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2
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3answers
502 views

Do I need a computer science degree to have a successful career in Linux? [closed]

I recently got a bachelor's in hospitality management, for 4 years I basically lied to myself thinking thats what I want to study while neglecting my interest in computer science. I've been getting to ...
2
votes
1answer
70 views

Manage another Linux installation on another partition in the same computer

How can I manage (install packages, manage packages, check for updates and the like) for another Linux installation on another partition in the same machine? I would be doing this from Ubuntu, and ...
2
votes
1answer
387 views

Should I use useradd or adduser?

I am trying to add a new user to the system. I am confused though which command to run: useradd or adduser?
2
votes
1answer
40 views

When is a port considered being used?

I am getting port in use cannot bind on process restarts. I am trying to find out when a port is considered being used? Is it only when in LISTEN mode? Can it also be if a connection is open to the ...
2
votes
2answers
87 views

Global Shell Variables?

As a system administrator with root access on a unix machine, is it possible to provide default shell variables to all users of a system? That is, as an individual unix user, I can define ...
2
votes
2answers
154 views

Any interface for building a server in Linux Xubuntu. (not desktop)

Is there any interface or program that I could install on my Linux Xubuntu that would help me set up a server using the terminal as little as possible?
2
votes
1answer
205 views

NIS and /etc/passwd

Shadow passwords are to be avoided in a NIS server, as suggested in this guide at paragraph 7.6. So: in a NIS server (a Unix or Unix-like system), should all the users be migrated to /etc/passwd from ...
2
votes
2answers
157 views

Is there a way to administrate multiple computers at the same time?

Let's say you have 24 computers. They all have the same Linux or Unix distro on them, with the exact same configuration, but with different users. Is there a way to be able to do the exact same thing ...
2
votes
1answer
76 views

Winbind / AD - changed user account issue

So here's an odd one. We've had a user for years who happens to have a user id by local convention that matches a system account. So of course, I changed the users user ID in AD to avoid issues and ...
2
votes
2answers
416 views

AT&T UNIX System V Release 4 - How do I create a new “Administrator” user?

I am running AT&T UNIX System V Release 4 Version 2.1 inside VirtualBox, and want to create a new "user account" for myself. At first, I simply created a new user with the useradd command, but ...
2
votes
1answer
318 views

Integrating LDAP and Kerberos V to add users via a useradd-like interface

I'm currently trying to set up an integrated Kerberos V/LDAP system for authentication/authorization. From what I have managed to gather, there are at least two ways to integrate Kerberos V with LDAP: ...
2
votes
2answers
50 views

Reassign users to a single group

Right now one of our server is setup such that all users are in their own group. Is it possible to reassign them to a single group and then allow each user READ only access to other user's ...
2
votes
1answer
33 views

static ip adress for remote administrating distant home computer via ssh?

i've set up the pc of my grandmother with debian and dhcp. I have to administrate that pc, so the best option is obviously ssh. The problem with that is just dhcp changes obviously the ip adress from ...
2
votes
0answers
112 views

Prevent scp from overwriting existing files?

Have been googling this for a while, and the problem is not so much of one where I trust my users to "do the right thing" and have them use rsync with various options to avoid overwriting files. I ...
2
votes
1answer
94 views

Remove ex-admin user account and grant privileges / permissions / ownership to another

I would like to find the simplest way to remove the old system admin's user and group from a Gentoo server and put them all under my name instead. He no longer works here and it would appear that a ...
2
votes
1answer
126 views

How to specify a daemon shutdown command with upstart?

In an upstart configuration how do I define what command should be used to shutdown a server. Lets say I have daemon that has two seperate processes. startup.sh - to start the server shutdown.sh ...
1
vote
1answer
901 views

How to prevent users from renaming files while providing write permissions on Linux [closed]

For some special purpose, I want to prevent non-root users of the Linux Server from changing or renaming the filenames. However, they can modify and write to the contents of the file. How to do this ...
1
vote
3answers
6k views

Set a size limit to SAMBA shared directory remotely

I have been asked to set up a shared directory for a colleague on a server I manage. I created an account for him on that server, set up a Samba password with smbpasswd, created a directory and set it ...
1
vote
2answers
448 views

Does DM-Crypt partition look like random noise?

If I format partition with dm-crypt does its entry in partition table suggest somehow that this partition is encrypted or for someone from outside it looks like regular partition with random noise ...
1
vote
2answers
52 views

Weird disk usage on Enterprise Linux

I'm little bit worried about this (note the 99% used space in the root): $ df -h File System Size Used Free Use% Mounted To /dev/mapper/scientific-root 50G 50G 735M ...
1
vote
3answers
220 views

How to clean up my desktop?

Now, I see that my desktop running rhel 5.6 has run out of space. Now I need to clean it up. There must be some unintentional files adding up. What I would like to be able to do is list the files in ...
1
vote
2answers
45 views

Are basic system administrator utilities such as useradd or adduser standardized?

Are basic system administrator utilities such as useradd or adduser standardized? If so, where can I find the specs? (POSIX doesn't seem to encompass those, but I might need to take a better look).
1
vote
1answer
18k views

Important scripts useful for a Linux system administrator [closed]

I am a Linux system administrator and constantly find myself doing the same chores again and again. I need some scripts to make life easier. What are the most important scripts needed by a Linux ...
1
vote
2answers
309 views

Browser-based front-end to linux

I'd like to ask if anything like this exists. A browser-based tool for looking at a Linux system, managing it, and helping newbies diagnose problems. What I'm thinking of is something like this : ...
1
vote
3answers
84 views

Linux SW RAID and physical volumes

In each guide about software RAID in Linux, I could find online I see that people usually create/assemble RAID devices using partitions, like: mdadm --create --verbose /dev/md0 --level=5 ...
1
vote
1answer
45 views

How can I administer a server if USB disabled?

I'm looking to disable USB via the kernel for a high-performance server. How can I effectively administer the server, if problems occurs if USB isn't enabled? Without USB, keyboards and mice ...
1
vote
1answer
759 views

How can I learn some advanced logrotate techniques? [closed]

The logrotate section in the Linux administrator's handbook is very brief. The man page is ok but lacks examples. Where can I find some more comprehensive information, examples, and best-practice ...
1
vote
1answer
503 views

What unix certifications are available? Are there any self-taught?

I have a friend who is a Red Hat Certified Engineer. I also know there is the Linux Professionals Institute LPIC-1, 2, & 3. Are there other popular ones? How do I pick one to start with?
1
vote
1answer
202 views

Mass update of /etc/ldap.secret

I have a group of servers authenticating against an LDAP server. I would like to be able to periodically update the /etc/ldap.secret file with an updated secret. I've written a small script that reads ...
1
vote
1answer
68 views

Equivalent of newusers for groups

The newusers command is useful for adding or modifying users in bulk. Is there an equivalent command for managing groups?
1
vote
1answer
21 views

Share files/directories by setgid

To allow write access to a specific group, shared files/folders can be made writeable by default for everyone in this group and the owning group can be automatically fixed to the group which owns ...
1
vote
1answer
114 views

Unable to get last connection info for SSH users (locked, no shell, public key) is there an alternative?

I have several remote systems connecting to my server via SSH to establish tunnels. They authenticate using a public key, their user is locked and their shell is set to /usr/sbin/nologin It all ...
1
vote
1answer
80 views

How to provision software across multiple laptops [duplicate]

I've got a bunch of laptops for my classroom and I'm using Ubuntu. I want to be able to add/update/remove software across them as easily as possible and I'm not sure how to go about it. I was ...
1
vote
1answer
984 views

Which book of those two should i read to study networking for Unix/Linux administrator? [closed]

I'm quite a beginner to networking, I want to get the information that i need as a Linux/Unix admin. I have two books in hand right now: TCP/IP Illustrated, Volume 1: The Protocols UNIX and ...
1
vote
1answer
80 views

Embedding a cmap in moinmoin

I'd like to embed a cmap in a moinmoin wiki page. I generated the cmap using dia. I then copy pasted the generated html code, modified it to point to the png image I attached to the wiki. However ...
1
vote
0answers
21 views

Managing cron jobs across multiple servers

We are facing a problem with managing cron jobs over multiple servers with dependencies. I hope there is an opensource central management project that I can be used to handle that and report the ...
1
vote
0answers
24 views

How does shutting down require sudo except when done through a GUI? [duplicate]

If I want to shut down my machine programmatically or on the terminal, I must do sudo poweroff or sudo shutdown. If I want to shut down my machine through my window manager and desktop environment, I ...
1
vote
0answers
127 views

What is the command erepc? Is this malware?

I noticed that my system was running slower than normal so I ran a top command. Hogging a ton of my CPU was a process called erepc that I can find no information on. PID USER PR NI VIRT ...
1
vote
1answer
526 views

Script to see if user has logged off

I have created this program to see if a user is logged on and it checks every minute. if [ "$#" -ne 1 ] then echo "Usage: mon user" exit 1 fi user="$1" until who | grep "^$user " > ...
1
vote
1answer
2k views

Rehashing /etc/shadow. Can I force NIS users to change password?

I'm currently migrating a CentOS environment to a Debian one. The users log in over the network using NIS. I was hoping to copy /etc/shadow from my old server to my new one so that we can offer ...
1
vote
0answers
113 views

Problem with NIS [duplicate]

Possible Duplicate: NIS and autofs error I have one server and one client machine. In Server, I have configured NIS, and /home/guest/nis1 is shared through NFS. Both NFS and NIS are ...
0
votes
5answers
348 views

change of Unix default directory structure [closed]

Is it possible to change the default Unix/Linux directory structure? I mean by configuration and without need to change the kernel. Or if the kernel has to be edited, how hard is such task? Is the ...
0
votes
3answers
190 views

Get contact information of system administrator from the terminal

Do any of the common Unix/Linux platforms provide a way to query the system administrator contact information from the command line. Obviously a system admin might not include this information when ...
0
votes
3answers
583 views

/etc/passwd permissions and GECOS field

The default permissions on Ubuntu (or even some BSD) distributions for the /etc/passwd file are 644. It is pointed out in questions like this that /etc/passwd is a sort of user database and it is ...
0
votes
1answer
1k views

Need help with understanding output of ps -ef on linux

When I do ps -ef on my Linux box, I get: UID PID PPID C STIME TTY TIME CMD Please help me with meaning of C,TIME. is the TIME , the actual cpu time allocated to the process?
0
votes
3answers
549 views

How to limit administrative privileges to various config files?

I want one administrator to be able to edit the /etc/fstab file but one administrator to not be able to edit the fstab file. Both administrators need access to all other administrative tasks. Is ...
0
votes
1answer
43 views

How to live a Pleskless life? [closed]

I have always used Linux with Plesk when hosting web projects. It's easy to host multiple websites and setup email accounts but I realized it's overkill sometimes. I think it uses a lot of resources ...
0
votes
2answers
42 views

Compare Linux configuration with default

My system fails to upgrade. I suspect it was breached. Is there a way to compare system configuration to default version that should be at this date and kernel version? My current system is Debian, ...
0
votes
3answers
511 views

Where Is MySQL installed on My Machine?

What is going on, everybody? Recently I have installed MySQL server on my Debian machine using Advanced Packaging Tool, and I am curious where it is installed and how I can find all the source files ...
0
votes
1answer
66 views

How to issue a warning to administrator (when the administrator issues a system restart) when user has process running

Background I work on a development team and for each project we have a different server setup to emulate the environment of our customers. It can be hard to keep track of what I was doing on each ...