July 21st #dgplug session

july21dgplug

[18:41] <chandankumar> <------- SESSION START ------->
[18:41] <chandankumar> Roll Call
[18:41] <bnprk> Binay Pareek
[18:41] <silentSae> Amir
[18:41] <eeshangarg> Eeshan Garg
[18:41] <EkAurBottleLa> Sunit Jain
[18:41] <umeshs> Umesh Sharnagat
[18:41] <dhritishikhar_> Dhriti Shikhar
[18:41] <iamviknesh> vikneshwar
[18:41] <senju> Vikash patil
[18:41] <thejaman> Thejazeto
[18:41] <mnw94> Mayuresh Waykole
[18:41] <lixxz> Yasharth
[18:41] <sivteck> Sivaram Balakrishnan
[18:41] <surabhi> Surabhi
[18:41] <heena> Heena Kaushar
[18:41] <gnovi> Praveen Patil
[18:41] <prajesh> prajesh rawat
[18:41] <stguin> satam guin
[18:41] <yogeshwar> Yogeshwar
[18:41] <shilpi> shilpi shukla
[18:41] <ramsan> ramsandesh
[18:41] <Mactoc_> Sreedevi
[18:41] <jaba> Athira S
[18:41] <harsha> Harsha
[18:41] <kanika04> kanika narang
[18:41] <CuriousLearner> Sanyam Khurana
[18:41] <shrees> Shikha Shree
[18:41] <magzter> Mahendra Yadav
[18:42] <dev212> Dhanya N
[18:42] <Sparking> Bhargav Patel
[18:42] <Prash_542_> Prashant Surya
[18:42] <codaholic> Anjali Menon
[18:42] <madangel> aparna
[18:43] <chandankumar> First we are going to take questions from previous class and from home work.
[18:43] <chandankumar> Please shoot your questions.
[18:43] <CuriousLearner> !
[18:43] <chandankumar> next
[18:43] <batul> CuriousLearner please ask your question.
[18:43] <papiya> Papiya Sen
[18:44] <zishan> Sheesh Mohsin
[18:44] <abhiram_rk> Abhiram ravikumar
[18:44] <abhiram_rk> !
[18:44] *** gajanan is now known as gajanan-away.
[18:44] <CuriousLearner> for open ports netstat -lnp , is it correct, also what does it mean by port is listening?
[18:45] <chandankumar> CuriousLearner, you can use netstat --listen for open ports.
[18:45] <chandankumar> CuriousLearner, yes
[18:45] <CuriousLearner> chandankumar, listen means they are open and not used by any service? <eof>
[18:46] <donniezazen> Sudhir Khanger
[18:46] <chandankumar> yes
[18:46] <CuriousLearner> ok
[18:46] <chandankumar> next
[18:46] <batul> abhiram_rk please ask your question.
[18:46] <abhiram_rk> How do you measure the remaining space on the /home ? Does that mean a specific space is allotted to each directory?
[18:47] <chandankumar> abhiram_rk, before coming to your question how to find available space in home directory?
[18:47] <-- gnovi ([email protected]) has left this server (Read error: Connection reset by peer).
[18:48] <donniezazen> abhiram_rk: df /home
[18:48] <chandankumar> Anyone can go ahead to reply abhiram_rk question?
[18:49] <lixxz> df -h /home is better
[18:49] <donniezazen> or rather df -h /home yes
[18:49] <silentSae> free /home
[18:49] <donniezazen> -h makes it human readable.
[18:49] <abhiram_rk> I wasn't asking about the command.
[18:50] <donniezazen> silentSae: free is for system memory and not disk space.
[18:50] <abhiram_rk> What does "remaining space" mean? Is it for the entire file system?
[18:50] <donniezazen> Space is not allotted to any particular directory
[18:50] <donniezazen> Directories or files are mere links to memory location on disk.
[18:51] <abhiram_rk> donniezazen: What is system memory and disk space? I'm a little confused about the whole space thing.
[18:51] <abhiram_rk> donniezazen: Okay, elaborate please?
[18:51] <donniezazen> remaining space is amount of space that is available to you.
[18:51] <donniezazen> System memory is RAM.
[18:51] <donniezazen> Disk space is the amount of hard disk space available.
[18:52] <chandankumar> abhiram_rk, system memory is refers to RAM and disk space is your hard drive
[18:52] <-- Prash_542_ (0825e214@gateway/web/freenode/ip.8.37.226.20) has left this server (Ping timeout: 246 seconds).
[18:52] <abhiram_rk> chandankumar: donniezazen Cool. I understood. <eof>
[18:52] <chandankumar> next
[18:52] <batul> No one is in queue.
[18:53] <chandankumar> Any question which is not solved from home task
[18:53] <chandankumar> if no, then i am proceeding ahead
[18:54] <chandankumar> in question 4, we have to ask for pid of a root user.
[18:54] <chandankumar> But pid does not exits for a root user.
[18:54] <chandankumar> For a user there always a user id.
[18:54] <chandankumar> try id command in your terminal
[18:55] <-- shrees ([email protected]) has left this server (Remote host closed the connection).
[18:55] <abhiram_rk> Shows uid, gid, etc
[18:55] <chandankumar> so for every user, there are four things to be known
[18:55] <chandankumar> one is uid -- user id
[18:55] <chandankumar> gid -- group id
[18:56] <chandankumar> groups -- every user belongs to a certain groups
[18:56] <chandankumar> wheels -- it is also a group which tells do a user has sudo permission or not.
[18:57] <chandankumar> Have everybody solved question 6?
[18:57] <chandankumar> what is question no 6 in home task?
[18:58] <sivteck>  chandankumar 6. Numbers of users present in the current system
[18:58] <CuriousLearner> Yes, done,
[18:58] <CuriousLearner> number of users in current system
[18:58] <chandankumar> CuriousLearner, what is the command for that?
[18:59] <CuriousLearner> users|wc -w
[19:00] <CuriousLearner> chandankumar, ^^
[19:00] <chandankumar> CuriousLearner, it will tell only no.of users logged in the current system
[19:00] <Mactoc_> who command
[19:00] <iamviknesh> CuriousLearner:  who | wc -l
[19:00] <iamviknesh> sorry chandankumar ^^
[19:00] <chandankumar> In linux box, all the user information is stored in /etc/passwd file
[19:00] <lixxz> i used grep
[19:00] <chandankumar> check this file in vim editor
[19:01] <lixxz> chandankumar, i used grep to extract information from /etc/passwd and finally prinout no of users
[19:01] <chandankumar> and their password and other info is stored in /etc/shadow file.
[19:01] <chandankumar> lixxz, yes
[19:01] <chandankumar> cat /etc/passwd | wc -l
[19:01] <chandankumar> it will print no. of users in your system
[19:02] <abhiram_rk> !
[19:02] <chandankumar> you can find more information in /etc/passwd
[19:02] <chandankumar> nect
[19:02] <chandankumar> next
[19:02] <batul> abhiram_rk please ask your question.
[19:02] <abhiram_rk> How do you define users? There are so many I haven't created.
[19:03] <donniezazen> abhiram_rk: What's the output of "users"?
[19:03] <abhiram_rk> donniezazen:  Only the current users.
[19:03] <chandankumar> anyone wants to answer above question?
[19:04] <donniezazen> I don't have a book definition but users are things that are allowed to do certain tasks on a system.
[19:04] <chandankumar> /etc/passwd contains a list of system's account
[19:05] <abhiram_rk> Yeah. I have 47 users on my computer. according to /etc/passwd
[19:05] <chandankumar> http://www.linfo.org/etc_passwd.html
[19:06] <umeshs> donniezazen users gives list of active users .. I think first column is username an second one is group name
[19:06] <umeshs> abhiram_rk no.. actually that file contains all the details of user
[19:06] <umeshs> along with there password
[19:07] <chandankumar> The users which you are seeing are system defined and created for different purposes.
[19:07] <abhiram_rk> chandankumar: So when I install an application, it gets shown as a new user? Exp: mysql
[19:07] <chandankumar> yes
[19:07] <abhiram_rk> provided the application creates accounts.
[19:08] <umeshs> ok. and sorry for wrong info
[19:08] <chandankumar> there are different system defined users for different processes.
[19:08] <chandankumar> next
[19:08] <batul> No one is in queue.
[19:08] <dhritishikhar_> !
[19:08] <titli> !
[19:08] <chandankumar> next
[19:08] <batul> dhritishikhar_ please ask your question.. titli you are next. Get ready with your question.
[19:08] <dhritishikhar_> what is the use of those users present in /etc/passwd?
[19:08] <donniezazen> abhiram_rk: It may or may not need a user. But yes mysql will have one.
[19:09] <chandankumar> dhritishikhar_, those others users are for performing and executing different processes.
[19:10] <abhiram_rk> donniezazen: If that's the case why is my VLC or gedit not shown? Aren't those applications too?
[19:10] <chandankumar> every process is associated with an user and an user has multiple process associated with it.
[19:11] <chandankumar> try command top
[19:11] <donniezazen> abhiram_rk: VLC or gedit run as your user. They aren't running any process in background. VLC gets quit as soon as you click quit.
[19:11] <chandankumar> and press arrow keys, you can lots of users
[19:11] <abhiram_rk> donniezazen: got it.
[19:11] <Mactoc_> http://www.cyberciti.biz/faq/understanding-etcpasswd-file-format/
[19:12] <chandankumar> you can find lightdm user
[19:12] <chandankumar> which is associated for running systemd command
[19:13] <CuriousLearner> root
[19:13] <silentSae> !
[19:13] <chandankumar> root is the super user and he has lots of process associated with it.
[19:13] <chandankumar> next
[19:13] <batul> titli please ask your question.. silentSae you are next. Get ready with your question.
[19:13] <titli> does each user  is related to different ports like mail, ftp etc?
[19:14] <chandankumar> titli, good question
[19:14] <chandankumar> an user is not associated with port.
[19:15] <chandankumar> a service like ftp or httpd is associated with the ports
[19:15] <chandankumar> next
[19:15] <batul> silentSae please ask your question.
[19:15] <silentSae> first line of top shows "1 user". Does that refer to the user that is using top?
[19:15] <titli> chandankumar, ok.
[19:16] <chandankumar> silentSae, yes
[19:16] <chandankumar> next
[19:16] <batul> No one is in queue.
[19:16] <silentSae> chandankumar, I strangely don't see lightdm
[19:16] <chandankumar> silentSae, it is running in my system
[19:17] <chandankumar> silentSae, any other user you see in your system.
[19:17] <silentSae> is it possible that it's not there as I'm using ubuntu?
[19:17] <silentSae> yes I see root, rkkit and amir
[19:17] <silentSae> <eof>
[19:18] <titli> chandankumar, but I am watching that most of the users are related to some certain protocol .
[19:18] <donniezazen> silentSae: lightdm is a login manager. It might be normal that it is not running or not showing up in top.
[19:19] <chandankumar> silentSae, http://postimg.org/image/oos6hz37h/
[19:20] <chandankumar> titli, can you protocol?
[19:20] <chandankumar> titli, *can you define protocol?
[19:21] <chandankumar> silentSae, yes
[19:21] <titli> chandankumar, yes protocols are like defined rules to execute processes.
[19:22] <-- ramsan ([email protected]) has left this server (Quit: ChatZilla 0.9.90.1 [Firefox 30.0/20140608211622]).
[19:22] <chandankumar> titli, so protocols are used by a service and service is dependent on a user.
[19:22] <chandankumar> let us take an example of ftp.
[19:23] <chandankumar> for FTP, we need  a service that provides ftp should be running.
[19:23] <chandankumar> and for transfer for data there must be a port associated with it
[19:24] <chandankumar> and flow of data depends upon the protocol.
[19:24] <Poornima_> sorry i joined very late due network issue can someone share me todays session discussion ? :(
[19:25] <titli> chandankumar, ok so whenever an application provides services it needs a user. Now I get that.
[19:25] <chandankumar> for a user who wants to transfer data he needs to used the ftp sevice which is associated with work , in order to execute it successfully we need to follow protocol.
[19:25] <chandankumar> any questions till now?
[19:26] <titli> chandankumar, no. It is clear.
[19:26] <chandankumar> command to list all connected device ?
[19:26] <donniezazen> Poornima_: http://fpaste.org/119526/95097514/
[19:26] <CuriousLearner> lsw
[19:26] <CuriousLearner> chandankumar, ^^
[19:27] <iamviknesh> cat /proc/devices , not sure though :P
[19:27] <donniezazen> lsusb for usb devices
[19:27] <Poornima_> donniezazen, thanks alot !
[19:27] <chandankumar> iamviknesh, not such file or directory found
[19:28] <chandankumar> sorry
[19:28] <chandankumar> iamviknesh, yes
[19:28] <chandankumar> all are right
[19:28] <abhiram_rk> lsusb too?
[19:28] <chandankumar> it is better to use lsusb
[19:28] <iamviknesh> chandankumar: so , am i right ?
[19:28] <chandankumar> yes
[19:28] <abhiram_rk> +1
[19:29] <iamviknesh> but lsusb displays only usb port connected
[19:29] <chandankumar> you all have studied file FHS?
[19:29] <sivteck> yes
[19:29] <chandankumar> ok
[19:30] <abhiram_rk> !
[19:30] <chandankumar> next
[19:30] <batul> abhiram_rk please ask your question.
[19:30] <abhiram_rk> FHS as in Filesystem Hierarchy Standard?
[19:30] <chandankumar> next question was command to kill a process.
[19:30] <chandankumar> abhiram_rk, yes
[19:30] <abhiram_rk> chandankumar: +1
[19:30] <chandankumar> can anyone provide the answer of my question?
[19:30] <donniezazen> kill pidof($process)
[19:31] <silentSae> kill pid
[19:31] <abhiram_rk> kill -9 pid
[19:31] <chandankumar> good
[19:31] <iamviknesh>  ps aux | grep <process_name> | kill -9 (or) killall -9 <process_name>
[19:31] <chandankumar> there are two things.
[19:32] <chandankumar> you can kill a process by using pid or its name.
[19:32] <chandankumar> pkill is used to kill process by its name
[19:32] <chandankumar> suppose you have opened multiple windows of firefox.
[19:32] <chandankumar> you call kill easily by pkill firefox.
[19:32] <donniezazen> iamviknesh: you might like pgrep <process_name>
[19:33] <chandankumar> but suppose you have started a program and it is not terminating by pressing CTRL +C
[19:33] <chandankumar> that time we can use kill command
[19:33] <-- zishan ([email protected]) has left this server (Read error: Connection reset by peer).
[19:34] <donniezazen> !
[19:34] <chandankumar> next
[19:34] <batul> donniezazen please ask your question.
[19:34] <iamviknesh> donniezazen: oh thanks :) that was awesome
[19:34] <donniezazen> xkill comes pretty handy when killing gui programs
[19:34] <chandankumar> donniezazen, never tried
[19:35] <chandankumar> donniezazen,  i have learned a new command
[19:35] <chandankumar> xkill
[19:35] <donniezazen> chandankumar: It's funny too it create a skull what you could left click on misbehaving program to kill.
[19:36] <chandankumar> donniezazen, yes
[19:36] <Poornima_> !
[19:36] <chandankumar> next
[19:36] <batul> Poornima_ please ask your question.
[19:37] <chandankumar> now we are going to learn some commands used by us daily.
[19:37] <Poornima_> does xkill kill all the  X sessions
[19:37] <chandankumar> donniezazen, ^^
[19:37] <donniezazen> Poornima_: It kill whatever gui program you left-click on and not the X-session.
[19:38] <donniezazen> Open a terminal type xkill
[19:38] <donniezazen> it will show you a red skull (at least it does that on my KDE box)
[19:38] <iamviknesh> xkill looks good :-D
[19:38] <donniezazen> Then left-click on the same terminal
[19:38] <Poornima_> like ctrl+alt + backspace does kills all the x and restarts the Xserver
[19:39] <donniezazen> that teminal should be now killed.
[19:39] <dhritishikhar_> donniezazen, it doesnot show any red skull. where?
[19:39] <donniezazen> ctrl+alt+backspace? Does that even work now a days.
[19:39] <-- Poornima_ ([email protected]) has left this server (Remote host closed the connection).
[19:39] <donniezazen> dhritishikhar_: Your cursor turns into a skull.
[19:39] <donniezazen> It might be different on different desktop environments.
[19:40] <dhritishikhar_> donniezazen, it doesnot. Mine is just a simple "x". :(
[19:40] <-- thejaman ([email protected]) has left this server (Read error: Connection reset by peer).
[19:40] <dhritishikhar_> ok
[19:40] <chandankumar> Now some home task: explain your committed script in your blog.
[19:40] <rahulmishra> donniezazen: a "cross" for ubuntu i guess.  :(
[19:41] <iamviknesh> dhritishikhar in ubuntu its X
[19:41] <chandankumar> and after explaining add your bitbucket hometask link below.
[19:41] <dhritishikhar_> I am using fedora (cinnamon).
[19:41] <chandankumar> lets try some more commands.
[19:42] <umeshs> dhritishikhar does fedora comes with cinnamon preinstalled?
[19:42] <Poornima_> donniezazen, yes to restart X server you can use ctrl+alt+ Backspace keys
[19:42] <Poornima_> yup xkill is client so it is good command
[19:43] <dhritishikhar_> Umeshs, Yes. You just need to choose the desktop environmnt.
[19:43] <chandankumar> you can watch the last's user activity in your system. -- using last command
[19:43] <umeshs> ok. Thanks.
[19:43] <chandankumar> try it.
[19:43] <donniezazen> http://imgur.com/LWq1sbY This is how it looks on KDE.
[19:44] <Poornima_> chandankumar, where we are suppose to add the home task links ?
[19:44] <donniezazen> !
[19:44] <dhritishikhar_> Poornima_, What do we use ctrl+alt+Backspace keys? When i do it, nothing happens.
[19:44] <chandankumar> next
[19:44] <batul> donniezazen please ask your question.
[19:45] <chandankumar> dhritishikhar_, follow the rules.
[19:45] <Poornima_> dhritishikhar_, which OS you are using
[19:45] <donniezazen> I am not sure what I am seeing here "still logged in" or "still running".
[19:45] <dhritishikhar_> chandankumar, sorry.
[19:45] <chandankumar> right now you are logged in
[19:45] <donniezazen> dhritishikhar_: I don
[19:45] <dhritishikhar_> Poornima_, Fedora (cinnamon)
[19:45] <chandankumar> donniezazen, try last <username>
[19:46] <Poornima_> dhritishikhar_, pm ?
[19:46] <chandankumar> if you have two users in your system
[19:46] <chandankumar> or more than that, you can check their activity.
[19:47] <donniezazen> ah okay it's a list of logged in users.
[19:47] <chandankumar> donniezazen, log out and login through root
[19:47] <chandankumar> and then try
[19:47] <chandankumar> last <username>
[19:48] <chandankumar> we can also find lists of all opened files
[19:48] <silentSae> !
[19:48] <chandankumar> lsof
[19:48] <chandankumar> next
[19:48] <batul> silentSae please ask your question.
[19:48] <silentSae> that's the output of 'last' on my system http://tinypic.com/r/wus7s4/8
[19:49] <silentSae> I'm unable to understand it even after reading the man page, please explain it.
[19:49] <silentSae> <eof>
[19:50] <chandankumar> silentSae, right now it is showing only when your system is rebooted.
[19:50] <silentSae> chandankumar, why so?
[19:50] <chandankumar> silentSae, login as a user and try last <current username>
[19:51] <donniezazen> silentSae: If I do "last donnie | head" it prints something like  "donnie   pts/2        :0               Mon Jul 21 19:49   still logged in" which makes sense as I am still logged in.
[19:51] <chandankumar> you will understand.
[19:51] <silentSae> I'm logged in as amir
[19:51] <umeshs> !
[19:52] <chandankumar> next
[19:52] <batul> umeshs please ask your question.
[19:52] <umeshs> Isn't it wrong that a user is able to see other user's login time for security?
[19:52] <silentSae> donniezazen, I get wtmp begins Tue Jul  1 02:50:05 2014 on "last amir | head"
[19:53] <chandankumar> only a root (super user) can see the activity of other's user.
[19:53] <chandankumar> a normal user cannot.
[19:54] <chandankumar> umeshs, try creating two normal accounts and do something
[19:54] <chandankumar> and then check the output
[19:54] <chandankumar> by logging as a root user.
[19:55] <umeshs> Ok.
[19:55] <chandankumar> You can check the a line description of a command
[19:55] <chandankumar> whatis <command name>
[19:55] <chandankumar> you can also find where a unix command exits using
[19:55] <chandankumar> whereis <command>
[19:56] <chandankumar> done?
[19:56] <chandankumar> like
[19:56] <chandankumar> try
[19:56] <chandankumar> whatis ls
[19:56] <silentSae> yes
[19:56] <chandankumar> and
[19:56] <magzter> got it
[19:56] <chandankumar> whereis ls
[19:56] <silentSae> !
[19:56] <chandankumar> next
[19:56] <batul> silentSae please ask your question.
[19:56] <donniezazen> done
[19:56] <CuriousLearner> !
[19:57] <umeshs> done
[19:57] <abhiram_rk> !
[19:57] <chandankumar> one question from you all , how to create nested directories?
[19:58] <abhiram_rk> chandankumar:  from or for?
[19:58] <bnprk> mkdir -p
[19:58] <chandankumar> good
[19:58] <chandankumar> next
[19:58] <batul> CuriousLearner please ask your question.. abhiram_rk you are next. Get ready with your question.
[19:58] <CuriousLearner> for cd command, whatis shows "cd (1)               - bash built-in commands, see bash(1)" rather than description like the ls command. Why so?
[19:58] <silentSae> I tried logging in as testacc and saw the results of last which were very different but when I logged back in amir and did "last amir" I again got the same results which only show boots
[19:58] <chandankumar> silentSae, are you on fedora or ubuntu?
[19:58] <silentSae> can't understand it still, please help me with it. <eof>
[19:58] * abhiram_rk has the same question as CuriousLearner
[19:58] <silentSae> ubuntu
[19:59] <-- rahulmishra ([email protected]) has left this server (Read error: Connection reset by peer).
[19:59] <chandankumar> silentSae, will check after the class for ubuntu.
[19:59] <chandankumar> next
[19:59] <batul> abhiram_rk please ask your question.
[20:00] <abhiram_rk> whatis on cd gives nothing appropriate on Ubuntu
[20:00] <stguin> abhiram_rk: +1
[20:00] <CuriousLearner> chandankumar, answer to my question?
[20:01] <chandankumar> CuriousLearner, sorry missed
[20:01] <CuriousLearner> chandankumar, for cd command, whatis shows "cd (1)               - bash built-in commands, see bash(1)" rather than description like the ls command. Why so?
[20:02] <chandankumar> CuriousLearner, whatis displays manual pages description of a command
[20:03] <chandankumar> CuriousLearner, sometimes a command have more than one manual pages
[20:03] <chandankumar> so during that time it shows all of them.
[20:03] <chandankumar> next
[20:03] <batul> No one is in queue.
[20:03] <CuriousLearner> ok, thanks :)
[20:04] <chandankumar> now create a nested directory
[20:04] <iamviknesh> abhiram_rk:  seems like a bug https://bugs.launchpad.net/ubuntu/+source/debianutils/+bug/1097911
[20:04] <abhiram_rk> iamviknesh: I see. Okay.
[20:04] <chandankumar> mkdir -p /my/nested/directory
[20:05] <chandankumar> *mkdir -p my/nested/directory
[20:05] <chandankumar> and after that run tree my/
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[20:06] <chandankumar> first will create a nested directory and other will show tree structure of a directory
[20:06] <chandankumar> done?
[20:06] <CuriousLearner> yup
[20:06] <abhiram_rk> installing tree
[20:06] <iamviknesh> yeah
[20:06] <chandankumar> abhiram_rk, ok
[20:06] <titli> yes.
[20:06] <chandankumar> good
[20:06] <silentSae> yes
[20:06] <Prash_542> yes
[20:06] <surabhi> done
[20:06] <chandankumar> Now we are going to compress that directory in terminal
[20:07] <Sparking> yes
[20:07] <magzter> yes
[20:07] <donniezazen> done
[20:08] <chandankumar> create any directory named test
[20:09] <chandankumar> and command the directory using
[20:09] <chandankumar> tar -cvf <directory to compress> <name of the tar file>.tar.gz
[20:10] <stguin> can you please repeat the steps from tree /my
[20:10] <chandankumar> sorry
[20:10] <CuriousLearner> error
[20:10] <stguin> actually i was disconnected from the channel
[20:11] <chandankumar> tar -cvf  <name of the tar file>.tar.gz <directory to compress>
[20:11] <CuriousLearner> Done
[20:11] <chandankumar> tree command is used to see the tree structure view of a directory
[20:11] <chandankumar> and we can extract that directory using
[20:12] <donniezazen> !
[20:12] <sivteck> chandankumar: i think it is tar -czvf to compress
[20:12] <sivteck> for gunzip
[20:13] <chandankumar> tar -xvf <directory name>  <file to extract>
[20:13] <sivteck> tar -cvf just creates an archive
[20:13] <chandankumar> sivteck, yes
[20:14] <donniezazen> sivteck: works fine without -z
[20:14] <chandankumar> sivteck, there are lots of tool to compress in different format.
[20:14] <sivteck> donniezazen: but not compressed
[20:14] <lixxz> donniezazne, it will not compress
[20:14] <chandankumar> next
[20:14] <batul> donniezazen please ask your question.
[20:15] <chandankumar> sivteck, try 7zip
[20:15] <donniezazen> Sorry. No question.
[20:15] <chandankumar> last command of today's class
[20:15] <sivteck> chandankumar: you told to use tar -cvf to compress the directory. ;o
[20:15] <iamviknesh> donniezazen:  it just creates a archive  , wont compress
[20:15] <sivteck> chandankumar: ok
[20:16] <chandankumar> tail will print first 10 lines of a file
[20:16] <chandankumar> try tail /etc/passwd
[20:16] <silentSae> !
[20:16] <chandankumar> next
[20:16] <batul> silentSae please ask your question.
[20:16] <silentSae> http://pastebin.com/JWSe6hhk
[20:17] <silentSae> I get this error trying to create an archive
[20:17] <chandankumar> silentSae, the command is tar -cvf  <name of the tar file>.tar.gz <directory to compress>
[20:17] <sivteck> silentSae: flip the args
[20:18] <silentSae> sorry
[20:18] <chandankumar> you can use tailf <log file name > to see contents of a log file in real time
[20:18] <chandankumar> i hope everybody have got the homework.
[20:18] <azharh> chandankumar, first or last 10 lines (with tail) ?
[20:19] <chandankumar> azharh, yes
[20:19] <lixxz> azharh, last 10
[20:19] <lixxz> head is for first 10
[20:19] <abhiram_rk> last 10
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[20:19] <chandankumar> azharh, first 10 lines
[20:19] <silentSae> chandankumar, please provide it to me. I had to attend to some emergency the other day.
[20:20] <chandankumar> sorry tail is for last 10 lines
[20:20] <chandankumar> lixxz, thanks
[20:20] <lixxz> chandankumar, :)
[20:21] <chandankumar> Home work: Write a blog and explain about your committed scripted in bitbucket form the last home work.
[20:21] <chandankumar> Roll Call
[20:21] <bnprk> Binay Pareek
[20:21] <CuriousLearner> Sanyam Khurana
[20:21] <iamviknesh> Vikneshwar
[20:21] <lixxz> Yasharth
[20:21] <eeshangarg> Eeshan Garg
[20:21] <azharh> Azhar Hussain
[20:21] <surabhi> Surabhi
[20:21] <silentSae> amir
[20:21] <abhiram_rk> Abhiram Ravikumar
[20:21] <Sparking> Bhargav Patel
[20:21] <Poornima_> Poornima Kshirsagar
[20:21] <heena> Heena Kaushar
[20:21] <sivteck> Sivaram Balakrishnan
[20:21] <Prash_542> Prashant Surya
[20:21] <kanika04> kanika narang
[20:21] <shilpi> shilpi shukla
[20:22] <magzter> Mahendra Yadav
[20:22] <harsha> Harsha
[20:22] <chandankumar> please add your script bitbucket link in your blog.
[20:22] <thejaman> Thejazeto
[20:22] <chandankumar> we can check the blogs on planet.dgplug.org/summer <whose blogs are added there>
[20:22] <chandankumar> <------ SESSION ENDED------->