COMP 3000 Lab 2 2012 - Revision history

Cdelahou: updated password

2012-11-01T16:54:58Z

updated password

← Older revision		Revision as of 16:54, 1 November 2012
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	To access the VMs open virtualbox, start menu, apps, virtualbox folder, virtualbox, it should be listed when you start the program. You can use the following accounts for the COMP2401-2404 IMAGE only! Note that only the '''admin''' account has root access.		To access the VMs open virtualbox, start menu, apps, virtualbox folder, virtualbox, it should be listed when you start the program. You can use the following accounts for the COMP2401-2404 IMAGE only! Note that only the '''admin''' account has root access.
	* Username: '''student''' Password: ''tneduts!''		* Username: '''student''' Password: ''tneduts!''
	* Username: '''admin''' Password: ''~~nimda1234~~!''		* Username: '''admin''' Password: ''nimda!''
	* Username: '''Starbuck''' Password: ''harbinger''		* Username: '''Starbuck''' Password: ''harbinger''

Jbeltram at 14:46, 16 October 2012

2012-10-16T14:46:05Z

← Older revision		Revision as of 14:46, 16 October 2012
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	Part A		Part A

	1.		# ps -aux<br/>ps -e<br/>Among others.
			# cron - Cron is the time-based job scheduler.<br/>lightdm - Display manager. It also manages the X servers and facilitates remote logins using the XDMCP protocol.<br/>Network Manager - NetworkManager is a set of co-operative tools that make networking simple and straightforward. Whether WiFi, wired, 3G, or Bluetooth, NetworkManager allows you to quickly move from one network to another user/sbin/modemmanager.<br/>Upstart Socket Bridge - The upstart-socket-bridge queries the Upstart init(8) daemon for all job configurations which start on or stop on the socket event. It then waits for an incoming connection on each specified socket(7) and when detected emits the socket event (socket-event (7)), setting a number of environment variables for the job to query.<br/>acpid - The acpid process is designed to notify user-space programs of ACPI events.<br/>These are just some examples of acceptable answers. There are others as well.
			# Make sure you are not logged into xsession, then restart lightdm with sudo service lightdm restart
			# It will automatically respawn itself. There is a line in the tty script that instructs the process to automatically restart in the case of failure or termination of the process.

	~~ps -aux~~		Part B

	ps -e		# The kernel starts the upstart daemon at system boot.
			# To reboot use either telinit 6 or shutdown -r. To shutdown use either telinit 0 or shutdown tool with -h option and a time.
	~~Among others~~.		# The links point to /lib/init/upstart-job. Ubuntu is transitioning from SysVinit scripts to upstart scripts, these links are used to redirect to the upstart services.
			# sudo apt-get install openssh-server.
	2.		# The init.d script is used only for chroot environments. See lines 14-26 in init.d/ssh script.
			# Can check syslog process to see which logs it directly writes too. Some acceptable answers are:
	~~cron~~		## auth.log - CRON, lightdm, polkitd
	- ~~Cron is the time~~-~~based job scheduler~~.		## boot.log - modem-manager
			## bootstrap.log - gpgv, dpkg
	~~lightdm~~		## dpkg.log - dpkg
	- ~~Display manager~~. ~~It also manages the X servers and facilitates remote logins using the XDMCP protocol~~.		## fontconfig.log - fontconfig
			## kern.log - kernel
	~~Network Manager~~		## pm-powersave.log - powerd
	- ~~NetworkManager~~ is ~~a set~~ of ~~co-operative tools that make networking simple and straightforward~~. ~~Whether WiFi, wired, 3G, or Bluetooth, NetworkManager allows you~~ to ~~quickly move from one network to another user~~/sbin/~~modemmanager.~~		## pm-suspend.log - sleepd
			## ufw.log - ufw
	~~Upstart Socket Bridge~~		# test -x /usr/sbin/sshd \|\| exit 0 - Check whether "/usr/sbin/sshd" exists and is executable and exit with status of 0 if not. Used to verify SSHD is installed.<br/>( /usr/sbin/sshd -\? 2>&1 \| grep -q OpenSSH ) 2>/dev/null \|\| exit 0 - Runs SSH script with illegal option and pipes the output to grep to check for OpenSSH. Rest is piped to /dev/null essentially discarding it. This line checks to verify that the version of SSH installed is OpenSSH. If not will exit with status of 0.
	- ~~The upstart~~-~~socket~~-~~bridge queries~~ the ~~Upstart init(8) daemon~~ for ~~all job configurations which start on or stop on the socket event~~. It ~~then waits~~ ~~for an incoming connection on each specified socket(7) and when detected emits~~ the ~~socket event (socket-event (7)), setting a number~~ of ~~environment variables for the job to query.~~		# test -x /usr/sbin/sshd \|\| { stop; exit 0; }<br/>Does not have a check for OpenSSH.
			# Plymouth is a bootsplash. It provides a graphical boot animation while the boot process takes place in the background.
	~~acpid~~
	~~- The acpid process~~ is ~~designed to notify user-space programs of ACPI events~~.
	~~These are just some examples~~ of ~~acceptable answers. There are others as well~~.

	3.
	~~Make sure you are not logged into xsession, then restart lightdm with sudo service lightdm restart~~

	4.
	It ~~will automatically respawn itself. There is~~ a ~~line in the tty script that instructs~~ the process ~~to automatically restart~~ in the ~~case of failure or termination of the process~~.

Jbeltram at 14:33, 16 October 2012

2012-10-16T14:33:06Z

← Older revision		Revision as of 14:33, 16 October 2012
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	==Answers==		==Answers==
	Part A		Part A

	1.		1.

	ps -aux		ps -aux

	ps -e		ps -e

	Among others.		Among others.

	2.		2.

	cron		cron
	- Cron is the time-based job scheduler.		- Cron is the time-based job scheduler.

	lightdm		lightdm
	- Display manager. It also manages the X servers and facilitates remote logins using the XDMCP protocol.		- Display manager. It also manages the X servers and facilitates remote logins using the XDMCP protocol.

	Network Manager		Network Manager
	- NetworkManager is a set of co-operative tools that make networking simple and straightforward. Whether WiFi, wired, 3G, or Bluetooth, NetworkManager allows you to quickly move from one network to another user/sbin/modemmanager.		- NetworkManager is a set of co-operative tools that make networking simple and straightforward. Whether WiFi, wired, 3G, or Bluetooth, NetworkManager allows you to quickly move from one network to another user/sbin/modemmanager.

	Upstart Socket Bridge		Upstart Socket Bridge
	- The upstart-socket-bridge queries the Upstart init(8) daemon for all job configurations which start on or stop on the socket event. It then waits for an incoming connection on each specified socket(7) and when detected emits the socket event (socket-event (7)), setting a number of environment variables for the job to query.		- The upstart-socket-bridge queries the Upstart init(8) daemon for all job configurations which start on or stop on the socket event. It then waits for an incoming connection on each specified socket(7) and when detected emits the socket event (socket-event (7)), setting a number of environment variables for the job to query.

	acpid		acpid
	- The acpid process is designed to notify user-space programs of ACPI events.		- The acpid process is designed to notify user-space programs of ACPI events.
	These are just some examples of acceptable answers. There are others as well.		These are just some examples of acceptable answers. There are others as well.

	3. Make sure you are not logged into xsession, then restart lightdm with sudo service lightdm restart		3.
			Make sure you are not logged into xsession, then restart lightdm with sudo service lightdm restart

	4. It will automatically respawn itself. There is a line in the tty script that instructs the process to automatically restart in the case of failure or termination of the process.		4.
			It will automatically respawn itself. There is a line in the tty script that instructs the process to automatically restart in the case of failure or termination of the process.

Jbeltram at 14:28, 16 October 2012

2012-10-16T14:28:50Z

← Older revision		Revision as of 14:28, 16 October 2012
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	# [1] What is plymouth?		# [1] What is plymouth?
	# '''BONUS: ''' [5] Trace plymouth's behavior throughout the boot process.		# '''BONUS: ''' [5] Trace plymouth's behavior throughout the boot process.

			==Answers==
			Part A
			1.
			ps -aux
			ps -e
			Among others.

			2.
			cron
			- Cron is the time-based job scheduler.
			lightdm
			- Display manager. It also manages the X servers and facilitates remote logins using the XDMCP protocol.
			Network Manager
			- NetworkManager is a set of co-operative tools that make networking simple and straightforward. Whether WiFi, wired, 3G, or Bluetooth, NetworkManager allows you to quickly move from one network to another user/sbin/modemmanager.
			Upstart Socket Bridge
			- The upstart-socket-bridge queries the Upstart init(8) daemon for all job configurations which start on or stop on the socket event. It then waits for an incoming connection on each specified socket(7) and when detected emits the socket event (socket-event (7)), setting a number of environment variables for the job to query.
			acpid
			- The acpid process is designed to notify user-space programs of ACPI events.
			These are just some examples of acceptable answers. There are others as well.

			3. Make sure you are not logged into xsession, then restart lightdm with sudo service lightdm restart

			4. It will automatically respawn itself. There is a line in the tty script that instructs the process to automatically restart in the case of failure or termination of the process.

Soma: /* Part A */

2012-09-25T18:52:35Z

Part A

← Older revision		Revision as of 18:52, 25 September 2012
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	# [2] How can you get a list of all of the processes running on the system from the command line? Please give the command and required arguments, if any.		# [2] How can you get a list of all of the processes running on the system from the command line? Please give the command and required arguments, if any.
	# [10] What are five processes that are running on your system as non-regular users (i.e., as users other than the one you logged in as)? What does each do, briefly? Note: please exclude all processes enclosed in [], as those are built in to the kernel.		# [10] What are five processes that are running on your system as non-regular users (i.e., as users other than the one you logged in as)? What does each do, briefly? Note: please exclude all processes enclosed in [], as those are built in to the kernel.
	# [1] How can I restart the graphical login screen on Ubuntu? (Hint: use virtual terminals and Ctrl-Alt-F? combinations to access a terminal that is independent of the GUI.)		# [1] How can I restart the graphical login screen on Ubuntu? (Hint: use virtual terminals and Ctrl-Alt-F? combinations to access a terminal that is independent of the GUI. Also, make sure you are aren't logged into a graphical session when you try this!)
	# [2] What happens when you send a kill -9 signal to one of the <tt>getty</tt> processes that are running by default? Why?		# [2] What happens when you send a kill -9 signal to one of the <tt>getty</tt> processes that are running by default? Why?

Afry: /* Part B */ wrong directory!!

2012-09-25T17:39:07Z

Part B: wrong directory!!

← Older revision		Revision as of 17:39, 25 September 2012
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	# [2] What starts the upstart daemon? When is it started?		# [2] What starts the upstart daemon? When is it started?
	# [2] How would you "change the system runlevel" to reboot? Shut down?		# [2] How would you "change the system runlevel" to reboot? Shut down?
	# [2] Look at the output of <tt>ls -l /etc/init/</tt>. You will note <tt>-></tt> for many of the entries. This arrow shows that those entries are symbolic links. Where do most of these symbolic links point to? Why?		# [2] Look at the output of <tt>ls -l /etc/init.d/</tt>. You will note <tt>-></tt> for many of the entries. This arrow shows that those entries are symbolic links. Where do most of these symbolic links point to? Why?
	# [2] Install the <tt>openssh-server</tt> package in your virtual machine from the command line. What command(s) did you use?		# [2] Install the <tt>openssh-server</tt> package in your virtual machine from the command line. What command(s) did you use?
	# [2] Note that <tt>sshd</tt> has separate entries in <tt>/etc/init</tt> and <tt>/etc/init.d</tt> differ. Why do both exist (when most services have either one or the other)?		# [2] Note that <tt>sshd</tt> has separate entries in <tt>/etc/init</tt> and <tt>/etc/init.d</tt> differ. Why do both exist (when most services have either one or the other)?

Afry: added the correct root password and the image name

2012-09-25T17:36:50Z

added the correct root password and the image name

← Older revision		Revision as of 17:36, 25 September 2012
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	You will need to do this assignment on an Ubuntu 12.04 machine that you have root access to. Generally this will be a virtual machine. In the labs, you can access pre-made Ubuntu virtual machines in VirtualBox. Note that these are for other courses; we, however, can use them as well as we just need a standard Ubuntu install.		You will need to do this assignment on an Ubuntu 12.04 machine that you have root access to. Generally this will be a virtual machine. In the labs, you can access pre-made Ubuntu virtual machines in VirtualBox. Note that these are for other courses; we, however, can use them as well as we just need a standard Ubuntu install.

	To access the VMs open virtualbox, start menu, apps, virtualbox folder, virtualbox, it should be listed when you start the program. You can use the following accounts. Note that only the '''admin''' account has root access.		To access the VMs open virtualbox, start menu, apps, virtualbox folder, virtualbox, it should be listed when you start the program. You can use the following accounts for the COMP2401-2404 IMAGE only! Note that only the '''admin''' account has root access.
	* Username: '''student''' Password: ''tneduts!''		* Username: '''student''' Password: ''tneduts!''
	* Username: '''admin''' Password: ''nimda1234!''		* Username: '''admin''' Password: ''nimda1234!''

Afry: /* Running Ubuntu in Lab */

2012-09-25T17:34:27Z

Running Ubuntu in Lab

← Older revision		Revision as of 17:34, 25 September 2012
Line 20:		Line 20:
	To access the VMs open virtualbox, start menu, apps, virtualbox folder, virtualbox, it should be listed when you start the program. You can use the following accounts. Note that only the '''admin''' account has root access.		To access the VMs open virtualbox, start menu, apps, virtualbox folder, virtualbox, it should be listed when you start the program. You can use the following accounts. Note that only the '''admin''' account has root access.
	* Username: '''student''' Password: ''tneduts!''		* Username: '''student''' Password: ''tneduts!''
	* Username: '''admin''' Password: ''~~nimda~~!''		* Username: '''admin''' Password: ''nimda1234!''
	* Username: '''Starbuck''' Password: ''harbinger''		* Username: '''Starbuck''' Password: ''harbinger''

Soma: /* Running Ubuntu in Lab */

2012-09-24T18:49:14Z

Running Ubuntu in Lab

← Older revision		Revision as of 18:49, 24 September 2012
Line 18:		Line 18:
	You will need to do this assignment on an Ubuntu 12.04 machine that you have root access to. Generally this will be a virtual machine. In the labs, you can access pre-made Ubuntu virtual machines in VirtualBox. Note that these are for other courses; we, however, can use them as well as we just need a standard Ubuntu install.		You will need to do this assignment on an Ubuntu 12.04 machine that you have root access to. Generally this will be a virtual machine. In the labs, you can access pre-made Ubuntu virtual machines in VirtualBox. Note that these are for other courses; we, however, can use them as well as we just need a standard Ubuntu install.

	To access the VMs open virtualbox, start menu, apps, virtualbox folder, virtualbox, it should be listed when you start the program. You can use the following accounts:		To access the VMs open virtualbox, start menu, apps, virtualbox folder, virtualbox, it should be listed when you start the program. You can use the following accounts. Note that only the '''admin''' account has root access.
	* Username: '''student''' Password: ''tneduts!''		* Username: '''student''' Password: ''tneduts!''
	* Username: '''admin''' Password: ''nimda!'' ~~Note: this one has root access.~~		* Username: '''admin''' Password: ''nimda!''
	* Username: '''Starbuck''' Password: ''harbinger''		* Username: '''Starbuck''' Password: ''harbinger''

Soma: /* Running Ubuntu in Lab */

2012-09-24T18:48:35Z

Running Ubuntu in Lab

← Older revision		Revision as of 18:48, 24 September 2012
Line 20:		Line 20:
	To access the VMs open virtualbox, start menu, apps, virtualbox folder, virtualbox, it should be listed when you start the program. You can use the following accounts:		To access the VMs open virtualbox, start menu, apps, virtualbox folder, virtualbox, it should be listed when you start the program. You can use the following accounts:
	* Username: '''student''' Password: ''tneduts!''		* Username: '''student''' Password: ''tneduts!''
	* Username: '''admin''' Password: ''nimda!''		* Username: '''admin''' Password: ''nimda!'' Note: this one has root access.
	* Username: '''Starbuck''' Password: ''harbinger''		* Username: '''Starbuck''' Password: ''harbinger''