in a small-yet-legible font, not so much analyzing ...
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1answer
668 views

How do you cleanup after deleting an LDAP user on RHEL 7?

We have a small network using 389 Directory Server for LDAP. We make LDAP users, those users log on to various machines in the network, and then sometimes we delete those users. However, after ...
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30 views

Getting a rolling release just right and then freezing it: a good idea?

I really like how rolling releases offer the latest versions of everything, because sometimes that is important. However, once I have things working well, I am not that anxious to keep updating to the ...
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1answer
85 views

Why does the solaris-8 “scadm shownetwork” command show a different IP address that the one that is actually configured?

When I run the scadm command, the IP Address is different than the one I have configured on my server: 55 /usr/platform/SUNW,Sun-Fire-V210/sbin> uname -a SunOS UI1 5.8 Generic_108528-29 sun4u ...
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1answer
43 views

tmux two seperate panes with some process

I am working with another developer on the same dedicated server. Currently we have one tmux session with one tmux window and multiple panes on that window. This allows us to have a nice workspace ...
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1answer
27 views

A single unified account for all users on a single machine, while preserving separate credentials

So this is more of a reverse-engineering question. We have this machine at work, where anyone can login using ssh. ssh johndoe@gateway01. However! Once logged in, the user the person is logged in as ...
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2answers
2k views

Unable to mount LV: “mount(2) system call failed: Structure needs cleaning,” but e2fsck says clean

I was trying to install an old optical drive into my system, which turned out to be having problems, so I pulled it out again, but upon rebooting back into Ubuntu 18.04, I'm unable to mount my 3-drive ...
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1answer
8k views

Add “domain admins” group in sudo users [duplicate]

I want to give access domain admins group to sudoers access. I have come across with many commands but nun of works for me. fname.lname ALL=(ALL) ALL With this command i can give access to a ...
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1answer
44 views

How to find if partition is soft partition or not - Solaris 10

How to find if partition is soft partition or not in solaris 10?
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1answer
60 views

Which programs configure the network based on the settings in /etc/network/interfaces?

I have installed Stretch and I find that NetworkManager gets in my way more often than not, and I would rather familiarize myself with network interface administration at a lower level based on the ...
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1answer
250 views

useradd with no options

When I create a user with useradd (no option) I can later add his passwd by using passwd new_user. How can I create his correct home directory (with Desktop and Templates inside) and all other ...
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3answers
406 views

Are there any practical reasons for setting a maxlogins limit for users in limits.conf? What are the benefits?

Why should I set a maxlogins limit in /etc/security/limits.conf? In other words, are there any performance-related and security-related benefits to be gained? I have only three users on my machine, ...
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4answers
2k views

Is it common to install zsh on production servers? [closed]

Question may be not clear and too broad, but any answer, however short or broad it may be, is very appreciated. Some time ago I've asked to install zsh on our production server. My admins companies ...
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1answer
591 views

How to reset router through command line browser? [closed]

I need to reset router and I just get access with ssh to raspberry in local network with router. I'm trying with elinks and w3m browser but I can't see any option, maybe because the router's control ...
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1answer
441 views

How to make adduser add home sub directories without GUI login? Make user set password on first login?

I have a client that needs to connect to one of my machines through ssh (Debian stretch). When i create his account with the adduser command, he recieves a home directory but there are no ...
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2answers
323 views

Where to put computerdescription in linux/unix (like in windows “computer properties”)?

Question: Is there a place in linux (e.g. debian/ubuntu) to put the computer description? Meaning: are there directives or best practices (I didn't see it in the FHS)? (Maybe a file /etc/hostinfo?) ...
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1answer
2k views

Is it possible to run a bash command from Windows via a samba connection?

Now, before you finish thinking "Dear God! why would you want to allow that?!?", I'm wondering if it's possible. What I'm trying to solve, could be solved in other ways, but this puts it in the ...
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3answers
17k views

Write access to NTFS drives

Never had this problem before. The drives will not give me write access Drives are ntfs. Fstab was set on default, now tried rw option and nothing. Using Manjaro. How can I get write access to drives?...
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1answer
3k views

df not update result after lsof search and reboot

I m having a problem with df command, my / fs look like this: Size Used Avail Use% Mounted on /dev/mapper/rootvg-lv_root 945M 811M 69M 93% / ...
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3answers
2k views

How to see what a user is doing in their ssh session

I logged into a server as root and did w, this let me see that a user was editing a file. someuser pts/5 10.117.0.53 14:03 3:25 1.20s 1.14s vi somefile.py Then I disconnected, and ...
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0answers
4k views

User denied permission to read his own home directory

Note: Username modified for public post. I have a linux server on which I have root privileges. There is a user account "privuser" which can only be SSHed into using SSH keys. But, due to some user ...
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1answer
105 views

postfix configuration

I started to use postfix, and configured the /etc/postfix/main.cf file. After that I runed postfix with postfix start command, but got an error parameter mail_owner: unknown user name value. Please ...
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3answers
6k views

How to disable systemd agressive emergency shell behaviour?

By default systemd drops to an emergency shell at the slightest error. For example, if one of the mounts at fstab fails for some reason the system becomes unbootable immediately. I manage dozens of ...
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1answer
178 views

Run basic administrative commands on GoDaddy

I've logged into my GoDaddy server through PuTTY, I'm connected as ted67942 which is not the root user. I'm trying to run basic commands like sudo, dpkg, su, etc. but they all return the "command not ...
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2answers
1k views

What is the Debian counterpart of the admin group, and what group on Debian makes files accessible to only the owner and the administrators?

Debian vs Mac OS X regarding the admin group On Mac OS X, in order to make a file accessible to only the owner and the administrators, I set the group of the file to admin, and set the permission ...
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44 views

Commands queueing across different users

I want to be able to queue commands across different users on one machine so calculation resources would be used in order and not simultaniously is there an util for that? I found tsp but I think it ...
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0answers
298 views

StickyBits NFSv4 ACL to stop user movement of folders

Backstory: Client has a mixed environment of POSIX and NFSv4. The POSIX blows away the underlying NFSv4 ACL every-time they touch it or do anything with it. They say that users are able to take a ...