Learning Unix By Access This Public Free Unix Server (Running Since 1987)

Mr李 • 2023-04-30 15:02 • 好物分享

Super Dimension Fortress (SDF, also known as freeshell.org) is a non-profit public access UNIX shell provider on the Internet. It has been in continual operation since 1987 as a non-profit social club.

SDF provides free Unix shell access, web hosting and many other features at the user membership level. Additional programs, capabilities and resources are available at "patron" and "sustaining" level memberships, which are granted with one-time or recurring dues in support of the SDF system.

The SDF network of systems that serves its membership currently includes NetBSD servers for regular use (running on DEC Alpha- and AMD Opteron-powered hardware) as well as retrocomputing environments: a TWENEX system running the Panda Distribution TOPS-20 MONITOR 7.1 on two XKL TOAD-2 computers,[2][3] a Symbolics Genera system, and an ITS system[4] .

- above information is from Wikipedia.

Websites

https://sdf.org/ - SDF Public Access UNIX System .. Est. 1987
http://freeshell.de - Public access Linux system. Your non-profit shell provider since 2002.

Online Access Server through Gate One Web SSH Client

https://ssh.sdf.org:4443/

Register an account

https://sdf.org/

Log In

After registered an account, you will be able to use your own or online ssh client to log into it.

Here are some outputs after logged in.

┌──────────────────────────────────────────────────────────────────────┐
│ • MobaXterm Professional Edition v22.1 • │
│ (SSH client, X server and network tools) │
│ │
│ ⮞ SSH session to [email protected] │
│ • Direct SSH : ✓ │
│ • SSH compression : ✓ │
│ • SSH-browser : ✓ │
│ • X11-forwarding : ✗ (disabled or not supported by server) │
│ │
│ ⮞ For more info, ctrl+click on help or visit our website. │
└──────────────────────────────────────────────────────────────────────┘
[ 'jy' will expire in 365 days - Please 'validate' your account soon ]
Please press your BACKSPACE key:
=======================================================================
SDF host uptime report for Seattle WA, Dallas TX (USA) and Germany (EU)
Please use 'tty.sdf.org' for general access
=======================================================================
SERVER DAYS+HOUR:MIN USERS MACHINE LOAD
----------------------------------------------------------------------
9p up 26+21:54, 16 users, load: 0.00, 0.00, 0.00
aNONradio up 134+6:00, 24 users, load: 0.16, 0.17, 0.15
beastie up 42+12:10, 18 users, load: 0.00, 0.01, 0.00
faeroes up 134+00:12, 69 user, load: 0.20, 0.24, 0.24
iceland up 134+00:04, 51 users, load: 0.26, 0.28, 0.27
jitsi up 32+22:55, 4 users, load: 0.00, 0.00, 0.00
ma up 63+16:14, 85 users, load: 3.91, 3.54, 3.53
mastodon up 139+21:33, 862 users, load: 1.85, 1.92, 2.06
matrix up 11+22:07, 227 users, load: 0.70, 0.41, 0.51
mc up 63+16:20, 2 users, load: 3.46, 3.50, 3.52
miku up 108+23:07, 3 users, load: 3.85, 3.63, 3.66
mx up 120+21:09, 334 users, load: 1.98, 1.79, 1.47
norge up 42+12:19, 85 users, load: 0.09, 0.08, 0.08
otaku up 134+00:00, 42 users, load: 0.31, 0.21, 0.22
rie up 133+23:57, 202 user, load: 0.52, 0.57, 0.57
sdf up 20+18:57, 137 users, load: 0.63, 0.67, 0.80
sdfeu up 98+11:21, 133 users, load: 2.69, 2.60, 2.58
sverige up 42+12:21, 26 users, load: 0.09, 0.11, 0.08
vps3 up 221+1:45, 20 users, load: 3.70, 2.11, 1.38
vps9 up 81+16:46, 9 users, load: 0.00, 0.00, 0.00
2349 total
(continue)
The Moon is Waning Gibbous (78% of Full)
.----------
.--' o . .
.-' . O .
.-'@ @@@@@@@ . @@@@@
/@@@ @@@@@@@@@@@ @@@@@@@
./ o @@@@@@@@@@@ @@@@@@@
/@@ o @@@@@@@@@@@. @@@@@@@
/@@@@ . @@@@@@@o @@@@@@@@@@
|@@@@@ . @@@@@@@@@@@
/@@@@@ O `.-./ . @@@@@@@@@@@ Full Moon +
| @@@@ --`-' o @@@@@@@@ 4 18:23:38
|@ @@@ ` o . @@ . Last Quarter -
| @@ @ .-. @@@ 3 1:57:43
/ . @ @@@ `-' . @@@@
| @@ @@@@@ . @@
/ @@@@ @/@@ / . O .
/ o @@ / / / .
`/ . ./.-.___ . .
/ `-'
`-. o / | o O
`-. / . .
`--. .
`----------
(continue)
[09-Sep-22 17:47:51 abortretryfail abortretryfail EL87]
% Greetings from the Mac Color Classic. 🙂
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
[12-Sep-22 00:25:04 slothrop mobb_solo N. Loop Austin]
% Live Music @ Monkeywrench Booksellers 8pm ▒🧨
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
[18-Sep-22 05:05:57 qiqi Kusanalika Xamarin (initial) ]
% Thanks for this. Well I use Indonesia main language using script and not all use Indonesia main language. Memang agak sulit untuk menerjemahkan.
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
[23-Sep-22 11:20:54 claudiom claudiom work]
% Happy Friday from UTC-4!
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
[23-Sep-22 14:58:35 charmquark charmquark Earth]
% Running my own unix server... nevermore?
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
[27-Sep-22 14:40:26 unixen Unixen The last Frontier]
% Wish I had found this a long time ago, but glad I am here now
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
[02-Oct-22 21:30:21 billybigbagels Billy Los Angeles, CA]
% It was a fun ride Overwatch 1, you will be missed...
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
[03-Oct-22 14:21:07 skylar skylar ]
% command line!
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
[03-Oct-22 17:29:55 isk isk Los Angeles]
% The trap appears to be disarmed.
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
[06-Oct-22 05:03:22 geoffo Geoff Oliver Colorado Springs, CO]
% Very cool stuff!!!
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
[07-Oct-22 08:48:31 devhackvps devhackvps The End Of Space]
% lol free email address + free computer
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
[09-Oct-22 04:09:32 burgertron cheesy server 'closet']
% got a server with a buttload of ram, getting freebsd going with samba and doing apple mdm stuff, may write something
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
[09-Oct-22 09:13:02 tusharhero tusharhero India]
% Hello I am under water here too much raininig 😭
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
[09-Oct-22 14:00:29 tusharhero Depressed JEE aspirant India]
% I have been trying to complete my homeowrk for 6 hours now
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
[09-Oct-22 14:20:54 railey ree Internet]
% what's the meaning of life?
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
[10-Oct-22 13:48:30 abortretryfail AbortRetryFail EL87]
% What is love? Baby don't hurt me... Don't hurt me, no more.
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
[13-Oct-22 14:17:24 cberce Chris Zurich, Switzerland]
% gruezi mitanand 🙂
7304 guestbook entries.
Type 'help' for Commands.
Type 'com' to chat with other users.
Type 'ttytter' to listen to Twitter Tweets anonymously.
Type 'mud' to play the SDFmud.
Type 'mkhomepg' to set up your personal website.
Did you know you can become a permanent LIFETIME member of SDF
by making a onetime donation of $36? Type 'arpa' for more info!
faeroes:/sdf/udd/j/jon>

Commands

You can easily use help command to get the list for all available commands:

faeroes:/sdf/udd/j/jo> help SDF psh Version 8 - *PREVALIDATED SHELL ACCOUNT* what - what can I use this account for? unix - a listing of UNIX commands available to you NOW how - information on increasing membership teach - using SDF in a classroom setting dialup - information about SDF dialup service arpa - about lifetime arpa membership bboard - sdf user message boards commode - chat with other users online ysm - chat on the ICQ network bsflite - chat on the AIM network msnre - chat on the MSN network ttytter - listen to Twitter tweets anonymously lynx - browse the WWW textually or access GOPHER bksp - set your BACKSPACE key software - display software programs installed on the system quote - get a real time stock quote games - a listing of available games thxmoo - connect to the THXMOO mud - connect to the SDFmud validate - gain additional shell access (also try 'user' for details) faeroes:/sdf/udd/j/jo>

faeroes:/sdf/udd/j/jo> unix UNIX command summary cd {dir} - Change Directory pwd - print working (current) directory ls - LiSt directory (try ls -la) cat {file} - conCATenate (view) a file mkdir {name} - create a directory rm {file} - remove a file or directory mv {file) - move a file or directory chmod perm {file} - set permission bits for a file or directory edit {file} - edit a file in your directory ps - Process Status (try ps -aux) passwd - Change your password disk - show current disk usage uptime - show system status df - print system storage freeirc - IRC access is free on Sundays profiles - Join the ASCII social network dict {word} - query the online dictionary cal - calendar (try 'cal 1752') finger {user} - show info about a user (try who or w) chfn - change your full name chsh - change your shell ping {host} - test network connectivity to a host traceroute {host} - view the route to a remote host man {cmd} - read a manual page for a command. dig / host - DNS utilities geoip - Country lookup on an IP expire - calculate your account expiration domains - list domains available for use on SDF mkhomepg - manage your own webpage space mkgopher - manage your own gopherspace upload - upload a file using ZMODEM (works w/ TeraTERM) com - multiuser online chat msg {user} - send a message to another user online bboard - bulletin board faq - frequently asked questions mail - read/send email (also try http://webmail.freeshell.org) lynx {url} - browse webpages links {url} - browse webpages (w/ frames support) gopher {url} - browse gopherspace talk {user} - talk to another user url {user} - look up a user's URL ysm - chat on the ICQ network pkg_info - list ported/installed software packages whois {domain} - query the INTERNIC WHOIS database logout - logoff

faeroes:/sdf/udd/j/jo> df -h Filesystem Size Used Avail %Cap Mounted on /dev/wd0a 35G 1.9G 32G 5% / nol1:/sdf 23T 6.5T 16T 29% /sdf ptyfs 1.0K 1.0K 0B 100% /dev/pts faeroes:/sdf/udd/j/jo>

Change Password

faeroes:/sdf/udd/j/jo> passwd Trying 10.0.0.22... Connected to nol1. Escape character is 'off'. NetBSD/amd64 (mx) (pts/3) login: SDF ACCOUNT MAINTENANCE INTERFACE - (use 'tty.sdf.org' for LOGIN access) p - change your password s - change your shell f - configure your PUBLIC FINGER display (finger [email protected]) g - configure your NON-PUBLIC GECOS field (Fullname, Office, Phone ..) a - setup automatic password recovery e - an external contact email address for dues and system notices o - manage optional account features and social networking m - reset your MySQL password(s) w - reset webmail preferences v - set or reset your VoIP SIP id q - quit (main) Your Choice: Changing local password for jon. Old password: New password: Retype new password: % Successful - NOTE! THE CLIENTS WILL UP DATE SHORTLY. BE PATIENT AND ALLOW THE UPDATE TO OCCUR. (continue)

There are lots of limitation for free user to use those features or fuctions, such as change your shell. If you are trying to do that, it will require you validate your account first. Validate basically means a minimum donation, $1 USD by mail or $3 USD by Paypal.

Resources

EN: https://docs.freebsd.org/doc/

CN: https://book.freebsdcn.org/

Videos

References

SDF Public Access Unix System Wikipedia page

版权声明：
作者：Mr李
链接：https://www.techfm.club/p/44824.html
来源：TechFM
文章版权归作者所有，未经允许请勿转载。

THE END

二维码

现在围起来到时围起来（20230408）

< <上一篇

UFOVPS五一优惠：全场7.9折，可叠加充值返现活动，香港/美国/日本机房

下一篇>>

搜索内容