Dibawah ini ada beberapa perintah linux dan fungsinya,

awk����>Find and Replace text, database sort/validate/index
bzip2���> Compress or decompress named file(s)

cal����->Display a calendar
cat����->Display the contents of a file
cd�����>Change Directory
chgrp���>Change group ownership
chmod��->Change access permissions
chown���>Change file owner and group
chroot���>Run a command with a different root directory
cksum���>Print CRC checksum and byte counts
clear����>Clear terminal screen
cmp����>Compare two files
comm���>Compare two sorted files line by line
command�->Run a command � ignoring shell functions
cp�����>Copy one or more files to another location
cron����>Daemon to execute scheduled commands
crontab��->Schedule a command to run at a later time
csplit���->Split a file into context-determined pieces
cut ����->Divide a file into several parts

date����>Display or change the date & time
df�����>Display free disk space
diff����->Display the differences between two files
diff3����>Show differences among three files
dig ����->DNS lookup
dir�����>Briefly list directory contents
dircolors��> Colour setup for `ls�
dirname��>Convert a full pathname to just a path
dirs����->Display list of remembered directories
du�����>Estimate file space usage

echo����>Display message on screen
egrep����>Search file(s) for lines that match an extended expression
eject����>Eject removable media
enable���>Enable and disable builtin shell commands
env����->Environment variables
ethtool���>Ethernet card settings
eval����->Evaluate several commands/arguments
exec����>Execute a command
exit����->Exit the shell
expand���>Convert tabs to spaces
export���>Set an environment variable

fdformat��>Low-level format a floppy disk
fdisk����>Partition table manipulator for Linux
fgrep����>Search file(s) for lines that match a fixed string
file�����>Determine file type
find����->Search for files that meet a desired criteria
fold����->Wrap text to fit a specified width.
format���>Format disks or tapes
free����->Display memory usage
fsck����->File system consistency check and repair
ftp�����>File Transfer Protocol

gawk����>Find and Replace text within file(s)
getopts���>Parse positional parameters
grep����>Search file(s) for lines that match a given pattern
groups���>Print group names a user is in
gzip����>Compress or decompress named file(s)

head����>Output the first part of file(s)
history��->Command History
hostname�>Print or set system name

id�����>Print user and group id�s
ifconfig ��>Configure a network interface
install���>Copy files and set attributes

join����>Join lines on a common field

kill����->Stop a process from running

less����>Display output one screen at a time
ln�����>Make links between files
locate���>Find files
logname��>Print current login name
logout���>Exit a login shell
look����>Display lines beginning with a given string
lpc����->Line printer control program
ls�����>List information about file(s)
lsof����>List open files

make���>Recompile a group of programs
man����>Help manual
mkdir���>Create new folder(s)
mkfifo���>Make FIFOs (named pipes)
mkisofs��>Create an hybrid ISO9660/JOLIET/HFS filesystem
mknod��->Make block or character special files
more���->Display output one screen at a time
mount���>Mount a file system
mtools��->Manipulate MS-DOS files
mv����>Move or rename files or directories

nano���->Text editor
netstat��->Networking information
nice����>Set the priority of a command or job
nohup���>Run a command immune to hangups
nslookup �>Query Internet name servers interactively

passwd��->Modify a user password
pathchk��>Check file name portability
ping���->Test a network connection
popd���>Restore the previous value of the current directory
ps����->Process status
pushd��->Save and then change the current directory
pwd���->Print Working Directory

quota���>Display disk usage and limits
quotacheck ->Scan a file system for disk usage
quotactl�-> Set disk quotas

ram����>ram disk device
rcp����>Copy files between two machines.
read����>read a line from standard input
readonly�-> Mark variables/functions as readonly
remsync�->Synchronize remote files via email
rm����->Remove files
rmdir��� >Remove folder(s)
rsync���>Remote file copy (Synchronize file trees)

scp����>Secure copy (remote file copy)
sdiff����>Merge two files interactively
sed����>Stream Editor
seq����>Print numeric sequences
set����->Manipulate shell variables and functions
sftp����>Secure File Transfer Program
shift����>Shift positional parameters
shopt���>Shell Options
shutdown �>Shutdown or restart linux
sleep����>Delay for a specified time
sort����->Sort text files
source���>Run commands from a file `.�
split����>Split a file into fixed-size pieces
ssh�����>Secure Shell client (remote login program)
strace���->Trace system calls and signals
su�����>Substitute user identity
sum����>Print a checksum for a file
symlink��->Make a new name for a file
sync����>Synchronize data on disk with memory

tail�����>Output the last part of files
tar�����>Tape ARchiver
test����->Evaluate a conditional expression
time����>Measure Program running time
times����>User and system times
touch���->Change file timestamps
top�����>List processes running on the system
traceroute �>Trace Route to Host
trap����>Run a command when a signal is set(bourne)
tty�����>Print filename of terminal on stdin
type����>Describe a command

ulimit���->Limit user resources
umask���>Users file creation mask
umount��->Unmount a device
unalias���>Remove an alias
uname���>Print system information
unset����>Remove variable or function names
unshar���>Unpack shell archive scripts
useradd���>Create new user account
usermod��>Modify user account
users����>List users currently logged in

v������>Verbosely list directory contents (`ls -l -b�)
vdir����->Verbosely list directory contents (`ls -l -b�)
vi�����->Text Editor

watch���->Execute/display a program periodically
wc�����>Print byte, word, and line counts
whereis���>Report all known instances of a command
which���->Locate a program file in the user�s path.
while����>Execute commands
who����->Print all usernames currently logged in
whoami��->Print the current user id and name (`id -un�)
Wget����>Retrieve web pages or files via HTTP, HTTPS or FTP