solution:

$ vim /etc/hostname
Ubuntu
$ vim /etc/hosts
127.0.0.1       localhost Ubuntu

use dpkg,a package manager for Ubuntu

To check a specified package:

$ dpkg -s [package name]

To list all packages:

$ dpkg-query -l

default windows,UEFI,only allow to disable secure boot,

• do not have BIOS compatibility mode
• Turn off the machine
• Press the recovery button next to the HDD light.
• Select BIOS Setup
• In configuration,turn off Secure boot,select Reset to Setup Mode.
• Press F10 to save and exit.
• Turn off the machine again,press the recovery button.
• Select Boot Menu
• Select Ubuntu under EFI Boot Devices.

6.3.1 system does not have any USB boot option,please select other boot option in Boot manager menu

keywords: background process,kill

To list all processes:

• ps -ef

From the terminal,ps -ef will list all the processes. See man ps. See man kill,man 2 kill,man killall,man nice,man pkill,man renice,man 7 signal,and man skill to mess with processes. However,simply killing a process that you think is useless may be a mistake. The system might restart the process,or something you depend on might depend on the process you killed. Learn what the processes do,and look at etc/init and /etc/init.d,/etc/rc?.d,man service to see how processes are started by the system.

change image format

eps to pdf > epstopdf package > epstopdf [options] [epsfile]

use avconv

Syntax:

avconv [global options] [[infile options][‘-i’ infile]]... {[outfile options] outfile}

e.g.

avconv -r 10 -start_number 8 -i filename_%d.png -b:v 1000k test.mp4

avconv -i v_%d.png -b:v 1000k veLocity.mp4

i

input file

b

bitrate

https://libav.org/avconv.html https://stackoverflow.com/questions/16315192/avconv-make-a-video-from-a-subset-on-images

To record full screen on a 24 inch monitor:

$byzanz-record --duration=10 -c --width=1920 --height=1080 test1.gif

• 1080p=1920*1080
• coordinates start from the left corner

byzanz-record -d 20 -c -x 0 -y 0 -w 700 -h 550 -v out.gif

where -d : duration : 20 seconds to be recorded -c : cursor also to be recorded -x : left co-ordinate of the recording rectangle -y : right co-ordinate of the recording rectangle -w : width of the recoding rectangle -h : height of the recording rectangle -v : verbose output out.gif : output file name

To launch a terminal $ byzanz-record –help

which returns:

*************
Usage:
  byzanz-record [OPTION...] record your current desktop session

Help Options:
  -?,--help               Show help options
  --help-all               Show all help options
  --help-gtk               Show GTK+ Options

Application Options:
  -d,--duration=SECS      Duration of animation (default: 10 seconds)
  --delay=SECS             Delay before start (default: 1 second)
  -l,--loop               Let the animation loop
  -c,--cursor             Record mouse cursor
  -x,--x=PIXEL            X coordinate of rectangle to record
  -y,--y=PIXEL            Y coordinate of rectangle to record
  -w,--width=PIXEL        Width of recording rectangle
  -h,--height=PIXEL       Height of recording rectangle
  -v,--verbose            Be verbose
  --display=disPLAY        X display to use
****************

Three shell scripts:

1. byzanz-record-window –> to select a window for recording
2. byzanz-record-region –> to select a part of the screen for recording
3. a simple GUI front-end for 1,by MHC

https://askubuntu.com/questions/107726/how-to-create-animated-gif-images-of-a-screencast/

https://wiki.ubuntu.com/CreatingScreencasts

use pdftk package

pdftk full-pages.pdf cat 1 output outfile_1.pdf

in the above command,input file is full-pages.pdf,you extract page 1 and save it as outfile_1.pdf

https://www.mendeley.com/guides/download-mendeley-desktop/ubuntu/instructions

linux lite

Lubuntu

sudo add-apt-repository ppa:deadsnakes/ppa

sudo apt-get update

sudo apt-get install python3.6

https://askubuntu.com/questions/865554/how-do-i-install-python-3-6-using-apt-get

https://www.gnu.org/software/octave/

you-get package To upgrade you-get: > $ pip3 install –upgrade you-get

e.g.

$ you-get -i ‘https://www.youtube.com/watch?v=jNQXAC9IVRw‘

then you can see all formats and their corresponding tags,download a specified video format.

$ you-get –itag=18 ‘https://www.youtube.com/watch?v=jNQXAC9IVRw‘

download a BitTorrent https://help.ubuntu.com/community/TransmissionHowTo#Transmission

Okular set default pdf viewer

sudo add-apt-repository ppa:webupd8team/tor-browser

sudo apt-get update

sudo apt-get install tor-browser https://www.linuxbabe.com/desktop-linux/install-tor-browser-on-ubuntu-16-04-via-ppa

8.10.1 office 365

8.10.2 add Gmail account to thunderbird

1. Open Thunderbird.
2. From the Application menu,choose Add Account…
3. Input your account information,choose Options… then Account Settings…
4. Click the Account Actions button,then choose Add Mail Account…
5. Input your account information.
6. Click Continue.
7. Click Manual config.
8. Set the Incoming settings as follows:

   a. Server hostname: imap-mail.outlook.com. (smtp.office365.com)

   b. Port: 993.

   c. SSL: SSL/TLS.

   d. Authentication: normal password.

1. Set the Outgoing settings as follows:

   a. Server hostname: smtp-mail.outlook.com. (smtp.office365.com)

   b. Port: 587.

   c. SSL: STARTTLS.

   d. Authentication: normal password.

1. Click Done.

For more information on connecting your app to outlook.com,visit this link: http://windows.microsoft.com/en-us/windows/outlook/send-receive-from-app.

1. Start your Thunderbird client.
2. Go to Tools and then Account Settings…
3. Select Account Actions and then Add Mail Account…
4. Enter Your name and your QMUL Email address (eg [email protected]) and QMUL Password.
5. Don’t forget to tick the Remember password option before clicking Continue.
6. If successful you will be able to click Done to complete the email set up and start using your account.
7. Thunderbird may not automatically find the settings and the following error message will appear:

‘Thunderbird Failed to find the settings for your email account.‘

1. Amend Incoming IMAP server hostname to ‘outlook.office365.com’ and Outgoing SMTP to ‘smtp.office365.com’.
2. Change the Incoming port to 993 and the Outgoing port to 587.
3. Change the Incoming SSL to ‘SSL/TLS’ and the Authentication to ‘normal Password’,and the Outgoing SSL to ‘Autodetect’ and Authentication to ‘Autodetect’.
4. Amend the entry for Username to your QMUL username including the ‘@qmul.ac.uk‘ suffix (eg [email protected]).
5. Click Re-Test.

13 .Click Done to complete the email set up and start using your account.

http://www.its.qmul.ac.uk/support/self-help/email_setup/settingupemail/thunderbird/

1. install fcitx

sudo apt install fcitx fcitx-googlepinyin

1. After that,launch Language Support utility and select use Fcitx:
2. Finally restart your computer and you’ll see a keyboard icon in panel. Go to Configure (see menu in the top picture) and do:

   click the bottom left plus icon. uncheck “show current language” scroll down and choose an IM you want finally click OK.

Install fcitx > sudo apt install fcitx fcitx-googlepinyin fcitx-table-wbpy fcitx-pinyin fcitx-sunpinyin

http://ubuntuhandbook.org/index.php/2016/07/2-best-chinese-pinyin-im-ubuntu-16-04/

https://www.linuxbabe.com/ubuntu/install-resilio-sync-ubuntu-16-04-16-10

To reset login and password settings,follow these steps:

1. Quit Sync and close WebUI.
2. Go to the Sync storage folder Linux packages:

var/lib/resilio-sync if launched as default rslsync user. /home/username.config/resilio-sync/storage if launched as current user.

1. Locate and remove the following files:

settings.dat settings.dat.old

1. Once the files are removed,restart Sync,open WebUI and enter your new login and password.

make

a build automation tool that automatically builds

executable programs and libraries from source code

dpkg

a package manager for Debian-based systems.

It can install,remove,and build packages,but unlike other package management systems,it cannot automatically download and install packages or their dependencies.

(no term)

you can install a local .deb ile by entering:

sudo dpkg -i example.deb

Change=example.deb=to the actual file name of the local .deb file you wish to install.

2 . Uninstalling a package can be accomplished by:

sudo dpkg -r zip

Uninstalling packages using dpkg,in most cases,is NOT recommended. It is better to use a package manager that handles dependencies to ensure that the system is in a consistent state. For example using dpkg -r zip will remove the zip package,but any packages that depend on it will still be installed and may no longer function correctly.

https://help.ubuntu.com/lts/serverguide/dpkg.html.en

>f95 wake_tudk.f dyn_aero.f #compile TUDK model >f95 wake_gh.f dyn_aero.f # GH model

extension: .sh

I have a script called foo.sh in my home folder.

When I navigate to this folder,and enter ./foo.sh,I get

-bash: ./foo.sh: Permission denied.

When I use sudo ./foo.sh,I get

sudo: foo.sh: command not found.

Why does this happen and how I can fix it?

If your btsync is run by the user named btsync,you should actually add your folder‘s owner to btsync:

chown -R btsync folder_name

Or if you‘re using resilio you should change folder owner to relsync:

chown -R rslsync folder_name