Connect to android device screen from ubuntu pc

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Scrcpy is a software to connect to your android device (phone or tablet) from your ubuntu pc.

It is really fast and stable.All you have to do is install the software with using apt

$ sudo apt install scrcpy

and then connect your android device to your pc via usb cable.Enable adb usb debugging.and run the tool

$ scrcpy
INFO: scrcpy 1.12.1 <https://github.com/Genymobile/scrcpy>
/usr/share/scrcpy/scrcpy-server: 1 file pushed. 7.9 MB/s (24773 bytes in 0.003s)
INFO: Initial texture: 1080x1920

and Thumbs up! they really made a good software.I appreciate.Thanks to Genymobile!

Github page https://github.com/Genymobile/scrcpy

Most Used Linux Commands For File Compression

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Gzip

Compress a file with gzip

$ gzip filename

Compress and keep the original file

$ gzip -c file > file.gz

Compress all files in a folder

$ gzip -r foldername

Tar.gz

$ tar -czvf filename.tar.gz directory

ZSTD Compression

Install first the package,

$ sudo apt install zstd (Debian/Ubuntu)

$ dnf install zstd (Centos,AlmaLinux,Fedora,Redhat)

Usage:

to compress a file :

zstd example.txt

Using with tar:

tar --zstd example.tar.zst example/

ZSTD Uncompression

tar --use-compress-program=unzstd -xvf archive.tar.zst

 

PwnKit Local Privilege Escalation Vulnerability polkit’s pkexec (CVE-2021-4034)

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A memory corruption vulnerability (CVE-2021-4034) in PolKit, a component used in major Linux distributions and some Unix-like operating systems, can be easily exploited by local unprivileged users to gain full root privileges.

PolKit vulnerability can give attackers root on many Linux distros (CVE-2021-4034)

https://blog.qualys.com/vulnerabilities-threat-research/2022/01/25/pwnkit-local-privilege-escalation-vulnerability-discovered-in-polkits-pkexec-cve-2021-4034

Patch for Ubuntu is Available

https://ubuntu.com/security/notices/USN-5252-1

If you don’t have any patch please remove suid bit from pxexec tool with this command

chmod 0755 /usr/bin/pkexec