show architecture of machine(1)

show the timetable of 2007

show information CPU info  

show interrupts

verify memory use  

show file(s) swap  

show version of the kernel  

show network adpters and statistics  

show mounted file system(s)  

save date changes on BIOS  

show system date  

set date and time - MonthDayhoursMinutesYear.Seconds  

show hardware system components - (SMBIOS / DMI)  

displays the characteristics of a hard-disk  

perform test reading on a hard-disk  

display PCI devices  

show USB devices  

show architecture of machine(2)  

show used kernel version  

shutdown system(2)  

leaving session  

reboot(2)  

shutdown system(1)  

planned shutdown of the system at 16:30  

cancel a planned shutdown of the system  

reboot(1)  

shutdown system(3)  

enter to directory '/ home'  

go back one level  

go back two levels  

go to home directory  

go to home directory  

go to previous directory  

copying a file  

copy all files of a directory within the current work directory  

copy a directory within the current work directory  

copy a directory  

outputs the mime type of the file as text  

lists known encodings  

converting the coding of characters from one format to another  

batch resize files in the current directory and send them to a thumbnails directory (requires convert from Imagemagick)  

create a symbolic link to file or directory  

create a physical link to file or directory  

view files of directory  

view files of directory  

show details of files and directory  

show hidden files  

show files and directory containing numbers  

show files and directories in a tree starting from root(2)  

create a directory called 'dir1'  

create two directories simultaneously  

create a directory tree  

rename / move a file or directory  

show the path of work directory  

delete file called 'file1'  

remove a directory called 'dir1' and contents recursively  

remove two directories and their contents recursively  

delete directory called 'dir1'  

modify timestamp of a file or directory - (YYMMDDhhmm)  

show files and directories in a tree starting from root(1)  

search file and directory into root filesystem from '/'  

search files and directories belonging to 'user1'  

search files with '. bin' extension within directory '/ home/user1'  

search binary files are not used in the last 100 days  

search files created or changed within 10 days  

search files with '.rpm' extension and modify permits  

search files with '.rpm' extension ignoring removable partitions as cdrom, pen-drive, etc.…  

find files with the '.ps' extension - first run 'updatedb' command  

show location of a binary file, source or man  

show full path to a binary / executable  

force umount when the device is busy  

mount disk called hda2 - verify existence of the directory '/ mnt/hda2'  

mount a floppy disk  

mount a cdrom / dvdrom  

mount a cdrw / dvdrom  

mount a cdrw / dvdrom  

mount a file or iso image  

mount a Windows FAT32 file system  

mount a usb pen-drive or flash-drive  

mount a windows network share  

unmount disk called hda2 - exit from mount point '/ mnt/hda2' first  

run umount without writing the file /etc/mtab - useful when the file is read-only or the hard disk is full  

show list of partitions mounted  

show the used space by installed deb packages, sorting by size (debian, ubuntu and alike)  

estimate space used by directory 'dir1'  

show size of the files and directories sorted by size  

show size of the files and directories ordered by size  

show the used space by rpm packages installed sorted by size (fedora, redhat and alike)  

set deadline for user password  

create a new group  

delete a group  

rename a group from moon to sun  

check correct syntax and file format of '/etc/group' and groups existence  

log into a new group to change default group of newly created files  

change password  

change a user password (only by root)  

check correct syntax and file format of '/etc/passwd' and users existence  

create a new user "user1" belongs "admin" group  

create a new user  

delete a user ( '-r' eliminates home directory)  

change user attributes as description, group and other  

change group of files  

set permissions reading (r), write (w) and (x) access to users owner (u) group (g) and others (o)  

remove permits reading (r), write (w) and (x) access to users group (g) and others (or  

set SUID bit on a binary file - the user that running that file gets same privileges as owner  

disable SUID bit on a binary file  

set SGID bit on a directory - similar to SUID but for directory  

disable SGID bit on a directory  

set STIKY bit on a directory - allows files deletion only to legitimate owners  

disable STIKY bit on a directory  

change owner of a file  

change user owner of a directory and all the files and directories contained inside  

change user and group ownership of a file  

view all files on the system with SUID configured  

show permits on files  

divide terminal into 5 columns  

allows write opening of a file only append mode  

allows that a file is compressed / decompressed automatically by the kernel  

makes sure that the program ignores Dump the files during backup  

makes it an immutable file, which can not be removed, altered, renamed or linked  

allows a file to be deleted safely  

makes sure that if a file is modified changes are written in synchronous mode as with sync  

allows you to recover the contents of a file even if it is canceled  

show specials attributes  

decompress a file called 'file1.bz2'  

compress a file called 'file1'  

decompress a file called 'file1.gz'  

compress a file called 'file1'  

compress with maximum compression  

create an archive rar called 'file1.rar'  

compress 'file1', 'file2' and 'dir1' simultaneously  

decompress rar archive  

create a uncompressed tarball  

create an archive containing 'file1', 'file2' and 'dir1'  

show contents of an archive  

extract a tarball  

extract a tarball into / tmp  

create a tarball compressed into bzip2  

decompress a compressed tar archive in bzip2  

create a tarball compressed into gzip  

decompress a compressed tar archive in gzip  

decompress rar archive  

decompress a zip archive  

create an archive compressed in zip  

compress in zip several files and directories simultaneously  

install a rpm package  

install a rpm package ignoring dependencies requests  

upgrade a rpm package without changing configuration files  

upgrade a rpm package only if it is already installed  

remove a rpm package  

show all rpm packages installed on the system  

show all rpm packages with the name "httpd"  

obtain information on a specific package installed  

show rpm packages of a group software  

show list of files provided by a rpm package installed  

show list of configuration files provided by a rpm package installed  

show list of dependencies required for a rpm packet  

show capability provided by a rpm package  

show scripts started during installation / removal  

show history of revisions of a rpm package  

verify which rpm package belongs to a given file  

show list of files provided by a rpm package not yet installed  

import public-key digital signature  

verify the integrity of a rpm package  

verify integrity of all rpm packages installed  

check file size, permissions, type, owner, group, MD5 checksum and last modification  

check all rpm packages installed on the system - use with caution  

verify a rpm package not yet installed  

install a package built from a rpm source  

extract executable file from a rpm package  

build a rpm package from a rpm source  

download and install a rpm package  

That will install an RPM, and try to resolve all the dependencies for you using your repositories.  

update all rpm packages installed on the system  

upgrade a rpm package  

remove a rpm package  

list all packages installed on the system  

find a package on rpm repository  

clean up rpm cache erasing downloaded packages  

remove all files headers that the system uses to resolve dependency  

remove from the cache packages and headers files  

install / upgrade a deb package  

remove a deb package from the system  

show all deb packages installed on the system  

show all deb packages with the name "httpd"  

obtain information on a specific package installed on system  

show list of files provided by a package installed on system  

show list of files provided by a package not yet installed  

verify which package belongs to a given file  

returns list of packages which corresponds string "searched-packages"  

install / upgrade a deb package from cdrom  

install / upgrade a deb package  

update the package list  

upgrade all of the installed packages  

remove a deb package from system  

verify correct resolution of dependencies  

clean up cache from packages downloaded  

Install package 'name' with dependencies  

Delete package 'name' and all files of it  

view the contents of a file starting from the first row  

view first two lines of a file  

similar to 'more' command but which allows backward movement in the file as well as forward movement  

view content of a file along  

view the contents of a file starting from the last line  

view last two lines of a file  

view in real time what is added to a file  

remove all even lines from example.txt  

view the first column of a line  

view the first and third column of a line  

number row of a file  

compare contents of two files by deleting only unique lines from 'file1'  

compare contents of two files by deleting only unique lines from 'file2'  

compare contents of two files by deleting only the lines that appear on both files  

find differences between two files  

look up words "Aug" on file '/var/log/messages'  

look up words that begin with "Aug" on file '/var/log/messages'  

select from file '/var/log/messages' all lines that contain numbers  

search string "Aug" at directory '/var/log' and below  

merging contents of two files for columns  

merging contents of two files for columns with '+' delimiter on the center  

find differences between two files and merge interactively alike "diff"  

replace "string1" with "string2" in example.txt  

remove all blank lines from example.txt  

remove comments and blank lines from example.txt  

eliminates the first line from file example.txt  

view only lines that contain the word "string1"  

remove empty characters at the end of each row  

remove only the word "string1" from text and leave intact all  

print from 1th to 5th row of example.txt  

print row number 5 of example.txt  

replace more zeros with a single zero  

sort contents of two files  

sort contents of two files omitting lines repeated  

sort contents of two files by viewing only unique line  

sort contents of two files by viewing only duplicate line  

convert from lower case in upper case  

convert a text file format from MSDOS to UNIX  

convert a text file to html  

show all available formats conversion  

convert a text file format from UNIX to MSDOS  

check bad blocks on disk hda1  

repair / check integrity of dos filesystems on disk hda1  

repair / check integrity of ext2 filesystem on disk hda1  

repair / check integrity of ext3 filesystem on disk hda1  

repair / check integrity of linux filesystem on disk hda1  

repair / check integrity of ext2 filesystem on disk hda1  

repair / check integrity of ext3 filesystem on disk hda1  

repair / check integrity of fat filesystem on disk hda1  

repair / check integrity of dos filesystem on disk hda1  

format a floppy disk  

create a filesystem type linux ext2 on hda1 partition  

create a filesystem type linux ext3 (journal) on hda1 partition  

create a filesystem type linux on hda1 partition  

create a FAT32 filesystem  

create a swap filesystem  

create a swap filesystem  

activating a new swap partition  

activate two swap partitions  

find all files with '.log' extention and make an bzip archive  

find and copy all files with '.txt' extention from a directory to another  

make a backup of a local hard disk on remote host via ssh  

backup content of the harddrive to a file  

make a copy of MBR (Master Boot Record) to floppy  

restore MBR from backup copy saved to floppy  

make a full backup of directory '/home'  

make a incremental backup of directory '/home'  

restoring a backup interactively  

synchronization between directories  

rsync via SSH tunnel  

synchronize a local directory with a remote directory via ssh and compression  

synchronize a remote directory with a local directory via ssh and compression  

make a incremental backup of directory '/home/user'  

copy content of a directory on remote directory via ssh  

copy a local directory on remote directory via ssh  

local copy preserving permits and links from a directory to another  

rip audio tracks from a CD to wav files  

rip first three audio tracks from a CD to wav files  

clean a rewritable cdrom  

burn an ISO image  

burn a compressed ISO image  

scan bus to identify the channel scsi  

perform an md5sum on a device, like a CD  

create an iso image of cdrom on disk  

create a compressed iso image of cdrom on disk  

create an iso image of a directory  

mount an ISO image  

active interface 'eth0' in dhcp mode  

show network statistics of eth0  

lookup hostname to resolve name to ip address and viceversa  

show hostname of system  

show configuration of an ethernet network card  

configure IP Address  

configure 'eth0' in promiscuous mode to gather packets (sniffing)  

disable an interface 'eth0'  

activate an interface 'eth0'  

show link status of all network interfaces  

show wireless networks  

wifi scanning to display the wireless connections available  

show link status of 'eth0'  

show all active network connections and their PID  

show all network services listening on the system and their PID  

show routing table alike "route -n"  

lookup hostname to resolve name to ip address and viceversa  

show routing table  

configure default gateway  

configure static route to reach network '192.168.0.0/16'  

remove static route  

activate ip routing temporarily  

show all HTTP traffic  

lookup on Whois database  

mount a windows network share  

netbios name resolution  

netbios name resolution  

show remote shares of a windows host  

like wget can download files from a host windows via smb  

show all chains of filtering table  

show all chains of nat table  

clear all rules from filtering table  

clear all rules from table nat  

delete any chains created by user  

allow telnet connections to input  

block HTTP connections to output  

allow POP3 connections to forward chain  

Logging on input chain  

configure a PAT (Port Address Traslation) on eth0 masking outbound packets  

redirect packets addressed to a host to another host  

displays status of RAM in megabytes  

force closure of the process and finish it  

force a process to reload configuration  

show history reboot  

display kernel loaded  

display a list of files opened by processes  

displays a list of open files in a given path system  

displays linux tasks  

displays linux tasks in a hierarchical mode  

mostra un albero dei processi sistema Shows a tree system processes  

monitoring reliability of a hard-disk through SMART  

check if SMART is active on a hard-disk  

display system calls made and received by a process  

display library calls  

show events inherent to the process of booting kernel  

show system events  

display linux tasks using most cpu  

display interrupts in real-time  

set an alias for a command - hh = history  

display a list of commands that pertain to keywords of a program , useful when you know what your program does, but you don't know the name of the command  

change shell command  

nice command to know if you have to remote into another box  

encrypt a file with GNU Privacy Guard  

decrypt a file with GNU Privacy Guard  

show shared libraries required by ssh program  

display the on-line manual pages for example on ping command - use '-k' option to find any related commands  

create a boot floppy  

download an entire web site  

download a file with the ability to stop the download and resume later  

start a download at any given time  

displays description of what a program does  

show who is logged on, and print: time of last system boot, dead processes, system login processes, active processes spawned by init, current runlevel, last system clock change