If you want to install the Unity 3D software on Fedora 31 Linux distro then you can read my tutorial from this webpage.
To run Unity software you need to have one good hardware.
This install require to upload the license file even you use a free or pro license.
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Tuesday, February 25, 2020
Tuesday, February 18, 2020
Fedora 31 : The Fyne UI toolkit for Go programming language.
Today I will show you how to use a UI toolkit with the Go programming. language.
The development team comes with this toolkit at the GitHub official webpage.
Fyne is an easy to use UI toolkit and app API written in Go. It is designed to build applications that run on desktop and mobile devices with a single codebase...
Fyne is an easy to use UI toolkit and app API written in Go. It is designed to build applications that run on desktop and mobile devices with a single codebase...
[mythcat@desk ~]$ sudo dnf install golang
[sudo] password for mythcat:
...
Installed:
golang-1.13.6-1.fc31.x86_64 golang-bin-1.13.6-1.fc31.x86_64
golang-src-1.13.6-1.fc31.noarch mercurial-4.9-2.fc31.x86_64
Complete! [root@desk mythcat]# dnf install libX11-devel libXcursor-devel libXrandr-devel libXinerama-devel
mesa-libGL-devel libXi-devel
Last metadata expiration check: 0:04:28 ago on Sun 16 Feb 2020 12:25:04 PM EET.
Package libX11-devel-1.6.9-2.fc31.x86_64 is already installed.
Package mesa-libGL-devel-19.2.8-1.fc31.x86_64 is already installed.
Package libXi-devel-1.7.10-2.fc31.x86_64 is already installed.
Dependencies resolved.
...
Installed:
libXcursor-devel-1.1.15-6.fc31.x86_64 libXinerama-devel-1.1.4-4.fc31.x86_64
libXrandr-devel-1.5.2-2.fc31.x86_64 libXrender-devel-0.9.10-10.fc31.x86_64
Complete! [mythcat@desk ~]$ go get fyne.io/fyne
[mythcat@desk ~]$ go get fyne.io/fyne/cmd/fyne_demo/[mythcat@desk ~]$ go run /home/mythcat/go/src/fyne.io/fyne/cmd/fyne_demo/main.go Sunday, February 16, 2020
Fedora 31 : Can be better? part 006.
I try to use the Selinux MLS with Fedora 31 and I wrote on my last article about Fedora 31 : Can be better? part 005.
After relabeling the files and start the environment I get multiple errors and I ask an answer at fedoraproject lists:
This is an example of the problem of implementing MLS in Fedora and can be remedied because MLS Selinux is old in implementing Selinux.
SELinux is preventing su from open access on the file /var/log/lastlog.
***** Plugin catchall (100. confidence) suggests **************************
If you believe that su should be allowed open access on the lastlog file by default.
Then you should report this as a bug.
You can generate a local policy module to allow this access.
Do
allow this access for now by executing:
# ausearch -c 'su' --raw | audit2allow -M my-su
# semodule -X 300 -i my-su.pp [root@desk mythcat]# ausearch -c 'su' --raw | audit2allow -M my-su
compilation failed:
my-su.te:36:ERROR 'syntax error' at token 'mlsconstrain' on line 36:
mlsconstrain file { write create setattr relabelfrom append unlink link rename mounton } ((l1 eq l2 -Fail-)
or (t1 == mlsfilewritetoclr -Fail-) and (h1 dom l2 -Fail-) and (l1 domby l2) or (t2 ==
mlsfilewriteinrange -Fail-)
and (l1 dom l2 -Fail-) an
# mlsconstrain file { read getattr execute } ((l1 dom l2 -Fail-) or (t1 ==
mlsfilereadtoclr -Fail-)
and (h1 dom l2 -Fail-) or (t1 == mlsfileread -Fail-) or (t2 == mlstrustedobject -Fail-) ); Constraint DENIED
/usr/bin/checkmodule: error(s) encountered while parsing configuration
[root@desk mythcat]# ausearch -c 'su' --raw | audit2allow -M my-su
compilation failed:
my-su.te:36:ERROR 'syntax error' at token 'mlsconstrain' on line 36:
mlsconstrain file { write create setattr relabelfrom append unlink link rename mounton } ((l1 eq l2 -Fail-)
or (t1 == mlsfilewritetoclr -Fail-) and (h1 dom l2 -Fail-) and (l1 domby l2) or (t2 ==
mlsfilewriteinrange -Fail-)
and (l1 dom l2 -Fail-) an
# mlsconstrain file { read getattr execute } ((l1 dom l2 -Fail-) or (t1 ==
mlsfilereadtoclr -Fail-)
and (h1 dom l2 -Fail-) or (t1 == mlsfileread -Fail-) or (t2 == mlstrustedobject -Fail-) ); Constraint DENIED
/usr/bin/checkmodule: error(s) encountered while parsing configuration...Tuesday, February 11, 2020
Fedora 31 : Install the drawing GNOME with DNF and flatpak.
You can use the DNF tool:
[root@desk mythcat]# dnf search gnome | grep drawing
Last metadata expiration check: 1:53:53 ago on Tue 11 Feb 2020 05:28:15 PM EET.
drawing.noarch : Drawing application for the GNOME desktop
[root@desk mythcat]# dnf install drawing.noarch
Last metadata expiration check: 1:54:28 ago on Tue 11 Feb 2020 05:28:15 PM EET.
Dependencies resolved.
================================================================================
Package Architecture Version Repository Size
================================================================================
Installing:
drawing noarch 0.4.9-1.fc31 updates 1.0 M
Transaction Summary
================================================================================
Install 1 Package
Total download size: 1.0 M
Installed size: 1.5 M
Is this ok [y/N]: y
Downloading Packages:
drawing-0.4.9-1.fc31.noarch.rpm 1.4 MB/s | 1.0 MB 00:00
--------------------------------------------------------------------------------
Total 601 kB/s | 1.0 MB 00:01
Running transaction check
Transaction check succeeded.
Running transaction test
Transaction test succeeded.
Running transaction
Preparing : 1/1
Installing : drawing-0.4.9-1.fc31.noarch 1/1
Running scriptlet: drawing-0.4.9-1.fc31.noarch 1/1
Verifying : drawing-0.4.9-1.fc31.noarch 1/1
Installed:
drawing-0.4.9-1.fc31.noarch
Complete![root@desk mythcat]# dnf install flatpak
Last metadata expiration check: 1:47:49 ago on Tue 11 Feb 2020 05:28:15 PM EET.
Dependencies resolved.
================================================================================
Package Arch Version Repository Size
================================================================================
Installing:
flatpak x86_64 1.4.3-3.fc31 updates 1.1 M
Installing dependencies:
flatpak-selinux noarch 1.4.3-3.fc31 updates 24 k
flatpak-session-helper x86_64 1.4.3-3.fc31 updates 72 k
Installing weak dependencies:
p11-kit-server x86_64 0.23.20-1.fc31 updates 186 k
xdg-desktop-portal x86_64 1.4.2-3.fc31 fedora 386 k
xdg-desktop-portal-gtk x86_64 1.4.0-1.fc31 fedora 212 k
Transaction Summary
================================================================================
Install 6 Packages
Total download size: 1.9 M
Installed size: 7.7 M
Is this ok [y/N]: y
...
Installed:
flatpak-1.4.3-3.fc31.x86_64
flatpak-selinux-1.4.3-3.fc31.noarch
flatpak-session-helper-1.4.3-3.fc31.x86_64
p11-kit-server-0.23.20-1.fc31.x86_64
xdg-desktop-portal-1.4.2-3.fc31.x86_64
xdg-desktop-portal-gtk-1.4.0-1.fc31.x86_64
Complete! [mythcat@desk ~]$ flatpak remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo
Note that the directories
'/var/lib/flatpak/exports/share'
'/home/mythcat/.local/share/flatpak/exports/share'
are not in the search path set by the XDG_DATA_DIRS environment variable, so
applications installed by Flatpak may not appear on your desktop until the
session is restarted.[mythcat@desk ~]$ flatpak install flathub com.github.maoschanz.drawing
Note that the directories
'/var/lib/flatpak/exports/share'
'/home/mythcat/.local/share/flatpak/exports/share'
are not in the search path set by the XDG_DATA_DIRS environment variable, so
applications installed by Flatpak may not appear on your desktop until the
session is restarted.
Looking for matches…
Required runtime for com.github.maoschanz.drawing/x86_64/stable (runtime/org.gnome.Platform/x86_64/3.34)
found in remote flathub
Do you want to install it? [Y/n]: Y
com.github.maoschanz.drawing permissions:
ipc wayland x11
ID Arch Branch Remote Download
1. [✓] org.gnome.Platform x86_64 3.34 flathub 304.2 MB / 318.5 MB
2. [✓] org.gnome.Platform.Locale x86_64 3.34 flathub 16.8 kB / 322.0 MB
3. [✓] org.freedesktop.Platform.GL.default x86_64 19.08 flathub 92.6 MB / 92.6 MB
4. [✓] org.freedesktop.Platform.VAAPI.Intel x86_64 19.08 flathub 8.7 MB / 8.7 MB
5. [✗] org.freedesktop.Platform.openh264 x86_64 19.08 flathub 594.2 kB / 593.4 kB
6. [✓] com.github.maoschanz.drawing x86_64 stable flathub 1.0 MB / 1.1 MB
7. [✓] com.github.maoschanz.drawing.Locale x86_64 stable flathub 1.7 kB / 86.2 kB
Warning: org.freedesktop.Platform.openh264 not installed
Installation complete.
[mythcat@desk ~]$ flatpak install org.freedesktop.Platform/x86_64/19.08
Note that the directories
'/var/lib/flatpak/exports/share'
'/home/mythcat/.local/share/flatpak/exports/share'
are not in the search path set by the XDG_DATA_DIRS environment variable, so
applications installed by Flatpak may not appear on your desktop until the
session is restarted.
Looking for matches…
Found similar ref(s) for ‘org.freedesktop.Platform/x86_64/19.08’ in remote ‘flathub’ (system).
Use this remote? [Y/n]: Y
ID Arch Branch Remote Download
1. [✓] org.freedesktop.Platform x86_64 19.08 flathub 11.5 MB / 238.1 MB
2. [✓] org.freedesktop.Platform.Locale x86_64 19.08 flathub 16.7 kB / 318.2 MB
3. [✓] org.freedesktop.Platform.openh264 x86_64 19.08 flathub 593.6 kB / 593.4 kB
Installation complete. [mythcat@desk ~]$ flatpak run com.github.maoschanz.drawingSunday, February 2, 2020
Fedora 31 : Can be better? part 005.
Today we have once again dealt with this topic on the possibilities of improving the Fedora distro.
This time the adventure turned to the Selinux system switching to SELinux MLS.
Let's test the SELinux Fedora 31 from default targeted to mls.
First let's see the users:
After I boot and relabel all files I got errors about Gtk-Messages.
I remove my old Cinnamon with this command:
First, these alerts are more than 250.
After I fix some of these now I see only 50.
I think this problem with changing the SELinux type can be improved.
This time the adventure turned to the Selinux system switching to SELinux MLS.
Let's test the SELinux Fedora 31 from default targeted to mls.
First let's see the users:
[root@desk mythcat]# semanage user -l
Labeling MLS/ MLS/
SELinux User Prefix MCS Level MCS Range SELinux Roles
guest_u user s0 s0 guest_r
root user s0 s0-s0:c0.c1023 staff_r sysadm_r system_r unconfined_r
staff_u user s0 s0-s0:c0.c1023 staff_r sysadm_r system_r unconfined_r
sysadm_u user s0 s0-s0:c0.c1023 sysadm_r
system_u user s0 s0-s0:c0.c1023 system_r unconfined_r
unconfined_u user s0 s0-s0:c0.c1023 system_r unconfined_r
user_u user s0 s0 user_r
xguest_u user s0 s0 xguest_r[root@desk mythcat]# vim /etc/selinux/config
# This file controls the state of SELinux on the system.
# SELINUX= can take one of these three values:
# enforcing - SELinux security policy is enforced.
# permissive - SELinux prints warnings instead of enforcing.
# disabled - No SELinux policy is loaded.
SELINUX=enforcing
# SELINUXTYPE= can take one of these three values:
# targeted - Targeted processes are protected,
# minimum - Modification of targeted policy. Only selected processes are protected.
# mls - Multi Level Security protection.
SELINUXTYPE=targeted
#SELINUX=enforcing
SELINUX=permissive
...
#SELINUXTYPE=targeted
SELINUXTYPE=mls[root@desk mythcat]# dnf search mls | grep selinux
Last metadata expiration check: 2:45:09 ago on Sun 02 Feb 2020 01:28:54 PM EET.
selinux-policy-mls.noarch : SELinux mls base policy
[root@desk mythcat]# dnf install selinux-policy-mls.noarch
...
Installed:
mcstrans-2.9-2.fc31.x86_64
policycoreutils-newrole-2.9-5.fc31.x86_64
selinux-policy-mls-3.14.4-45.fc31.noarch
Complete![mythcat@desk ~]$ setenforce 0
[mythcat@desk ~]$ getenforce
Permissive
...
[root@desk mythcat]# touch /.autorelabel
[root@desk mythcat]# rebootAfter I boot and relabel all files I got errors about Gtk-Messages.
I remove my old Cinnamon with this command:
[root@desk mythcat]# dnf groupremove -y "Cinnnamon"[root@desk mythcat]# dnf grouplist -v dnf groupinstall -y "MATE Desktop" --allowerasing[mythcat@desk ~]$ sudo systemctl restart lightdm.serviceFirst, these alerts are more than 250.
After I fix some of these now I see only 50.
I think this problem with changing the SELinux type can be improved.
Fedora 31 : Using the dmesg command on Linux operating system.
The dmesg command is used to display the kernel-related messages on Unix like systems.
Today I will show you how to use this command on the Linux operating system.
Simply use the command:
[mythcat@desk ~]$ dmesg
[ 0.000000] microcode: microcode updated early to revision 0x21, date = 2019-02-13
...[mythcat@desk ~]$ dmesg | less
... [mythcat@desk ~]$ dmesg | grep -i memory
...
[mythcat@desk ~]$ dmesg | grep -i dma
...
[mythcat@desk ~]$ dmesg | grep -i usb
...
[mythcat@desk ~]$ dmesg | grep -i tty
...[mythcat@desk ~]$ dmesg | grep -E "memory|dma|usb|tty"[root@desk mythcat]# dmesg --level=err,warn- kern - kernel messages;
- user - random user-level messages;
- mail - mail system;
- daemon - system daemons;
- auth - security/authorization messages;
- syslog - messages generated internally by syslogd;
- lpr - line printer subsystem;
- news - network news subsystem;
[mythcat@desk ~]$ dmesg --facility=daemon[root@desk mythcat]# dmesg -C# dmesg -L