Questions about Computer Administration

learn more… | top users | synonyms

47
votes
5answers
4k views

What's a good back-up strategy for 1 desktop PC?

No, this is not a comparison of back-up tools, nor is it a solicitation on What to backup or Why and only a little bit about Where to backup and When to do it. This is basically a strategy question: ...
41
votes
9answers
37k views

How can I make shutdown not require admin password?

If more than one person is logged in on my computer, Ubuntu requires super user authentication when shutting down the computer. How can I make it so that any user can shutdown the computer without ...
8
votes
2answers
8k views

I unexpetedly deleted administrator account and the other accounts are asking root password

I unexpectedly deleted my user account (the only administrator for the machine). I have another account which is standard account now i cant access my hard disk or anything with that standard account ...
0
votes
0answers
26 views

Giving r-x permissions to directories of other users

I have an Ubuntu 14.04.1 server with the such permissions scheme (given below in user:group format): root: root super: sudo master master1: master master2: master user1: simple1 user2: simple2 ... ...
0
votes
1answer
25 views

Add two root users during installation during installation + managing it - Ubuntu server

I would like to ask you all, that is it possible to enter some kind of script before entering the setup screen to be able to add 2 root users instantly. I am at the beginning of creating 190 virtual ...
2
votes
5answers
17k views

Ubuntu 14.04 Unknown Display

I have installed Ubuntu 14.04 in my machine(with Gigabyte motherboard), having an Acer 19" Monitor. Unfortunately its resolution not working properly. See the image. This is my xrandr -q output. ...
3
votes
1answer
7k views

Is there a central configuration tool for ubuntu such as yast on opensuse?

In openSUSE there is a set up tool called YaST working on GUI and command line. Is there such tool for Ubuntu for instance on YaST one can configure samba and the services. Here is a picture for ...
0
votes
0answers
32 views

sudoers_policy, 'sudo' doesn't work?

When I open a terminal and type sudo in order to install or remove applications, it shows: sudo: error in /etc/sudo.conf, line 0 while loading plugin `sudoers_policy' sudo: /usr/lib/sudo/sudoers.so ...
0
votes
2answers
37 views

Linux / ubuntu knowledge [duplicate]

I'm quite new to linux. Fo few years hardly using linux (seen some distros). I have general knowledge about bash programming, administration. Lately have dived into Raspberry PI and Ubuntu based ...
1
vote
2answers
58 views

Why does apt-get marks packages I dont want directly?

If I try to install metapackage apt-get install lubuntu-desktop and then see the output of apt-mark showmanual | grep lubuntu I see much more than just lubuntu-desktop: lubuntu-artwork lubuntu-core ...
1
vote
0answers
109 views

Change notification email subject - Nagios

Anyone can give an idea about, how can I change my Nagios email alert subject? I have google for sometime and every result says to change the command(notify-host-by-email) definition in commands.cfg ...
10
votes
5answers
37k views

What server control panels are available for Ubuntu Server?

As a dedicated Ubuntu server or as a VPS, I am looking for a web control panel, something like cPanel which is something like a web administrator for a server. I have not used any on Linux since I do ...
20
votes
3answers
73k views

How to give nopasswd access to multiple commands via sudoers?

Below is what I know: I have to add this below line in sudoers file to give rights to the user for particular task. user_name ALL=NOPASSWD: /usr/bin/apt-get install In this case I want to give ...
1
vote
0answers
35 views

User login directly into LXC container

Is it possible to setup host system so that some users will be immediately in corresponding LXC container after logging in?
31
votes
1answer
85k views

How do I add a network printer in Ubuntu 12.04?

I know the name and the IP address of a network printer, but I can't seem to be able to search by IP address or name. Ubuntu developers love to move things around to make it difficult for users, so ...
0
votes
0answers
55 views

Alias remained after removing a package. How to remove it?

I had some errors with nodejs so i wanted to reinstall it. I removed it with sudo apt-get purge nodejs But now if i type nodejs it says bash: /usr/local/bin/node: No such file or directory So ...
1
vote
2answers
51 views

Is there a numbering convention for xorg.conf.d files?

I have had to set up custom xorg.conf.d files on several boxes and one nagging question finally can't be ignored: Is there a numbering convention for these files? Does the number control load priority ...
0
votes
1answer
24 views

What is the best tool to manage several Ubuntu stations over network? [duplicate]

Wich are the options for Ubuntu Desktop management over network? Not installation deployment over network. Management of more than 1000 Ubuntus desktop over network. Something like Red Hat ...
1
vote
0answers
23 views

Automatic software management for user groups

When adding new users, is it possible to install software based on their user groups? For example a Netbeans IDE for say a 'Java development' group or a LAMP stack for a 'web development' group. ...
3
votes
1answer
278 views

How to create a file in a specific location for every user?

I'm running an Ubuntu LTSP setup at a school with about 60 unique users. Occasionally, we need to share a document, create a directory or place a config file in every user's account. Obviously, it's ...
4
votes
1answer
2k views

Is there a simple web GUI for Apache that runs on Ubuntu?

Sadly, all the answers that Google turns up seem to be way out of date (Rapache for example no longer runs on Ubuntu it seems). I'm running Ubuntu Server 14.04 (Trusty Tahr) with a Lubuntu interface, ...
0
votes
0answers
53 views

permanent disabling ip_forward for ubuntu server happens be a problem

I have just installed the latest ubuntu server. This is the state of my server right after booting: root@vzu01-ubuntu:~# uname -a Linux vzu01-ubuntu 3.16.0-30-generic #40~14.04.1-Ubuntu SMP Thu Jan ...
15
votes
4answers
951 views

Which logs should I pay attention to?

There are many logs in /var/log/ For a standard home installation, which ones should I be checking regularly?
0
votes
2answers
45 views

New program development - need help

I would like to develop a new program for Ubuntu that will monitor the user's activity ,If user frequently uses a particular software "X" in certain time (like 8:00 A.M - 10:00 A.M ) ,when the time ...
3
votes
1answer
120 views

As an administrator how to restrict users from Installing certain packages?

I want to know how does an administrator disable users/groups from downloading certain packages. For example, let it be the youtube-dl package which enables download YouTube videos, or let it be ...
1
vote
3answers
27k views

Is it possible to install Ubuntu through network?

I would like to install Ubuntu for almost 120 users. But it's very difficult in using USB and drives. please suggest ....
1
vote
2answers
215 views

How does the system admin gets the ethernet address of computers in the network?

I am very new to system administration. Have a doubt, how does the system admin gets the Ethernet address information of the computers in the network. Actually my doubt is how does he determine the ...
12
votes
1answer
21k views

ntpd vs ntpdate: pros and cons

In order to keep the time accurate on a Ubuntu system one can either: Run the ntpd (network time protocol daemon) which will run all the time and continuously adjust the system time when clocks ...
1
vote
3answers
394 views

How to hide administrator account or root in Login screen? [duplicate]

I used Ubuntu 12.04 and I want to only user account appear on the Login screen without guest and administrator account. My administrator account cannot view to everybody when their Login. ...
0
votes
2answers
40 views

Administrators can change passwords of other administrators

I seems that a user set as an "Administrator" can change passwords of not only "Standard" users, but also other administrators. Is there a way to make it so that administrators (there are multiple on ...
6
votes
2answers
848 views

useradd doesn't allow the user to log on

On an Ubuntu 14.04.2 LTS the following command: adduser fu and then entering a password bar and just pressing Enter on all other questions, creates a user that allows me to log on and has the ...
3
votes
2answers
497 views

Is there an SSH client which duplicates commands to multiple terminals?

I'd like to control several ssh connections from one terminal. For example, I would type ifconfig in the main terminal and all the other ssh connections would run ifconfig. That's what offered PuttyCM ...
2
votes
2answers
518 views

Monitor RAM and CPU usage on Remote Server?

I want to monitor the CPU and RAM usage on my remote server and set up a notification system which notifies me when the RAM usage is high and automatically kill that process. I tried the Nagios ...
0
votes
1answer
377 views

Mounting Extra Hard Disk in Ubuntu

I have bought a new 1TB hard disk and formatted in ext4 file system type and attached to my CPU(Already having a HD with Ubuntu installed). Following the answer given here, I tried mounting the ...
1
vote
1answer
79 views

How to change permission to the users on ubuntu 12.04?

How to change permission to the users to restrict their accessibility? I want to cannot see or cannot access the System Files, Devices and Network in home folder? I used ubuntu 12.04 Thanks, Jerrick ...
0
votes
1answer
526 views

shutdown 5:30pm every day

for a five thirty pm shutdown, should I change this: 30 02 * * * /sbin/shutdown -h now to: 30 17 * * * /sbin/shutdown -h now see also: Crontab Shut down command didn't work
0
votes
1answer
522 views

Lubuntu 14.10 won't update or shutdown

I started up my computer and used the terminal to check some network settings, but when I tried to turn it off again, a message shows up at the bottom of the shut down menu: ...
6
votes
1answer
6k views

Allow non-admin users to mount drives via nautilus

I want to give mount privilege to the non-admin users to mount the drives via nautilus. I don't want them to give other admin privilege. I also don't want to use setuid method. How can I achieve ...
0
votes
1answer
3k views

how to install and configure Glassfish 4

How do I install Glassfish 4.x and run it on port 80? While it's easy enough to download Glassfish and unzip it, should it go in a particular directory? Which user should start and stop the server? ...
0
votes
1answer
189 views

Prevent standard users from seeing and running some apps

How to control just some apps to be available on other accounts, Not all of them?
8
votes
4answers
23k views

Deleted Myself from Admin Group - Now Getting Error usermod: cannot lock /etc/passwd; try again later [duplicate]

Possible Duplicate: Cannot lock '/etc/group' in recovery mode I have a laptop with Ubuntu 11.10 that is shared between myself and two other family members. My user id was setup as ...
0
votes
1answer
275 views

How do I unlock system tools such as users and date and time

I'm using Ubuntu Server 14.04 with Gnome and suddenly I can't unlock system settings such as Users and time & date: the unlock icon is grayed out even though I'm an administrator and terminal ...
1
vote
0answers
199 views

Application Whitelisting

How does an Ubuntu administrator implement application whitelisting? For example, if I create a LAMP server and I only want SSH, Apache, MySQL and PHP to be able to execute. How can I prevent any ...
1
vote
1answer
1k views

HELP! I'm locked out of all Ubuntu accounts

I was using these commands in terminal: sudo apt-get install gksu gksu nautilus I needed to move some files from one account into another & then I wanted to rename some of the accounts. I got ...
49
votes
5answers
53k views

How are administrators supposed to read root's mail?

What is the Ubuntu way for system administrators to receive system notifications, which typically take the form of e-mail sent to the root account? Examples of such notifications are the output of ...
0
votes
1answer
127 views

Can not Install on a Dell Latitude laptop --

The laptop always boots winXP and requests an Administrator password. I went into the setup where I attempted to reset all passwords and the start up order but the Admin password is still demanded. ...
2
votes
1answer
67 views

Show all installed packages which are not dependencies

I would like to clean my fresh Xubuntu installation a bit. To do this I would like to print all installed packages that are not installed as dependencies. In other worlds I would like to list all ...
2
votes
1answer
236 views

how to make scripts which will run on installation of apt package

I have created a bash script which will store some data into a mysql database. Then I have created deb file with that script and made it available for installation by creating local apt repository. ...
0
votes
1answer
3k views

glassfish: Authorization has been refused for credentials [user: admin] given in this request

On Ubuntu 14.04 Tahr and Glassfish 4.1, I managed to reset my glassfish master password as so: ejb@ix:~$ ejb@ix:~$ glassfish4/glassfish/bin/asadmin change-master-password Enter the current master ...
2
votes
0answers
213 views

How much context switching is too much?

I am running Ubuntu Server 14.04 on an Lenovo IdeaCentre d400. The load average is never under 1.0. So I started to take a deeper look. I do not find anything that could be responsable for this load. ...