What is the function of linux deploy

## Because we are logging in through ordinary users android System, next we need to set the super user (root) password and log in to the system as the super user:

Type in the terminal:

sudo passwd root

The terminal will prompt the user to enter the password of the root user and enter it again to confirm (the password will not be visible when entering the password, and even * will not be displayed). After the setting is completed, type the command su in the terminal and enter the root user you just set. Password to switch to the root user.

File management: If you deploy the Linux system through the "directory" method, then you can directly use the R.E. manager to access /data/user/0/ru.meefik.linuxdeploy/env/rootfs/linux You can manage the files in the new system. If you deploy the Linux system through the "file" method, you have to rely on SFTP to manage files and other operations (of course there is no problem using SSH, but I still think SFTP is more convenient. ). When we log in to SFTP as a normal user, we do not have permission to operate most files due to permission reasons. So we need to log in to SFTP as superuser. However, the default configuration does not allow the root user to log in to SSH and SFTP, so we need to make the following settings:

Start the deployed system in Linux Deploy, log in to SSH as the android user, and execute in the terminal:

sudo apt-get install -y vim #Install vim editor

Of course, you can also use the vi editor that comes with the system. If you are familiar with the vi editor, you can also use it. vi editor to edit files. After the vim editor is installed, we continue to execute in the terminal:

vim /etc/ssh/sshd_config #Use the vim editor to open the /etc/ssh/sshd_config file

After opening the file, type i Enter the editing mode, click on any blank position of the terminal to pop up the special key keyboard, use the up and down cursors to scroll through the file, find the PermitRootLogin item in the #Authentication section of the file, change it to yes, after the change is completed, click on the special key keyboard "ESC" key to exit the editing mode, type: wq! on the keyboard to save and force exit the file to complete the editing operation of the file.

Open Linux Deploy, stop and then start the Linux system. Open "Turbo Client" - Sidebar - Create a new account - SFTP to create a new SFTP connection (some file managers, such as ES File Explorer (ESFile Explorer) and SE File Manager (Solid Explorer) also have SFTP functions, If you don’t want to install TurboFTP, you can use them instead):

External storage/linux.img, and then uninstall Linux Deploy and restart your phone to completely uninstall.

Install the graphical environment

Copy

vncserver command, the system will ask you to set a VNC password less than 8 digits. You need to enter the password twice and submit it. , there will be a prompt after the VNC password setting is completed, ignore it, type n to submit)

Enter the graphical interface:

New 'X' desktop is localhost:1The desktop session number is specified as 1, so the port is 5900 1=5901. If we open multiple virtual desktops and their session numbers are 2, 3, 4..., then their respective ports are 5902, 5903, 5904... and so on. Moreover, the server address and port need to be separated by an English colon. The "Name" item is the address specified by the user for this VNC session. In order to distinguish it from other sessions, we fill in Localhost - Ubuntu@Xfce. In fact, you can fill in anything you want.

## After confirming that the information is correct, click the green "CONNECT" button below to start connecting to the VNC session (if you have not set a VNC password before, you still need to enter it during the VNC connection process password, then you can try entering the password of the android user):

Possible problems:

rm -rf /tmp/.X11-unix/X[1-9]

vncserver again, and the session number will be reset to 1. In order to prevent this problem caused by stopping and restarting the Linux system every time, we can edit the /etc/rc.local file and insert these two commands before exit 0 in this file:

## After editing is completed, save it. After performing this step, Linux Deploy will execute these two commands for us after starting the Linux system and before stopping the Linux system, so that no more errors will be reported~

　2. vncserver default The resolution is 1024×768, but the resolution of most mobile phone screens on the market is 720P (1280×720), 1080P (1920×1080), or even 2K (2560×1440). The default resolution of vncserver is 1024×768. It may be the case that the VNC image cannot fill the screen. At this time, we need to modify the VNC resolution to adapt to the screen. After testing, taking the 1080P screen as an example, setting the resolution to 720P can make the VNC image fill the screen and not fit the screen. affect the display effect. The adjustment method is to add the

parameter after each execution of the vncserver command. For example, if I need to adjust the VNC resolution to 720P (1280×720), then start vncserver , execute: vncserver -geometry 1280x720

to set the screen resolution of the newly opened VNC virtual session to 1280×720. It is worth noting that the

in 1280x720 in the command is the lowercase letter x, not the multiplication sign × in mathematics. The following is a comparison between 1280×720 resolution and 1024×768 resolution (reducing the VNC Viewer screen to the minimum):

Obviously, on a 1080P screen, setting the VNC resolution to 1280×720 can make the image fill the screen and provide better visual effects. .

If you find it a bit troublesome to enter such a long list of commands every time you start vncserver, you can edit the

file and add a line of alias definition at the location shown in the figure below: vim ~/.bashrc #Edit~/.bashrc

alias vncserver='vncserver -geometry 1280x720'

After that, every time the

command is executed, the resolution of the newly opened VNC session will be set to 1280×720. <h3 id="strong-Upgrading-ubuntu-strong"><strong>Upgrading ubuntu</strong></h3> <p data-pid="mGD1_aOi">You will find that ubuntu can only be installed to 18.04</p> <p data-pid="VAMIrQXy">The way to upgrade is to install Ubuntu and then upgrade directly. </p> <p data-pid="kkln5K-O">After logging into the desktop using VNC, use the terminal to install the updater</p><pre class='brush:php;toolbar:false;'>sudo apt install update-manager-core</pre><p data-pid="60gRnUq3">Update all packages to the latest version</p><pre class='brush:php;toolbar:false;'>sudo apt update &amp;&amp; sudo apt upgrade sudo do-release-upgrade</pre><p data-pid="vbrcayHf">If authenticate 'focal.tar.gz' against ' appears focal.tar.gz.gpg' Authentication failed error, first install gnupg and execute the following instructions: </p><pre class='brush:php;toolbar:false;'>sudo apt install gnupg gnupg1 gnupg2 sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 871920D1991BC93C</pre><h4 id="Execute-sudo-do-release-upgrade-again-enter-y-to-start-updating-the-system-and-follow-the-terminal-instructions-to-update">Execute sudo do-release-upgrade again, enter y to start updating the system, and follow the terminal instructions to update. </h4><p data-pid="AHGX18es">If prompted Please Install All Available Updates Before Upgrading</p><pre class='brush:php;toolbar:false;'>apt clean apt autoclean sudo apt update sudo apt upgrade -y sudo apt dist-upgrade</pre><h4 id="Execute-sudo-do-release-upgrade-again-enter-y-to-start-updating-the-system-and-follow-the-terminal-instructions-to-update">Execute sudo do-release-upgrade again, enter y to start updating the system, and follow the terminal instructions to update. </h4><p data-pid="UIeefVlm">If nothing else goes wrong, the system has been upgraded normally. </p><p data-pid="sw0Qe6Hi">After the upgrade, you need to go back to the linux deploy configuration item and change the username to root. The password can remain unchanged. The reason is that after the upgrade, the original android username does not have root permissions</p><blockquote data-pid="Q8L66PKi">After modifying the user name, be sure to click the configuration option of linux deploy to reconfigure</blockquote><p data-pid="7_t4ca32"><strong># Updated on 2023.3.8 If you encounter "The required dependency 'apt (>= 2.0.4)' is not installed." Need to modify the /etc/apt/source.list file</strong></p><pre class='brush:php;toolbar:false;'>## /etc/apt/source.list deb http://ports.ubuntu.com/ focal multiverse main universe deb-src http://ports.ubuntu.com/ focal multiverse main universe deb http://ports.ubuntu.com/ focal-updates main universe multiverse deb-src http://ports.ubuntu.com/ focal-updates main universe multiverse deb http://ports.ubuntu.com/ focal-security main universe multiverse deb-src http://ports.ubuntu.com/ focal-security main universe multiverse</pre>

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