I'm new to ubuntu and installed Ubuntu 22.04.2 LTS 64-bit and Gnome version 42.5. I installed linux alongside windows. The ubuntu version is required by my instructor in college.
But when I tried to install something using GUI or terminal the problem started to come in. For example, I can't open 'Ubuntu Software' now, I used to open it yesterday but it's not displayed normally either and when I clicked on anything, the software centre simply crashed.
Things I've done on my ubuntu: install a theme follow https://itsfoss.com/best-gtk-themes/. install a deepin-wine on https://github.com/zq1997/deepin-winehttps://github.com/zq1997/deepin-wine to install a wechat.
By the way, because I'm in mainland China, I have to set up a proxy, I set the network proxy with 'Manual' -> HTTP Proxy: 127.0.0.1; 7890 /// HTTPs Proxy: 127.0.0.1; 7890. I don't if this is the right way because I have no prior experience. But I can access all foreign websites like youtube now which are not accessible without proxy. The server from Tsinghua I added in the following trials is also recommended by my instructor but it does not work normally.
I cannot install things in terminal either. For example, if I type
sudo apt install wine
the terminal tells me
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
wine : Depends: wine64 (>= 6.0.3~repack-1) but it is not going to be installed or
wine32 (>= 6.0.3~repack-1)
Depends: wine64 (< 6.0.3~repack-1.1~) but it is not going to be installed or
wine32 (< 6.0.3~repack-1.1~)
E: Unable to correct problems, you have held broken packages.
In software&Update, I enable the first four options and download from the server from Malaysia that performs best in the test provided by ubuntu. And in the second section Sorry I don't have a decent screenshot software because I can't install any either
I may have done something inproper that remove some of the servers by accident.
If I type in
$ cat /etc/apt/sources.list
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy main restricted universe multiverse
deb http://my.mirrors.thegigabit.com/ubuntu/ jammy main universe restricted multiverse
I have also installed the following packages successfully according to instructor's requirements (with sudo):
apt-get install build-essential # build-essential packages, include binary utilities, gcc, make, and so on
apt-get install man # on-line reference manual
apt-get install gcc-doc # on-line reference manual for gcc
apt-get install gdb # GNU debugger
apt-get install git # revision control system
apt-get install libreadline-dev # a library used later
apt-get install libsdl2-dev # a library used later
apt-get install llvm llvm-dev # llvm project, which contains libraries used later
apt-get install llvm-11 llvm-11-dev # only for ubuntu20.04
Solutions provided by other posts that I've tried:
~$ sudo apt-get --purge --reinstall install software-center
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Package software-center is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
E: Package 'software-center' has no installation candidate
$ sudo apt clean
$ sudo apt update && sudo apt upgrade
Hit:1 http://my.mirrors.thegigabit.com/ubuntu jammy InRelease
Hit:2 http://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy InRelease
Hit:3 https://dl.google.com/linux/chrome/deb stable InRelease
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
All packages are up to date.
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Calculating upgrade... Done
Get more security updates through Ubuntu Pro with 'esm-apps' enabled:
libavcodec-extra libavdevice58 ffmpeg libpostproc55 libavcodec-extra58
libavutil56 libswscale5 libswresample3 libavformat58 libavfilter7
Learn more about Ubuntu Pro at https://ubuntu.com/pro
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
$ sudo apt autoremove gnome-software && sudo apt install gnome-software
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
The following packages will be REMOVED:
gnome-software gnome-software-common gnome-software-plugin-snap
0 upgraded, 0 newly installed, 3 to remove and 0 not upgraded.
After this operation, 3,251 kB disk space will be freed.
Do you want to continue? [Y/n] y
(Reading database ... 241694 files and directories currently installed.)
Removing gnome-software-plugin-snap (41.5-2) ...
Removing gnome-software (41.5-2) ...
Removing gnome-software-common (41.5-2) ...
Processing triggers for hicolor-icon-theme (0.17-2) ...
Processing triggers for gnome-menus (3.36.0-1ubuntu3) ...
Processing triggers for libglib2.0-0:amd64 (2.72.1-1) ...
Processing triggers for libglib2.0-0:i386 (2.72.1-1) ...
Processing triggers for libc-bin (2.35-0ubuntu3.1) ...
Processing triggers for man-db (2.10.2-1) ...
Processing triggers for mailcap (3.70+nmu1ubuntu1) ...
Processing triggers for desktop-file-utils (0.26-1ubuntu3) ...
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
The following additional packages will be installed:
gnome-software-common gnome-software-plugin-snap
Suggested packages:
gnome-software-plugin-flatpak
The following NEW packages will be installed:
gnome-software gnome-software-common gnome-software-plugin-snap
0 upgraded, 3 newly installed, 0 to remove and 0 not upgraded.
Need to get 655 kB of archives.
After this operation, 3,251 kB of additional disk space will be used.
Do you want to continue? [Y/n] y
Get:1 http://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy/universe amd64 gnome-software-common all 41.5-2 [20.3 kB]
Get:2 http://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy/universe amd64 gnome-software amd64 41.5-2 [606 kB]
Get:3 http://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy/universe amd64 gnome-software-plugin-snap amd64 41.5-2 [28.8 kB]
Fetched 655 kB in 2s (305 kB/s)
Selecting previously unselected package gnome-software-common.
(Reading database ... 241633 files and directories currently installed.)
Preparing to unpack .../gnome-software-common_41.5-2_all.deb ...
Unpacking gnome-software-common (41.5-2) ...
Selecting previously unselected package gnome-software.
Preparing to unpack .../gnome-software_41.5-2_amd64.deb ...
Unpacking gnome-software (41.5-2) ...
Selecting previously unselected package gnome-software-plugin-snap.
Preparing to unpack .../gnome-software-plugin-snap_41.5-2_amd64.deb ...
Unpacking gnome-software-plugin-snap (41.5-2) ...
Setting up gnome-software-common (41.5-2) ...
Setting up gnome-software (41.5-2) ...
Processing triggers for desktop-file-utils (0.26-1ubuntu3) ...
Processing triggers for hicolor-icon-theme (0.17-2) ...
Processing triggers for gnome-menus (3.36.0-1ubuntu3) ...
Processing triggers for libglib2.0-0:i386 (2.72.1-1) ...
Processing triggers for libglib2.0-0:amd64 (2.72.1-1) ...
Processing triggers for libc-bin (2.35-0ubuntu3.1) ...
Processing triggers for man-db (2.10.2-1) ...
Processing triggers for mailcap (3.70+nmu1ubuntu1) ...
Setting up gnome-software-plugin-snap (41.5-2) ...
$ sudo snap remove snap-store
snap-store removed
$ sudo snap install snap-store
error: cannot install "snap-store": Post
https://api.snapcraft.io/v2/snaps/refresh: parse 127.0.0.1:7890: first
path segment in URL cannot contain colon
After doing this I found that the 'software' (instead of Ubuntu software) I uninstalled earlier appears again. But it cannot act normally either.
Screenshot of my software centre
The index page looks fine, but when I clicked on any of items in catalogue then comes an error. After that if I click on any of the software, it simply crash.
$ gnome-software
04:13:02:0302 GLib-GIO g_dbus_proxy_new: assertion 'G_IS_DBUS_CONNECTION (connection)' failed
04:13:04:0191 Gs not handling error failed for action get-popular: status-code=500 kind=(null) message=Get https://api.snapcraft.io/v2/snaps/find?architecture=amd64&category=featured&confinement=strict%2Cclassic&fields=base%2Cconfinement%2Clinks%2Ccontact%2Cdescription%2Cdownload%2Clicense%2Cprices%2Cprivate%2Cpublisher%2Crevision%2Csummary%2Ctitle%2Ctype%2Cversion%2Cwebsite%2Cstore-url%2Cmedia%2Ccommon-ids%2Cchannel: parse 127.0.0.1:7890: first path segment in URL cannot contain colon
04:13:04:0191 Gs adding wildcard app */*/*/org.gnome.Builder.desktop/* to plugin cache
04:13:04:0191 Gs adding wildcard app */*/*/org.gnome.Calculator.desktop/* to plugin cache
04:13:04:0191 Gs adding wildcard app */*/*/org.gnome.clocks.desktop/* to plugin cache
04:13:04:0191 Gs adding wildcard app */*/*/org.gnome.Dictionary.desktop/* to plugin cache
04:13:04:0191 Gs adding wildcard app */*/*/org.gnome.Documents.desktop/* to plugin cache
04:13:04:0191 Gs adding wildcard app */*/*/org.gnome.Evince/* to plugin cache
04:13:04:0191 Gs adding wildcard app */*/*/org.gnome.gedit.desktop/* to plugin cache
04:13:04:0191 Gs adding wildcard app */*/*/org.gnome.Maps.desktop/* to plugin cache
04:13:04:0191 Gs adding wildcard app */*/*/org.gnome.Weather/* to plugin cache
04:13:04:0192 Gs Only 0 apps for recent list, hiding
04:13:04:0980 Gs Only 7 apps for popular list, hiding
04:13:05:0148 GsPluginSnap Failed to find refreshable snaps: status-code=500 kind=(null) message=cannot list updates: Post https://api.snapcraft.io/v2/snaps/refresh: parse 127.0.0.1:7890: first path segment in URL cannot contain colon
04:13:05:0193 Gtk Could not load a pixbuf from icon theme.
This may indicate that pixbuf loaders or the mime database could not be found.
I also try other method included in these two posts: https://www.maketecheasier.com/ubuntu-software-center-not-working-fixes/
https://itslinuxfoss.com/ubuntu-software-center-not-loading/
and I'm sure none of them work for me. It should be the problem with my proxy or network settings. Actually when I first installed ubuntu I cannot access to the 'software' the ubuntu borned with, after I finished intallation it told me I can access to many useful software in the software center and I cannot open it at that time.
Please help me out, this is very important to me! Thank you very much. Please let me know if any other information should be provided.
