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Questions tagged [freebsd]

FreeBSD is an advanced operating system for a variety of architectures. It is derived from BSD, the version of UNIX® developed at the University of California, Berkeley; and is developed and maintained by a large team of individuals. It is a complete Operating System, including the kernel, drivers, and userland utilities such as shells.

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133 votes
4 answers
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FreeBSD performance tuning: Sysctl parameter, loader.conf, kernel

I wanted to share knowledge of tuning FreeBSD via sysctl.conf / loader.conf / KENCONF / etc. It was initially based on Igor Sysoev's (author of nginx) presentation about FreeBSD tuning up to 100,000-...
129 votes
11 answers
18k views

FreeBSD: Directory called ^C (really!) - how to remove?

I made a typo: $ history 169 9:34 la /usr/local/etc/ 170 9:35 sudo mkdir ^C 171 9:36 sudo mkdir /usr/local/etc/dnsmasq.d Now I have a file that is called ^C (ctrl+C)!! When I use ls I just ...
Mausy5043's user avatar
  • 1,347
68 votes
4 answers
253k views

Check OpenSSH version and update instructions on FreeBSD system

On a FreeBSD system (8.1), I am looking for instructions on how to check the running version of OpenSSH and also instructions on the best way to download install an update of OpenSSH
ICTdesk.net's user avatar
  • 1,193
48 votes
6 answers
14k views

ZFS on FreeBSD: recovery from data corruption

I have several TBs of very valuable personal data in a zpool which I can not access due to data corruption. The pool was originally set up back in 2009 or so on a FreeBSD 7.2 system running inside a ...
ssc's user avatar
  • 1,189
40 votes
8 answers
19k views

Delete 10M+ files from ZFS, effectively

I have written a buggy program that has accidentally created about 30M files under /tmp. (The bug was introduced some weeks ago, and it was creating a couple of subdirectories per second.) I could ...
nagylzs's user avatar
  • 819
40 votes
1 answer
2k views

I am going to chop the FreeBSD automounter into little pieces and boil them in oil

I am trying to expose a hierarchy of home directories to a number of FreeBSD jails. The home directories are configured such that each is a unique ZFS dataset. The jails are used for development ...
larsks's user avatar
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31 votes
9 answers
46k views

Why is Linux more popular than BSD? [closed]

Some would argue that BSD/Unix has always been more reliable and stable than Linux (not me, of course, don't hurt me!). Why does Linux always seem to beat BSD? Is it the romance of the Linux story? I ...
31 votes
5 answers
11k views

Getting ;5D when hitting ctrl + arrow key in a Terminal on FreeBSD

On centos I can skip a word by hitting ctrl + arrow (left or right) in a terminal. When I ssh into a FreeBSD box and I try the same pattern I get: $ tail -f 20120412.log;5D;5D;5D (each try = ;5D) ...
jdorfman's user avatar
  • 413
31 votes
4 answers
35k views

Should I create ZFS zpools with whole disks or partitions?

I am making zpools on FreeBSD machine. While creating zpools I observe these two cases: If I take raw disks and create zpool then I am able to form zpools and they are working perfectly. If I format ...
shivams's user avatar
  • 519
29 votes
10 answers
14k views

I just did a chmod -x chmod

So I did a chmod -x chmod. How I can fix this problem? How do I give execute rights back to chmod?
Rook's user avatar
  • 2,707
29 votes
3 answers
26k views

FreeBSD: How to know real file size on zfs with compression on?

I'm using zfs on my FreeBSD 9.0 x64 and pretty happy with it, but I find it hard to count directory real, not compressed, size. Surely I can walk over the directory and count every file size with ls,...
Alexander's user avatar
  • 844
25 votes
6 answers
63k views

How can I tell how much RAM is installed on a FreeBSD server?

As per the title: How can I tell how much RAM is installed on a FreeBSD server? Thanks!
Ben's user avatar
  • 405
25 votes
6 answers
53k views

FreeBSD vs Linux performance? [closed]

I know that FreeBSD is famous for being highly stable, secure and of course open source. So I am going to try it on one of my servers. However, I am wondering what are the pros and cons of Using ...
alfish's user avatar
  • 3,167
23 votes
6 answers
7k views

How bad is it to have multiple devices with the same SSH server keys?

I am working on an embedded device that runs FreeBSD and SSH. As you know, sshd likes to randomly generate a set of server keys when it first boots up. The problem is that we will be shipping the ...
rf_circ's user avatar
  • 381
22 votes
1 answer
13k views

FreeBSD Jails or Docker instances [closed]

What are the main differences between jails on FreeBSD and Docker on Linux? Is one considerably more secure or more performant than the other? Jails are way older than Docker instances so the code ...
Simba's user avatar
  • 335
21 votes
5 answers
46k views

How to check if RAM is running in ECC mode?

I updated this post since I replaced the processor, but the core of my question (and unfortunately the results as well) are the same. I built my first FreeNAS box and wanted to use ECC RAM since I ...
comfreak's user avatar
  • 1,541
20 votes
6 answers
52k views

Need to identify disk in zpool ... how?

I need to replace a bad disk in a zpool on FreeNAS. zpool status shows gptid/5fe33556-3ff2-11e2-9437-f46d049aaeca UNAVAIL 0 0 0 cannot open How do I find the serial # of that disk? ...
d0g's user avatar
  • 989
19 votes
1 answer
36k views

How to change default shell in FreeBSD?

The default shell in FreeBSD is sh and I really can't stand it: autocomplete is very limited, and rehash commands kill me. I feel like a one armed and one legged man... How can I change the shell ...
holms's user avatar
  • 1,604
19 votes
6 answers
8k views

Backing up a MySQL database via ZFS snapshots

I've found a number of sites talking about doing exactly this, but I'm missing a few important details. The general steps are Run FLUSH TABLES WITH READ LOCK Take the ZFS snapshot Run UNLOCK TABLES ...
Andy Shulman's user avatar
19 votes
4 answers
7k views

How do you manage and deploy FreeBSD's ports in a large environment?

I'm curious to how people are deploying FreeBSD's ports in their environment. I assume that most people using FreeBSD are indeed using Ports (and often portupgrade for upgrading with binaries). I am ...
vpetersson's user avatar
18 votes
5 answers
44k views

Dovecot user lookup fails when using username@domain format

I have Dovecot v2.0.11 installed on a FreeBSD server and the user lookups for incoming email addresses are failing, but lookups for system users is successful. Dovecot is setup to use system users, ...
cigarman's user avatar
  • 283
18 votes
3 answers
21k views

How can I scroll back the output in FreeBSD's console without Scroll Lock?

I've installed FreeBSD inside a VM on a laptop. As it turns out, the laptop keyboard has no Scroll Lock key, which is used for scrolling the screen back in FreeBSD's console. How can I scroll back the ...
Eugene Yarmash's user avatar
16 votes
3 answers
4k views

Log every command executed from root

I want to give access to my root server to an external system administrator, but i want to be sure to double check what he is doing to my server, e.g. copying data i don't want them to do and so on. I ...
cedivad's user avatar
  • 700
16 votes
5 answers
29k views

Can I change a user password in Linux from the command line with no interactivity?

I have a specific use case where I would really like to be able to change a user's password with a single command with no interactivity. This is being done in a safe fashion (over SSH, and on a system ...
Paul Hoffman's user avatar
  • 2,274
16 votes
4 answers
29k views

Possible to disable "You have new mail in /var/mail/root"?

I would like to disable the mailcheck in FreeBSD 9.1. My login shell is BASH, so I have tried to add unset MAILCHECK in /root/.bashrc and /root/.profile, but I still get those messages. Question ...
Sandra's user avatar
  • 10.6k
15 votes
7 answers
69k views

How to Find a file in FreeBSD

I'm trying to locate all copies of example.filename on my FreeBSD server. What's the best / easiest / most efficient way to do this?
Ian's user avatar
  • 1,528
15 votes
1 answer
5k views

FREENAS: Why isn't mv command instant within a RAIDZ1 volume?

I'm currently 'reorganizing' file structure within a RAIDZ1 volume. Moving directories from one dataset to another, which are both contained on the same volume. SSH'ed into the machine and did a ...
Ryan's user avatar
  • 282
14 votes
5 answers
32k views

linux : netstat listening queue length

Is there a way to view queue length on listening socket under Linux, the same way as netstat -L outputs for FreeBSD? I.e. you can see X/Y/Z in netstat -L output, but netstat under Linux doesn't ...
Artem G's user avatar
  • 381
14 votes
7 answers
63k views

ZFS import unable to find any pools

I had a ZFS pool -- a mirror containing 2 vdevs -- running on a FreeBSD server. I now have only one of the disks from the mirror, and I am trying to recover files from it. The ZFS data sits in a GPT ...
squidpickles's user avatar
14 votes
1 answer
24k views

How can I start a shell inside a jail on FreeBSD?

I have access to a a previously set up FreeBSD box with a number of jails on it. One of the jails is an SQL server, and does not have ssh enabled on it. How can I gain access to a shell on that jail ...
Redconnection's user avatar
14 votes
4 answers
2k views

Why does slice C or slice 2 cover the entire disk

Something that I was discussing with a couple of friends and we were unable to figure it out. In FreeBSD and OpenSolaris/Solaris when you partition a drive a partition is created that covers the whole ...
X-Istence's user avatar
  • 762
13 votes
3 answers
2k views

Bare metal or virtualize?

I am looking to upgrade servers and am trying to figure out a good plan. We currently have 4 servers: OpenBSD firewall/VPN server FreeNAS backup servers (local) that receives ZFS snapshots FreeNAS ...
Scott78's user avatar
  • 133
13 votes
6 answers
5k views

OpenBSD, FreeBSD: your update philosophy?

I've used FreeBSD for about 5 years - server/Desktop - and I've tended to take my apt-get/yum upgrade everything habits along with me ( I admin Debian/RHEL/Cent boxes as well -- I know, I know ......
Bubnoff's user avatar
  • 425
13 votes
1 answer
13k views

How do I disable hard disk spin down or head parking in FreeBSD?

I have built a new FreeBSD file server with multiple HDDs. I found whenever the disks are not accessed for a while, the disks would spin down completely or park its head. How do I disable HDD spin ...
比尔盖子's user avatar
13 votes
5 answers
2k views

Freebsd change default Internet channel route

I have two Internet channel and Gateway on freebsd. When I switch channel with the command route change default chan2, the command netstat -nr shows changed default route. But traceroute shows that ...
Taron's user avatar
  • 131
12 votes
23 answers
28k views

Best practices to block social sites

In our company we have around 100 workstations with Internet access, and the day-to-day situation is getting worse and worse from the perspective of using Internet access for the purpose of doing ...
12 votes
2 answers
20k views

Need to replace disk in zpool ... confused

I need to replace a bad disk in a zpool on FreeNAS. zpool status shows pool: raid-5x3 state: ONLINE scrub: scrub completed after 15h52m with 0 errors on Sun Mar 30 13:52:46 2014 config: ...
d0g's user avatar
  • 989
12 votes
2 answers
13k views

BSD nc (netcat) does not terminate on EOF

Host A: tar cf - stuff | dd | nc -N -l 12987 Host B: nc a.example.com 12987 | dd | tar tf - On host A dd prints its summary after tar completes. Thus it is clear, that tar closes the pipe/file -...
georg's user avatar
  • 333
12 votes
7 answers
6k views

Cloud Providers that support FreeBSD? [closed]

NOTE: Even though I've accepted an answer for this, if you have a better one, please put it below. Thanks! I'm looking for recommendations from the wise and all-knowing Server Fault community on ...
Jed Daniels's user avatar
  • 7,402
12 votes
3 answers
26k views

NOQUEUE: reject: RCPT from on freebsd and postfix

I am building a server using this config -> http://www.purplehat.org/?page_id=4 and when trying to test basic email capabilities I get -> NOQUEUE: reject: RCPT from when try to send a test email. ...
mine's user avatar
  • 197
12 votes
0 answers
697 views

How much does FreeBSD accept_filter actually improve performance in a modern world?

I recently learned about FreeBSD's accept_filter socket option which can allow a worker process to avoid context switching by, for example, waiting until a full HTTP request is received with accf_http:...
Josh's user avatar
  • 9,248
11 votes
4 answers
9k views

Can I trust that ZFS is consistent between Linux and FreeBSD?

I'm planning to build a FreeNAS box sometime soon, but if ZFS on Linux eventually proves to be reliable, I might want to switch, just to have a more familiar OS. So I'm wondering if I can trust that ...
iconoclast's user avatar
  • 1,850
11 votes
5 answers
18k views

ZFS Sync over unreliable, slow WAN. ZFS replication, or rsync?

I've been tasked with making an off-site backup work over the WAN. Both storage boxes are FreeBSD based NAS boxes running ZFS. Once or twice a week, 15-60 gigs of photography data gets dumped to the ...
Paul McMillan's user avatar
11 votes
5 answers
18k views

FreeBSD Ports: How can I see all dependencies for a port, and all subdependencies for those dependencies?

I'm trying to build a port which depends on apache-ant. I thought I could run make build-depends-list to see all dependencies required by this port: # make build-depends-list /usr/ports/devel/apache-...
Stefan Lasiewski's user avatar
11 votes
4 answers
18k views

How to install python3.4-pip in FreeBSD 10.1?

I searched in the ports and can't find a pip installation package other than the pip for python27 py27-pip-6.1.1. Which way is the best for installing pip for python 3.x in FreeBSD 10.1? Or is it ...
Mr.Gosh's user avatar
  • 323
11 votes
2 answers
31k views

nginx php-fpm child exited with code 0

Anyone had a similar problem with php-fpm 7 with 11.0-RELEASE-p8 or know how to debug it? Situation starts after few minutes and show only half pages to clients. Any pages show up about ~62kb of ...
busy's user avatar
  • 291
11 votes
2 answers
13k views

Where are zfs settings written?

On FreeBSD 10.0, when one creates zfs partitions and configures where they are mounted (permissions, etc.), where is this information stored? /etc/fstab is largely empty. i.e.: $ zfs mount zpool0/...
ericx's user avatar
  • 446
11 votes
1 answer
4k views

Newsyslog wildcards - rotate all logs in a directory

I am running FreeBSD 8.1. I am trying to make newsyslog rotate logs defined by a dynamic path: # logfilename [owner:group] mode count size when flags [/pid_file] [sig_num] /path/logs/*....
Richard Knop's user avatar
  • 1,169
11 votes
3 answers
29k views

ZFS: How can I stop a zpool replace that's currently in progress?

A few days ago, I noticed that the ZFS pool on my home server had started reslivering a disk by itself but was no longer making any progress. The disk had some SMART errors (but did not consider ...
Kaypro II's user avatar
  • 322
11 votes
5 answers
10k views

FreeBSD jails vs virtualization performance

I'll soon buy myself a nice server (something like the quad-cpu HP DL585) for personal use (home related stuff, data-mining projects, web server and some cron jobs), and I wonder how to separate all ...
Berzemus's user avatar
  • 1,192

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