All Questions(ubuntu)

The Ubuntu 24 installer told me that postgres 16 would replace 14. After the upgrade they both seemed to be available

$ dpkg -l | grep postgresql
ii  postgresql                                    16+257build1.1                           all          object-relational SQL database (supported version)
rc  postgresql-14                                 14.13-0ubuntu0.22.04.1                   amd64        The World's Most Advanced Open Source Relational Database
ii  postgresql-16                                 16.4-0ubuntu0.24.04.2                    amd64        The World's Most Advanced Open Sourc

I tried to run a cluster upgrade with pg_upgradecluster first of all dropping the newly installed 16 (it seemed safe to drop it because it was new) but could not complete the upgrade because of missing binaries.

$ sudo pg_lsclusters
Ver Cluster Port Status                Owner    Data directory              Log file
14  main    5432 down,binaries_missing postgres /var/lib/postgresql/14/main /var/log/postgresql/postgresql-14-main.log

And apt is not giving me an install option for postgres-14. Starting to panic slightly I checked my backups and found the latest is six months old. Should I just purge v14 and accept data loss, or try to find a way back?

UPDATE Following guidance from RobM below, postgres-14 was re-installed and the data was successfully recovered. Happy ending!

I'm using Ubuntu 24.04.1. When I press Fn + Shift simultaneously, a pop-up to shut down my computer appears. I tried to disable the shortcut from setting, but the key combination itself is recognized as 'PowerOff' instead of 'Fn + Shift'. Are there any ways to disable this, or bind this key combination for nothing?

The pop-up still shows up when I bind this shortcut for the command ':', however it didn't show up when I bound it to 'Show Activity Screen'. What is the difference?

I just upgraded to KDE 5.27.11 and it appears one my most used custom shortcuts cannot be done anymore.

I used to have Ctrl+Alt+Left and Ctrl+Alt+Right toggle between virtual desktops vertically (so I don't have to remember whether I want to go up or down), but now it seems that I need to set one to up and one to down, and going up/down when I'm already on the top/bottom does nothing.

Is there a way to have this work like it used to? IE: if I hit go up when on the top desktop, it advances to the bottom one.

I am trying to compile some code with clang++, but I receive an error that for examle iostream could not be found. I know that clang uses the gcc headers by default, so when I compile with g++ everything is fine. Any idea? I have already reinstalled it everything, but the problem persists.

Update: It now works only with clang++ -lc++ Hello-world.cpp -o Hello-world

Update:

❯ clang++ -v -Wall -std=c++23 main.cpp -o main
Ubuntu clang version 18.1.8 (9ubuntu1~24.04)
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/bin
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/10
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/11
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/12
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/13
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/14
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/5
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/5.5.0
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/7
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/7.5.0
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/9
Selected GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/14
Candidate multilib: .;@m64
Selected multilib: .;@m64
 "/usr/lib/llvm-18/bin/clang" -cc1 -triple x86_64-pc-linux-gnu -emit-obj -mrelax-all -dumpdir main- -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name main.cpp -mrelocation-model pic -pic-level 2 -pic-is-pie -mframe-pointer=all -fmath-errno -ffp-contract=on -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -fdebug-compilation-dir=/home/dejo -v -fcoverage-compilation-dir=/home/dejo -resource-dir /usr/lib/llvm-18/lib/clang/18 -internal-isystem /usr/bin/../lib/gcc/x86_64-linux-gnu/14/../../../../include/c++ -internal-isystem /usr/bin/../lib/gcc/x86_64-linux-gnu/14/../../../../include/c++/x86_64-linux-gnu -internal-isystem /usr/bin/../lib/gcc/x86_64-linux-gnu/14/../../../../include/c++/backward -internal-isystem /usr/lib/llvm-18/lib/clang/18/include -internal-isystem /usr/local/include -internal-isystem /usr/bin/../lib/gcc/x86_64-linux-gnu/14/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -Wall -std=c++23 -fdeprecated-macro -ferror-limit 19 -fgnuc-version=4.2.1 -fno-implicit-modules -fskip-odr-check-in-gmf -fcxx-exceptions -fexceptions -fcolor-diagnostics -dwarf-debug-flags "/usr/lib/llvm-18/bin/clang --driver-mode=g++ -v -Wall -std=c++23 main.cpp -o main -dumpdir main-" -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/main-6edf0e.o -x c++ main.cpp
clang -cc1 version 18.1.8 based upon LLVM 18.1.8 default target x86_64-pc-linux-gnu
ignoring nonexistent directory "/usr/bin/../lib/gcc/x86_64-linux-gnu/14/../../../../include/c++/x86_64-linux-gnu"
ignoring nonexistent directory "/usr/bin/../lib/gcc/x86_64-linux-gnu/14/../../../../include/c++/backward"
ignoring nonexistent directory "/usr/bin/../lib/gcc/x86_64-linux-gnu/14/../../../../x86_64-linux-gnu/include"
ignoring nonexistent directory "/include"
#include "..." search starts here:
#include <...> search starts here:
 /usr/bin/../lib/gcc/x86_64-linux-gnu/14/../../../../include/c++
 /usr/lib/llvm-18/lib/clang/18/include
 /usr/local/include
 /usr/include/x86_64-linux-gnu
 /usr/include
End of search list.
main.cpp:1:10: fatal error: 'iostream' file not found
    1 | #include <iostream>
      |          ^~~~~~~~~~
1 error generated.

I am not getting thumbnails for fujifilm RAF images.

I tried adding to /usr/share/thumbnailers/gdk-pixbuf-thumbnailer.thumbnailer the entries:

image/x-raf;image/x-fuji-raf;

I quit nautilus and deleted .cache/thumbnails/ but still I don't see thumbnail generation for RAF files.

The file utility recognizes the RAF files just fine:

$ file ~/Pictures/DSCF8520.RAF
/home/bram/Pictures/DSCF8520.RAF: Fujifilm RAF raw image data, format version 0201, camera GFX 50R

OS: Ubuntu 24.04.1 LTS