Readings, Assignments, Labs, and ToDoIndex
- Read (at least) these things (All The Words):
- Using your lynda.com account, watch Unix for Mac OS X Users
- 1. Intro to Unix
- Command structure 5m 22s
- command names, options, and arguments
- Kernels and shells 5m 25s
- the O/S core vs. the shell programs that read your command line
- Unix manual pages 4m 6s
man- how to get help on every Unix/Linux command name
- “the most valuable movie”, “your best friend”
- 2. Filesystem Basics
- The working directory 2m 49s
- Listing files and directories 3m 59s
- Moving around the filesystem 4m 58s
cd, TAB filename completion, absolute/relative paths
- Filesystem organization 4m 12s
- ROOT, standard Unix folders
- 3. Working with Files and Directories
- Naming files 5m 41s
- Unix is case-sensitive, OSX is case-insensitive!
- avoid special characters or blanks in Unix pathnames
Assignments this weekIndex
Check the due date for each assignment and put a reminder in your agenda, calendar, and digital assistant.
- Read (All The Words), Do, and then Submit via Blackboard:
Errors in submitted assignment01.txtIndex
As of noon today (Sunday September 15), 11 students have not Read All The Words in Assignment 1 and will not be getting marks tomorrow:
Bad file name: part 2.txt
Bad file name: assignment 01.txt
Bad file name: CST8207 Assignment 01 Xxxxxxx.txt
Bad file name: Assignment01.txt
Bad file name: assignment01XxxxxXxxxxxxx.txt
Assignment uploaded without file attachment
Bad file name: assignment01.txt.txt
Text found in Blackboard comments box (ignored)
Bad file name: assignment 01.txt
Bad file name: assignment01.txt.txt
Bad file name: Assignment01.txt
Go to your assignment upload area and check your file name!
Real Sysadmin WorkIndex
People in China, California try to log in as root on the CLS:
Sep 9 22:58:31 Failed password for root from 117.79.148.54 port 43791 ssh2
Sep 10 13:30:16 refused connect from 117.79.148.54 117.79.148.54)
$ whois 117.79.148.54
descr: Beijing Sanxin Shidai Co.Ltd
descr: 1513 Xinjishu building Beijing link west road
descr: Haidian District, Beijing, PRC
country: CN
Sep 10 01:37:34 Failed password for root from 198.13.117.194 port 46897 ssh2
Sep 10 01:37:35 refused connect from 198.13.117.194 (198.13.117.194)
$ whois 198.13.117.194
OrgName: Psychz Networks
OrgId: PS-184
Address: 20687-2 Amar Road #312
City: Walnut
StateProv: CA
Sep 11 04:56:15 Failed password for root from 59.55.141.104 port 2396 ssh2
Sep 11 04:56:26 Failed password for root from 59.55.141.104 port 2766 ssh2
Sep 11 04:56:33 refused connect from 59.55.141.104 (59.55.141.104)
$ whois 59.55.141.104
descr: CHINANET Jiangxi province network
descr: China Telecom
descr: No.31,jingrong street
descr: Beijing 100032
country: CN
Someone in Ohio tries probing account names:
Sep 10 10:05:17 Invalid user aditza from 66.84.25.6
Sep 10 10:05:18 Failed password for invalid user aditza from 66.84.25.66 port 55317 ssh2
Sep 10 10:05:19 Invalid user admin1 from 66.84.25.6
Sep 10 10:05:21 Failed password for invalid user admin1 from 66.84.25.66 port 56315 ssh2
Sep 10 10:05:22 Invalid user admin from 66.84.25.66
Sep 10 10:05:24 Failed password for invalid user admin from 66.84.25.66 port 57605 ssh2
Sep 10 10:05:25 Invalid user admin from 66.84.25.66
Sep 10 10:05:27 Failed password for invalid user admin from 66.84.25.66 port 58969 ssh2
Sep 10 10:05:27 Invalid user ale from 66.84.25.66
Sep 10 10:05:30 Failed password for invalid user ale from 66.84.25.66 port 59986 ssh2
Sep 10 10:05:30 Invalid user alex from 66.84.25.66
Sep 10 10:05:33 Failed password for invalid user alex from 66.84.25.66 port 33066 ssh2
Sep 10 10:05:33 Invalid user alex from 66.84.25.66
Sep 10 10:05:35 Failed password for invalid user alex from 66.84.25.66 port 34321 ssh2
Sep 10 10:05:36 Invalid user Alin from 66.84.25.66
Sep 10 10:05:37 Failed password for invalid user Alin from 66.84.25.66 port 35553 ssh2
Sep 10 10:05:38 refused connect from s66.n25.n84.n66.static.myhostcenter.com (66.84.25.66)
$ whois 66.84.25.6
OrgName: Jumpline Inc
Address: 5000 ARLINGTON CENTRE BLVD
City: Upper Arlington
StateProv: OH
Attackers in China probe account names:
Sep 10 15:57:21 Failed password for root from 221.6.96.177 port 56455 ssh2
Sep 10 15:57:26 Failed password for root from 221.6.96.177 port 57756 ssh2
Sep 10 15:57:31 Failed password for root from 221.6.96.177 port 59015 ssh2
Sep 10 15:57:35 Failed password for invalid user db2inst1 from 221.6.96.177 port 60362 ssh2
Sep 10 15:57:39 Failed password for root from 221.6.96.177 port 33334 ssh2
Sep 10 15:57:44 Failed password for invalid user prueba from 221.6.96.177 port 34543 ssh2
Sep 10 15:57:48 Failed password for bin from 221.6.96.177 port 35865 ssh2
Sep 10 15:57:49 refused connect from ns3.itgle.com (221.6.96.177)
$ whois 221.6.96.177
address: No. 65 Beijing West Road,Nanjing,China
Sep 11 02:26:39 Failed password for root from 202.104.147.26 port 28629 ssh2
Sep 11 02:27:02 Failed password for root from 202.104.147.26 port 21095 ssh2
Sep 11 02:27:05 Failed password for root from 202.104.147.26 port 21095 ssh2
Sep 11 02:27:07 Failed password for root from 202.104.147.26 port 21095 ssh2
Sep 11 02:27:24 Failed password for root from 202.104.147.26 port 22920 ssh2
Sep 11 02:27:36 refused connect from 202.104.147.26 (202.104.147.26)
Sep 11 02:27:47 refused connect from 202.104.147.26 (202.104.147.26)
Sep 11 02:27:59 refused connect from 202.104.147.26 (202.104.147.26)
$ whois 202.104.147.26
person: LI XINKAIG
address: F9,HONGBO MANSION,HONGHUYI STREET,SHENZHEN
country: CN
Someone in California probes account names:
Sep 10 23:57:41 Failed password for root from 216.99.159.114 port 53777 ssh2
Sep 10 23:57:44 Failed password for invalid user app from 216.99.159.114 port 54881 ssh2
Sep 10 23:57:46 Failed password for invalid user avouni from 216.99.159.114 port 55935 ssh2
Sep 10 23:57:49 Failed password for invalid user berila from 216.99.159.114 port 56930 ssh2
Sep 10 23:57:52 Failed password for bin from 216.99.159.114 port 58210 ssh2
Sep 10 23:57:55 Failed password for bin from 216.99.159.114 port 59461 ssh2
Sep 10 23:57:58 Failed password for bin from 216.99.159.114 port 60597 ssh2
Sep 10 23:58:02 Failed password for bin from 216.99.159.114 port 61815 ssh2
Sep 10 23:58:05 Failed password for bin from 216.99.159.114 port 63057 ssh2
Sep 10 23:58:07 Failed password for bin from 216.99.159.114 port 64347 ssh2
Sep 10 23:58:11 Failed password for bin from 216.99.159.114 port 40226 ssh2
Sep 10 23:58:11 refused connect from 216.99.159.114 (216.99.159.114)
$ whois 216.99.159.114
OrgName: Psychz Networks
Address: 20687-2 Amar Road #312
City: Walnut
StateProv: CA
Some crackers in Columbia and Hong Kong try to fetch account files from my machine using long strings of parent directories (..) in Web URLs:
2013-04-28_03:08:36 190.90.185.241 "GET /help/index.php?screen=../../../../../../../../etc/voipnow/voipnow.conf HTTP/1.1" 404 243 "-" "HTTP_Request2/2.1.1 (http://pear.php.net/package/http_request2) PHP/5.1.6" 332 451 "/var/www/html/help"
2013-02-18_20:46:30 223.255.179.115 "GET /?-d%20allow_url_include%3DOn+-d%20auto_prepend_file%3D../../../../../../../../../../../../etc/passwd%00%20-n/?-d%20allow_url_include%3DOn+-d%20auto_prepend_file%3D../../../../../../../../../../../../etc/passwd%00%20-n HTTP/1.1" 200 541 "-" "curl/7.19.4 (i386-redhat-linux-gnu) libcurl/7.19.4 NSS/3.12.2.0 zlib/1.2.3 libidn/0.6.14 libssh2/0.18" 385 826 "/var/www/html/index.html"
$ whois 192.168.9.250
owner: Flywan S.A.
address: 000 - Medellin - CO
country: CO
$ whois 223.255.179.115
descr: Wharf T&T Limited
descr: Kwun Tong, Kowloon
country: HK
Author:
| Ian! D. Allen - idallen@idallen.ca - Ottawa, Ontario, Canada
| Home Page: http://idallen.com/ Contact Improv: http://contactimprov.ca/
| College professor (Free/Libre GNU+Linux) at: http://teaching.idallen.com/
| Defend digital freedom: http://eff.org/ and have fun: http://fools.ca/
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