Ubuntu Servers :: Max Limit On Filling Up A Non-root Partition?
May 18, 2011
I have a number of servers I manage, and one of them is archiving old data that is never modified on a separate partition. This partition is at 100% capacity. A friend of mine says this is an unsafe way to keep this partition, even tho I don't plan to add any more data to it or change anything within. I know I can archive the data to dvd, but I'd like to keep the data online for my users.
What are your opinions on this? Can I keep this archive partition at 100% capacity? Or do I risk some sort of data corruption? Should I mount this partition as read-only to help prevent any corruption?
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Dec 22, 2015
I'm booting to Kali 2.0 live from USB and wanted to add persistence, but I can't get OpenVAS setup. The setup script runs and eventually fails due to no more disk space. Here's my df -h output:
Here's gparted:
When the setup runs it fills up root (/) which is only 872mb. This is a 16gb USB so I'm wondering if there's a way to allocate some of the 11gb of unallocated space to root? I couldn't tell how to do this with gparted, would I need to build a custom Kali iso or something with different partitioning?
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Feb 3, 2010
I'm getting the following messages sent to my root account mailbox. It appears to be reporting an issue finding ntpdate, however when running the following command:
aptitude show ntpdate | grep State
It shows as installed and any ntpdate commands work with no issues, so I have no idea why this is getting regularly reported?
From root@mydomain.co.uk Wed Feb 03 18:20:01 2010
Return-path: <root@mydomain.co.uk>
Envelope-to: root@mydomain.co.uk
Delivery-date: Wed, 03 Feb 2010 18:20:01 +0000
[Code]....
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Jun 19, 2010
I really don't understand what's happening.I make a 3.5tb RAID array in Disk Utility, yet it makes it so that one partition is 3tb and the other is 500 gigs free!Why is that? Ext4 can do huge partition sizes I thought.
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Apr 26, 2010
My /tmp directory is being filled up with root-tmp.####. I suspect they are being created by bastille-tmpdir-defense.sh, but they do not seem to get removed.
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Jul 6, 2011
how would i go about deleting my old kernel?i have my ubuntu machine partitioned the way gentoo would partition a drive with a seperate boot directory. my boot directory is only 200 megs so i can probably fit 4 kernels max into it and need to eject the old ones.
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Sep 1, 2011
I am using my ubuntu server as my home router.Everything is working as expected with one exception.y DSL modem is a POS and every now and again it looses connection to the router. Sometimes it needs to be reset and sometimes it does not.Either way, when this happens my ubuntu server needs to reacquire an IP from my ISP. If it screws up when I'm at home it's no big deal, but if it happens when I'm not around my housemates have taken to hitting the reset switch on the server. I'm not a big fan of this so I wrote a script to ping my ISP's gateway. If it's unavailable it bounces the eth0 interface and tries to get an IP. I am running this script every couple of minutes in a cron job. Now I'm getting syslog entries like
Code:
Aug 9 20:31:01 portal CRON[9602]: (root) CMD (/opt/ChkAndFixNetwork.sh)
every few minutes. This is annoying and makes the logs useless for troubleshooting. I
[code]...
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Mar 1, 2010
My filesystem is almost full and the problem is in the proc folder.What does that folder contain and can I delete something from it?
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Aug 12, 2010
When building 8.04 servers, I reconfigure snmpd's logging options to prevent copious low priority messages being logged whenever our network management workstation polls them. I edit /etc/default/snmpd and change line 11 from:
Code:
SNMPDOPTS='-Lsd -Lf /dev/null ...'
to:
[code]....
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Mar 16, 2011
I have a directory /var/log/data its about 80 GB,It filling up quit rapidly.I don't have much space left in the system them So i will attaching another External HDD.My question is that i need to mount /var/log/data to new HDD.So i have old data and pulse new coming up.I don't want to copy data from /var/log/data then mount new HDD to /var/log/data you know what i am taking about is there a simple way like linking or any other.
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Jun 2, 2010
extended sata partition shrunk at 15 partition limit, how to re-enlarge i hit the 15 partition limit, forgetting it now exists for sata drives, thinking i would add more. upon creation of the 15th, it squished the end of the extended partition to meet the last logical partition, leaving a large unallocated portion after the extended partition, which seemingly nothing can be done with, just sat being wasted space. i have since deleted a few of those partitions, but so far have still failed to find a way to recoup the unallocated space back into the extended partition.
[URL]
if necessary, i'll do it the painful long winded way of backing up and starting the extended partition again from scratch, but i really rather wouldnt have to do that. i'm sure there must be a way of telling the extended partition to once again reach the end of the drive.
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Nov 3, 2010
I work for a company that makes portable devices running Linux and I was recently asked to make the underlying file system read-only for "security" purposes. Since the distribution is based on LinuxFromScratch, I know that very little writing happens at run time. So, even if the device runs on a usb flash device, I doubt that putting the root file system RO will be that beneficial. I am actually more concerned about a process actually breaking because it cannot open a file in RW mode than a process going rogue and filling the root file system with log files, etc. I'd really like to ear what kind of advantages disadvantages there really is with read-only file-systems.
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Jun 24, 2010
I am a user of a cluster. I don't want root to see/copy files from my user account(obviously). Is that possible to limit the access of root to users account?
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May 6, 2010
I have a server with 48 cores, 8 6-way Opteron CPU's. Ubuntu Server 9.04 only sees 32 processors. Is there a limit on the number of cores/processors that the server will use? Windows 2008 on the same server sees all 48 cores and the so does the BIOS, so this is unique to Ubuntu right now.
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Mar 16, 2010
Is there a way to limit the speed that apache will send a page to a specific computer in my LAN? I would like to be able to test what my pages would be like if they loaded at 25KB/s for example. My Server is 192.168.0.2 and the other 'browser' computer is 192.168.0.4.
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Mar 24, 2010
This is happening on Ubuntu 9.10 serverI'm trying to increase the number of open files allowed for a user. This is for an nginx webserver where the current limit of 1024 is not enough.According to the posts I've found so far, I should be able to put lines into /etc/security/limits.conf like this;
Code:
* soft nofile 4096
* hard nofile 4096
[code]...
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Mar 3, 2011
I have a problem with a PHP/Apache program.
The website creates a RPG character through a traditional Wizard. It calls itself with a hidden variable being the page number and tests which page and returns the page data with the page incremented.
Each page should be treated as a seperate page and so would be unique. I am echoing the contents of POST to the top of the page and so I can see variables being returned. When I get data from an Ajax query from page three it saves the data (23 post fields of no more than 25 characters for each field). Page four does the same but with less fields - but it is NOT returning the data - only four fields being those that were originally posted.
I cut/paste the function from section three to section four and changed the displayed text and the names of variables to test so there are no code errors, since page three works and is saved to a database.
So the only option is that there is a PHP or Apache2 issue when POST variables are returned? I am completely out of ideas as to why this would even be an issue or how it could possibly appear.
Is the number of variables an issue? This page is less than the previous page.... And the form is POSTed...
PS: I am getting NOTICE errors from PHP being the POSTed variables that are not displayed/returned... I used:
error_reporting (E_ALL ^ E_NOTICE);
to stop these form being reported but do I need to test each one? PPS: Using If Isset($_POST['xxx']) does NOT allow that variable through...
PS: I have the default Ubuntu 10.04 Apache2 with all the ubuntu 10.04 updates...
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Jun 22, 2011
I successfully configured a VPN using IPSec(Openswan) and xl2ptd. While roughly following this guide (among countless others): [URL]
The VPN-Connection works fine, connecting to it is also a swirl, I can reach all that I want in the network, and also the gateway to the Internet works - everything being routed through that VPN.
Now my problem is actually the next steps, and I didn't succeed finding the right result on any possible search:
a) I want to limit, that the VPN-Connection is only used for distinct connections to hosts, that aren't in a "company subnet", but the IP's are publicly available. (Example: The Target-IP 8.8.8.8 allows per iptables, that only my VPN-Host 1.2.3.4 accesses it via SSH, and thus I only can access that Target-IP via SSH when I'm on the VPN). When actually browsing to the ubuntu-website, I want, that NOT the VPN-Connection is used but rather my normal connection (as a reference: i'm on a Windows-Client - not my choice, btw.)
b) I want to have several such "limitations" grouped, and give users 'access-rights' to certain hosts (Examples: Admin gets access to all on all ports Testers get access to some machines on distinct ports CEO gets access only to the mailserver via POP3 or IMAP
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Apr 10, 2010
using kubuntu 9.04 on AMD 64,working with ISPconfig panel.I have postfix configured and have no problem getting mails with small attachments, but when they pass certain size I don't get them.Where can I configure this?
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Apr 12, 2010
I'm thinking about some ways to limit access to my web-server. It runs Nginx and php in FCGI. The server contains a large amount of information. The data is freely available and no authentication is required but other companies might like to mirror it and use on their own servers.
The requests could be limited on different levels: IP, TCP, HTTP (by nginx) or by the php application. I found some solutions (like Nginx's limit_req_zone directive), but they do not solve the second part of the problem: there's no way to define a whitelist of clients who are allowed to use the data.
I thought about an intellectual firewall that would limit the requests on IP basis, but I'm yet to find such device. Another way was to hack some scripts that would parse the log file every minute and modify the iptables to ban suspicious IPs. It would take days and I doubt this system will survive, say, 1000 requests per second.
Perhaps, some HTTP proxy, like Squid, could do this?
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Jun 7, 2010
I have a command line server that logs to stdout, which I start along the lines of ./server > log.txt
What I want to do is limit the size of log.txt, without modifying the server.
I am assuming there must be some kind of tool already that lets me do this, something like where I can pass in my server, the output file and a size limit? If so, can anyone enlighten me?
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Feb 1, 2011
I am using ssh server to connect to my Ubuntu desktop. I opened the file sshd_config and change my port number of the server.I want to put a limit on the number of clients in the ssh server.
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Mar 7, 2011
Running an nginx webserver on Ubuntu 10.04 lts In the process of trying to optimize the mysql, various tuning scripts keep telling me to raise the table cache. But they also say the table cache should stay below 1/3 of the open files limit. I can raise that in mysql, but I guess you're not supposed to raise it above the OS's open files max. So I'd like to raise it (found what appear to be solid instructions here: [URL] But... Post by Kees here says it's not safe to raise it [URL] at least, not safe under certain conditions. But I'm not clear on what the conditions are. is it safe or not? If I knew how to just raise it for mysql, I'd do that. But as you can probably see, I'm pretty new to all this. Don't want to wreck my server. (my current limit is the default 1024... wd like to go to 204
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Mar 7, 2011
I understand winxp pro limit the inbound connection to 10 and win7 to 20. Is there a limit for ubuntu server?
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May 4, 2011
I'm running nginx for static files and as a proxy server for a comet IM server on ubuntu Jaunty. On high load I'm hitting a limit of 1024 file descriptors. I've tried increasing this limit but still can't pass 1024. Does "more /proc/sys/fs/file-nr" gives me the global count of used file descriptors? Why do I see a maximum of 1024 open file descriptors in /proc/sys/fs/file-nr if this is the global count for the machine and each user should have at least 1024 allowed file descriptors by default? Is there a way to increase the limit while the server is running?
Some relevant info on my server:
sudo more /proc/sys/fs/file-nr
1024038001
sudo sysctl fs.file-max
fs.file-max = 38001
sudo nano /etc/security/limits.conf
...
* hard nofile 30000
* soft nofile 30000
I also added this to /usr/local/nginx/conf/nginx.conf:
worker_rlimit_nofile 10240;
Uncommented the following line in /etc/pam.d/su:
session required pam_limits.so
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Aug 27, 2011
How to limit emails sent outside my domain or from a user in my domain with postfix to a valid user? i.e., bob can't send email as jane both from my domain and neither can send email to bob@hotmail.com as someone other then themselves. Using postfix with dovecot authentication through mysql.
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Oct 12, 2010
Since I installed MS2 I messed up grub. Finally I got 11.3 back to its old glory.
What would be the best procedure to create a backup image with all settings and permissions ...just in case ?
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May 28, 2010
I have an Ubuntu server running in our small office. Among its many duties is report generation. It uses PHP and DOMPDF (a PHP library for converting HTML/CSS to PDFs for printing). PHP's default memory limit of 32MB is not even close to being enough to pull large amounts of data from the database and generate images/tables/PDFs with that data.
I increased the memory limit to 64MB and that is adequate for reports under 3 pages or so (varies based on table complexity, images, etc). If any user tries to generate a report longer than that, PHP just throws a "out of memory" error and doesn't make the report.
My question is: what are the possible consequences of increasing the memory limit yet again to 128MB or maybe even higher? The server isn't terribly powerful. It has 2GB RAM and 4GB swap space. I know that isn't much but this is a small office and at most I can only see two or three people trying to run reports at the same time. As for security, apache is currently only serving pages in the local network, but sometime within the next year I'll probably have it hosting a public website (currently using a hosting service). Is a high memory limit a potential security risk when exposed to the internet?
EDIT: Sorry, PHP's default memory limit is 16 not 32 as I said. Question still stands, however
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Feb 7, 2010
I have finally been convinced to partition my 500GB hard drive from a two partition setup with root and swap to a three partition setup with root, swap, and home. I found a nice tutorial about how to do this, but here is my question:
A) How much space do I leave for the root partition and the home partition?
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Sep 30, 2010
I have a SSH server set up at home listening on port 22. I have hardened the server so it is pretty secure but I want to make it even safer by editing my iptables to rate-limit incoming connections and DROP false login attempts. I have tried these tutorials but I just cant get it to work:[URL]I want the debian-administration.org tutorial to work but when I try to add the first rule in terminal:sudo iptables -I INPUT -p tcp --dport 22 -i eth0 -m state --state NEW -m recent --setI get the following:Bad argument --set'I am new to iptables and I'm not sure if I'm doing something wrong when I try to set it up. I'm using Ubuntu 10.04.1 LTS with iptables v1.4.4.
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