Shared Flashcard Set

Details

Linux Commands and Features
This is a list of linux commands, as well as relevent programs and information.
95
Computer Networking
Not Applicable
04/24/2013

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Cards

Term
apt-get
Definition
Search for and install software packages, debian based.
Term
cat
Definition
Concatenate and print (display) the content of files
Term
cd
Definition
Change Directory
Term
chmod
Definition
Change access permissions
Term
chown
Definition
Change file owner and group
Term
clear
Definition
Clear terminal screen
Term
cp
Definition
Copy one or more files to another location
Term
cron
Definition
Daemon to execute scheduled commands
Term
crontab
Definition
Schedule a command to run at a later time
Term
date
Definition
Display or change the date & time
Term
df
Definition
Display free disk space
Term
dir
Definition
Briefly list directory contents
Term
du
Definition
Estimate file space usage
Term
echo
Definition
Display message on screen
Term
find
Definition
Search for files that meet a desired criteria
Term
free
Definition
Display memory usage
Term
grep
Definition
Search file(s) for lines that match a given pattern
Term
gzip
Definition
Compress or decompress named file(s)
Term
head
Definition
Output the first part of file(s)
Term
help
Definition
Display help for a built-in command
Term
history
Definition
List of previous commands
Term
ifconfig
Definition
Configure a network interface
Term
kill
Definition
Stop a process from running
Term
killall
Definition
Kill processes by name
Term
less
Definition
Display output one screen at a time
Term
ls
Definition
List information about file(s)
Term
man
Definition
Brings up the Help manual
Term
mkdir
Definition
Create new directories.
Term
more
Definition
similar to less, with less features
Term
ping
Definition
a packet of information sent over a network to test a network connection
Term
pwd
Definition
Print Working Directory
Term
rename
Definition
Rename files
Term
rm
Definition
Remove files
Term
rmdir
Definition
Remove directories
Term
screen
Definition
Runs terminal inside of terminal through ssh
Term
shutdown
Definition
Brings the system down.
Term
ssh
Definition
Secure Shell client used for remote login.
Term
su
Definition
Substitute user identity
Term
sudo
Definition
Execute a command as root, one time only
Term
tail
Definition
Lists the last parts of a file
Term
touch
Definition
Change time-stamp of or create a file.
Term
ulimit
Definition
Limit the allowed user resources.
Term
users
Definition
Lists users currently logged in.
Term
vi
Definition
Text editor
Term
watch
Definition
Execute/display a program periodically
Term
who
Definition
Print all usernames currently logged in
Term
whoami
Definition
Print the current user id and name
Term
wget
Definition
Downloads files while running in the background.
Term
yum
Definition
Search for and install software packages, red hat based.
Term
dmesg
Definition
Print kernel & driver messages
Term
exec
Definition
Execute a command
Term
egrep
Definition
Search a file for a pattern using full regular expressions.
Term
fdisk
Definition
Changes partitions
Term
ln
Definition
Create a symbolic link to a file
Term
lsof
Definition
List open files
Term
mount
Definition
Mount a file system
Term
mtr
Definition
Network diagnostics (traceroute/ping)
Term
rsync
Definition
Remote file copy
Term
uname
Definition
Shows the system information
Term
which
Definition
Lists the full path of a command.
Term
xargs
Definition
Execute utility, passing constructed argument list(s)
Term
LAMP stack
Definition
Linux, Apache, mySQL, Php. List of programs needed to run a server.
Term
DNS
Definition
Domain Name System; a system that uses nameserver to connect domains to IP addresses.
Term
Nameserver
Definition
Connects domain names to IP addresses.
Term
html
Definition
Hyper-Text Markup Link; scripting language of the internet
Term
php
Definition
Language used to scripting within html.
Term
mySQL
Definition
A database managing system for web servers.
Term
innoDB
Definition
A storage system for mySQL
Term
cPanel
Definition
A graphic interface for web hosting; control panel
Term
Plesk
Definition
Like cpanel, a graphical interface control panel for web hosting.
Term
Apache
Definition
A web server software program that delivers web content.
Term
Exim
Definition
A mail transfer agent used within unix.
Term
Dovecot
Definition
Open source Mail server
Term
Bind
Definition
DNS software
Term
Gmail
Definition
Mail client hosted through google
Term
Spam Assassin
Definition
Spam filtering software within apache
Term
Mod Sec
Definition
An apache module used to protect web applications from known and unknown attacks.
Term
SSL Certificate
Definition
A protocol for establishing a secure connection between a server and client.
Term
.htaccess
Definition
A configuration file that lists permissions on accessing certain directories.
Term
vhost
Definition
Virtual Hosting; Hosting multiple Domain names on a single IP address.
Term
wheel group
Definition
A special group of users that are allowed access to the su command.
Term
A record
Definition
An entry in the DNS zone file that maps a domain or subdomain to an IP address.
Term
TTL
Definition
Time to Live; a set of time given for a task to last.
Term
cname
Definition
An entry in the DNS zone file that a domain name is an alias for
Term
mx record
Definition
An entry in the DNS zone file that specifies a mail server attached to a domain.
Term
Port 21 is used by?
Definition
FTP; File Transfer Protocol
Term
Port 22 is used by?
Definition
SSH; Secure Shell
Term
Port 25 is used by?
Definition
SMTP; Simple Mail Transfer Protocol
Term
Port 53 and 54 is used by?
Definition
DNS; Domain Name System
Term
Port 80 is used by?
Definition
HTTPD; Hypertext Transfer Protocol Daemon
Term
Port 110 is used by?
Definition
POP3; Post Office Protocol
Term
Port 143 is used by?
Definition
IMAP; Internet Message Access Protocol
Term
Port 443 is used by?
Definition
SSL; Secure Sockets Layer
Term
Port 2082 and 2083 is used by?
Definition
cPanel
Term
Port 2086 and 2087 is used by?
Definition
WHM
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