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Archive for the month “January, 2012”

Quick Linux..

-linux is kernel.

-Kernel–lower abstraction layer of OS.

-linux distributions —ubantu , fedora ,opensuSE.

-OS Family—-Unix-like.

-Users operate a Linux-based system through a CLI, a GUI, or through controls attached to the associated hardware, which is common for embedded systems.

-CLI(Command Line Interface)–method of interaction with computer based on text commands -entered at the prompt.

-GUI-graphical user interface.

-Linux kernel is maintained by FLOSS(free/libre/open source  software).

-POSIX—portable operating system interface.

-Fact—Ubantu is an ancient african word, meaning ‘humaniy to others’

-Similar to explorer in Windows, there is nautilus in Ubantu.

for GUI(Gnome,KDE,XFCE) in Linux:-

-The syntax for a lookup in the manual is: man [-] [-k keywords] topic.

-Windows and Mac OS X have something in common: one desktop -GUI. Mac OS X doesnot even have multiple themes

-Linux  on the other hand, has 3 major desktop managers and more than 10 window managers.

-The GNOME project provides two things: The GNOME desktop environment, an intuitive andattractive desktop for users, and the GNOME development platform, an extensive framework forbuilding applications that integrate into the rest of the desktop.

Commands:::

-date—>shows current date.

-uptime—->shows time since last login.

-ls—->lists all the files.

-pwd—->shows your current location

-sudo—->makes you enter command as different user.

-cd dir_name—->navigates you to that directory.

-cd ..—->navigates you to home directory.

-whoami—->shows information about the current user.

-wget {path to file}–download the file from the internet.

-sudo apt-get install{packagename}–dowloads and install the package.

-uname -a: shows info about the kernel.

-df—shows info about disk usage.

-mkdir dir_namee—–creates new diretory.

-rm -r::::removes directory or file.

-cp -r ::: copy diectory or file.

-locate -r file*.txt—searches the indexes for all entries matching  file*.txt.

-ping{host}—sends ping to address u provide.

-whois{domain}—-shows whois info about the domain.

-iwlist scan—scans for available wireless network.

-lpq—  displays current print queue(A reserved area of memory or disk that holds output designated for the printer until the printer can receive it).

-smbtree—-shows available windows network share.

-ifconfig—configure TCP/IP network interfaces.

-apropose {subject}–list manual pages for subject.

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