Term
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Definition
| lets you configure your interface |
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Term
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Definition
| shows the status of network interfaces |
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Term
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Definition
| command to toggle interfaces on or off |
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Term
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Definition
| lets you see routing table or create static routes |
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Term
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Definition
| to replace ifconfig, but not very popular |
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Term
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Definition
| swiss army knife does a lot but poorly. Bad web browser, port scanner, used for simple file transfer. |
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Term
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Definition
| alone shows all connections to your machine, if netstat -r shows routing tambe, netstat -l shows info about your network adapter interface. |
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Term
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Definition
| runs in shell, protocol analyzer sniffer"text based monitors network and reports every packet thati sees. Like Wireshark. |
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Term
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Definition
| similar to TCPdump: diagnosis tool that lets you analyze data packets through a network interface. Like Wireshark. |
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Term
zone file record type
SOA |
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Definition
| Start of authority: defines the domain |
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Term
Zone file record types
NS |
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Definition
| Name server: Name of one of the DNS servers for this domain. |
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Term
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Definition
| Mail exchanger: name and priority of a mail server for this domain. |
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Term
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Definition
| Address: ip address of a computer. |
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Term
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Definition
| Pointer: Name of a computer. |
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Term
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Definition
| Canonical Name: alias name for a computer. |
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Term
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Definition
| Holds the address and hostname information within that domain. |
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Term
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Definition
| the way to zone file is distributed to the other servers. Uses a serial number at the top of the zone file, and Name servers compare it to decide when to update. |
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Term
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Definition
| shows who your names servers are, also adds the search path ".byui.edu" search path appended. addresses for names servers and search path. |
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Term
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Definition
| you tell Linux where it should go to resolve names, if it says [ files dns ] then it will go to local host file first, then to DNS, order matters. |
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Term
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Definition
| test your name servers replaced nslookup. |
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Term
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Definition
| test your name servers, replaced nslookup (it does not append the search path) |
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Term
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Definition
| test your name servers older less powerful one. |
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Term
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Definition
| if used to Linux to Linux machines, allows you to mount a remote file system into any directory tree. |
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Term
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Definition
| where you create permanent export directories used by NFS. export is like sharing on the network. |
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Term
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Definition
| cna mount from fstab/home/marko and mount it. |
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Term
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Definition
| lets you find out which usres have a file open. |
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Term
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Definition
| Linux to windows machines. |
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Term
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Definition
| common internet file system: lets netbios run on top of tcpip. |
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Term
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Definition
| Server message block: portocol that lets linux communicate with windows like mapping network drives [NetBIOS//server/share] |
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Term
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Definition
| does a syntax check on /etc/samba/smb.conf |
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Term
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Definition
| displays registered names of a host. |
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Term
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Definition
| lets you connect linux client to the windows server. |
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Term
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Definition
| lists currently existing connections to the samba server. |
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Term
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Definition
| http://localhost:631[[[PORT 631]]]: Print server. |
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Term
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Definition
| Postscript printer definition, postscript = open standard for printing files. |
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Term
printing commands
lpadmin |
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Definition
| create printers from the cmd prompt |
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Term
printing commands
lpoptions |
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Definition
| to change properties of a printer |
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Term
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Definition
| to print something lp will print also |
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Term
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Definition
| or lp stat view the print queue |
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Term
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Definition
| remove a job or use [cancel] |
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Term
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Definition
| Network information services, do domain wide authentication services, replicated critical files only works on Linux and Unix. Originally called Yellow Pages (YP) |
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Term
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Definition
| NIS but works on everything, compatible with windows active directory. |
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Term
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Definition
| canonical name: user name printer file or directory. (lowest level name) |
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Term
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Definition
| organizational unit: group users together into an organization (enginerring, IT, finance) |
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Term
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Definition
| domain component: where you specify your domain, all orgs belong to BYUI --- requires two components dc=ybyui, dc=edu. |
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Term
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Definition
| Multi purpose Mail extension: way we can determine the type of a file, what kind of data and what should we use to open it. In windows we use an extension like .exe .txt. I node Mime flag to tell the OS what type it is. |
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Term
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Definition
| Simple mail transfer protocol: used to send mail, not to receive mail. |
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Term
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Definition
| Mail transfer agent, used to send the mail to its destination or destination server uses IMAP and POP. |
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Term
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Definition
| Mail delivery agent, compare the mail to a number of rules, and decide what to with it. so filters, Postfix and Sendmail. |
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Term
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Definition
| Mail user agent: your mail client. examples: Novell Evolution, KMail, Mozilla Thunderbird, Mutt(not gui), Pine (no gui), mail(no gui). |
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Term
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Definition
| once mail gets to the server it si distributed to the client with these. |
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Term
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Definition
| MDA newer easier to config and manage compadable with sendmail. |
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Term
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Definition
| MDA old an reliable and difficult to manage. |
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Term
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Definition
| setup file in /home/.procmailrc to configure soring options. |
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Term
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Definition
| super daemon: starts other daemons when they are needed. |
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Term
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Definition
| new and improved version of inetd. |
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Term
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Definition
| adds security to other less secure daemons, telnet daemon is insecure, so instead of rewriting, use tcp wrapper which wraps itself around it adding more security, uses host.allow and host.deny statements. |
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Term
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Definition
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Term
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Definition
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Term
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Definition
| Secure shell remote connections logins, that you can copy files using scp tunneling of other protocols within it (open tunnel between two hosts you can run less secure protocols) -x allows x server to run across this server. |
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Term
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Definition
| Dynamic Host Configuration Protocol: assigns a client a network/host address. Uses /etc.dhcpcd.conf and etc/sysconfig/dhcpcp. |
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Term
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Definition
| web server; home page is in /srv/www/htdocs. to start [rcapache2start] and stop [rcapache2stop]. |
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Term
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Definition
| which pages are currently in physical memory. |
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Term
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Definition
| number of pages in current memory. |
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Term
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Definition
| when you spend all time moving pages between physical and virtual memory and don't have any time to get real work done just moving everything. |
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Term
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Definition
| program and data references within a process tend to cluster. (even though I have a process that is this long, how much do i really need right now) |
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Term
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Definition
| take process and divide into fixed xize pages and divide memory into frames. |
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Term
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Definition
| physical bit, 0 (in physical memory) 1 (in virtual memory) |
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Term
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Definition
| modified bit, to know if we need to write something before you reuse the frame. if both aren't unmodified then replace the LRU file (least recently used) |
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Term
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Definition
| section fo the program that we need to protect with a semaphore, lock at beginning and unlock at the end. Instead just isolate the critical code. |
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Term
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Definition
| you have two processes concurrently and their contending with each other over some resoure, ex: create a boolean and set it true and other program sets it false, each changes truth value. |
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Term
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Definition
| if two processe are running at the same time running concurrently I get different results thatn if they were running separately. |
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Term
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Definition
| lock resources to a process to prevent deadlock, or any problems (check example with resources and queue) semwait and semsignal codes. |
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Term
conditions for deadlock
mutual exclusion |
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Definition
| only one process can do it at a time (printing, updating files) |
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Term
conditions for deadlock
hold-and-wait
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Definition
| if a process gets a resource it can hold it until it gets the one it needs. |
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Term
conditions for deadlock
no preemption |
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Definition
| resource cannot be removed from a process. |
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Term
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Definition
means you have a deadlock
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Term
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Definition
circles: processes
squares: resources
dots: how many instances of that resource exist.
arrow from process: request for the resource.
arrow from resource: resouce is held by that process.
make sure to watch directions fo arrows and number of dots. One extra dot can prevent a deadlock. |
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Term
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Definition
| how to write scripts, remember the whole shebang #!/bin/bash and in perl it is #!/usr/bin/perl. |
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Term
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Definition
| parameters get sored in $1 $2 |
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Term
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Definition
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Term
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Definition
lexicographical, compares the first character
if put inside a (()) then it interprets it as numberical. |
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