How to stop receving messages from other user's

To stop receving messages from other user's

   
    $ mesg n


To allow messages from other user,type


    $ mesg y

How to display and use the last command you entered in your system

To display and use the last command you entered


    $ !!

How to know the details of CPU information

To know the information about the CPU,type


$ cat /proc/cpuinfo

Example is shown below:

How to show the details of hardware system components

To show the details of hardware system components,type


$ dmidecode -q


* Dmidecode means DMI table decoder. It contains a description of
system's hardware components and other useful information such
as serial number and BIOS version. To get the details of the
system components,you have to be a superuser. so type "sudo"
in-front of the command. Example is shown below

How to display PCI devices in your system

To get the details of PCI device, type


$ lspci -tv


example is shown below,

How to show USB devices in your system

To show USB devices,type


$ lsusb -tv


* lsusb is a utility to show the usb devices details ,example is
show below

How to plan a shutdown of the system

To plan a shutdown of the system, type


$ shutdown -h 16:30 &



To cancel a planned shutdown of the system,type


$ shutdown -c

How to view all files on the system with SUID configured

To view all files on the system with SUID configured, type


$ find / -perm -u+s

How to show the permits on files

To show permits on files, type

$ ls -lh

How to remove a service from all runlevels

To remove a service from all runlevels, type

$ update-rc.d -f remove <service_name>

How to open a PDF file

To open a PDF file,type

$ gnome-open abc.pdf

How to hide the user input in terminal

To hide user input in terminal, type

$ stty -echo

To turn on the user input, type

$ stty echo

How to know the ALSA (Advance Linux Sound Architecture) version

To get the ALSA version,type

$ cat /proc/asound/version

Example is shown below