Linux 3 - Midterm 2
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| URI | Uniform Resource Identifier. Specifies protocol used to retrieve web resource, server's host name (opt. port #), and the resource name.
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| URL Request | Web server responds to URL requests by mapping URI to resource location in local repository.
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| Browser | REQUESTS web resource, INTERPRETS file format content and DISPLAYS file content.
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| Port #s | 20/21-ftp; 22-SSH; 23-Telnet; 25/587-SMTP; 53-dns; 80-http; POP-110; IMAP-143
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| Common HTTP start-line methods: | GET, HEAD, POST
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| In named.conf for a slave zone, what directives do we need? | type slave; masters {172.16.30.#;}; file "slaves/zone.file";
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| In named.conf for a master zone, what directives do we need for slave to work? | type master; allow-transfer {172.16.31.#;};
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| What command is used to start/stop Apache? | apachectl (start|stop)
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| What command is used to display Apache status? | apachectl fullstatus
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| What command is used to run Apache file syntax test? | apachectl configtest
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| Apache: what is the directive that specifies the directory which per-user content is located? | UserDir
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| Apache is a modular program, so they can be added to extend functionality. How do you list currently loaded modules? | httpd -l
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| What is the Apache config file? | .../apache/conf/httpd.conf
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| Apache: DocumentRoot | directory that forms the main document tree visible from the web
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| How does a server host web sites for more than one hostname? | Virtual Hosting
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| What are the types of virtual hosting? | IP, Name, and Port
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| What are the directives required in the VirtualHost container directive? | ServerName(www.example99.lab); DocumentRoot; ErrorLog; AccessLog;
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| What is named based virtual hosting? | 2+ VirtualHost on the same IP address
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| What is IP based virtual hosting? | 2+ VirtualHost on seperate IP address
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| What is the default mail log file? | /var/log/maillog
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| What is the command to view mail queue? | mailq
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| Example of MX record: | example.lab. MX 10(priority) mail.example.lab
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| Sendmail: How do you get client to use the DNS server of the receiving mail system | edit resolv.conf
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| MUA | Mail User Agent: compose, inject, retrieve
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| MTA | Mail Transfer Agent: queue, DNS lookup, route
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| MDA | Mail Delivery Agent: place mail into local recipient's mailbox
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| MAA | Mail Access Agent: connect user agent to server message store
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| MSA(optional) | Mail Submission Agent: takes message from MUA, makes it compliant to some standards, passes it to MTA.
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| Example mail message flow: | MUA > MTA > MTA > MDA < MUA; MUA > MSA > MTA > MTA > MTA > MDA < MAA < MUA
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| E-mail structure: SMTP header = Envelope | Return Path = ES (Envelope Sender), Destination = ER (Envelope Receiver)
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| E-mail structure: SMTP body = message header + body | Header = From(HS), To(HR), CC, Date, Subject; Body = message
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| Mailbox Address Rewriting: Inbound | Email alias (complaints@job.com >> /dev/null), Virtual Users (person@place.hi >> sameperson@differentplace.by)
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| Mailbox Address Rewriting: Outbound | Masquerading (guy@host.domain.com >> guy@domain.com) Generics (devil@hell.heaven.tv >> angel@heaven.tv)
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| Sendmail configs: | sendmail.cf (actual config but super confusing), sendmail.mc (readable config we use which gets turned into sendmail.cf)
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| How to accept mail from other MTAs | DAEMON_OPTIONS (`Port=smtp, Name=MTA’)
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| What do you put into /etc/local-host-names | host name or domain name for which mail server is hosting mail. (example#.lab)
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| Directive used to masquerade | MASQUERADE_AS( `example#.lab' )
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| Samba: Set up public share | [public]; path; public = yes
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| Samba: Set up homes share | [homes]; writable = yes
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| Samba config file | /etc/samba/smb.conf
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| Samba: user access | [global]; security = user
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| Create a samba user | smbpasswd -a user8213
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| List samba users stored in tdbsam | pbdedit -L
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| Samba: Windows host access | no need to install software, net use z: \\server\share
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| Samba protocol | pre-Active Directory: CIFS application over NetBIOS session layer over TCP/IP; AD: CIFS application over TCP/IP
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