Не могу открыть ни одного AppImage в Ubuntu 19.04

Кажется, я вообще не могу открыть AppImages. Я получаю ошибку "Нет такого файла или каталога" , которая кажется странной.

Права доступа также должны быть правильными, и скачанный AppImage тоже не запустится. Поняли, что это может вызвать?

ОБНОВЛЕНИЕ 1:
[1111 ] Я попробовал это снова с предложенным Appimage из комментариев, но увы, это не работает. Это по крайней мере объясняет, что проблема заключается в моей системе, а не в приложениях.

Вот код из последнего теста:

massigest@Laptop-Massi:~/Applications/Leafpad$ ls -l
total 768
-rwxrwxr-x 1 massigest massigest 786432 mei 22 15:28 Leafpad-0.8.17-x86_64.AppImage
massigest@Laptop-Massi:~/Applications/Leafpad$ ./Leafpad-0.8.17-x86_64.AppImage 
bash: ./Leafpad-0.8.17-x86_64.AppImage: No such file or directory

ОБНОВЛЕНИЕ 2:
ПРИМЕЧАНИЕ. AppImage не может работать ни в одном каталоге. А папка «Приложения» принадлежит мне.

Другие приложения, не относящиеся к AppImage, могут запускаться в моей папке приложений, я добавил пример этого ниже:

massigest@Laptop-Massi:~/Applications/ArduinoIDE$ ls -l arduino
-rwxrwxr-x 1 massigest massigest 882 dec  6 11:24 arduino
massigest@Laptop-Massi:~/Applications/ArduinoIDE$ ./arduino
Picked up JAVA_TOOL_OPTIONS: 

Кто-то также запросил, что должен отметить вывод mount, так что посмотрите, что ниже здесь:

massigest@Laptop-Massi:~/Applications$ mount
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime)
proc on /proc type proc (rw,nosuid,nodev,noexec,relatime)
udev on /dev type devtmpfs (rw,nosuid,relatime,size=8121196k,nr_inodes=2030299,mode=755)
devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000)
tmpfs on /run type tmpfs (rw,nosuid,noexec,relatime,size=1629296k,mode=755)
/dev/sda2 on / type ext4 (rw,relatime,errors=remount-ro)
securityfs on /sys/kernel/security type securityfs (rw,nosuid,nodev,noexec,relatime)
tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev)
tmpfs on /run/lock type tmpfs (rw,nosuid,nodev,noexec,relatime,size=5120k)
tmpfs on /sys/fs/cgroup type tmpfs (ro,nosuid,nodev,noexec,mode=755)
cgroup2 on /sys/fs/cgroup/unified type cgroup2 (rw,nosuid,nodev,noexec,relatime,nsdelegate)
cgroup on /sys/fs/cgroup/systemd type cgroup (rw,nosuid,nodev,noexec,relatime,xattr,name=systemd)
pstore on /sys/fs/pstore type pstore (rw,nosuid,nodev,noexec,relatime)
efivarfs on /sys/firmware/efi/efivars type efivarfs (rw,nosuid,nodev,noexec,relatime)
bpf on /sys/fs/bpf type bpf (rw,nosuid,nodev,noexec,relatime,mode=700)
cgroup on /sys/fs/cgroup/cpu,cpuacct type cgroup (rw,nosuid,nodev,noexec,relatime,cpu,cpuacct)
cgroup on /sys/fs/cgroup/net_cls,net_prio type cgroup (rw,nosuid,nodev,noexec,relatime,net_cls,net_prio)
cgroup on /sys/fs/cgroup/perf_event type cgroup (rw,nosuid,nodev,noexec,relatime,perf_event)
cgroup on /sys/fs/cgroup/devices type cgroup (rw,nosuid,nodev,noexec,relatime,devices)
cgroup on /sys/fs/cgroup/memory type cgroup (rw,nosuid,nodev,noexec,relatime,memory)
cgroup on /sys/fs/cgroup/cpuset type cgroup (rw,nosuid,nodev,noexec,relatime,cpuset)
cgroup on /sys/fs/cgroup/rdma type cgroup (rw,nosuid,nodev,noexec,relatime,rdma)
cgroup on /sys/fs/cgroup/pids type cgroup (rw,nosuid,nodev,noexec,relatime,pids)
cgroup on /sys/fs/cgroup/blkio type cgroup (rw,nosuid,nodev,noexec,relatime,blkio)
cgroup on /sys/fs/cgroup/freezer type cgroup (rw,nosuid,nodev,noexec,relatime,freezer)
cgroup on /sys/fs/cgroup/hugetlb type cgroup (rw,nosuid,nodev,noexec,relatime,hugetlb)
systemd-1 on /proc/sys/fs/binfmt_misc type autofs (rw,relatime,fd=30,pgrp=1,timeout=0,minproto=5,maxproto=5,direct,pipe_ino=1236)
mqueue on /dev/mqueue type mqueue (rw,relatime)
hugetlbfs on /dev/hugepages type hugetlbfs (rw,relatime,pagesize=2M)
debugfs on /sys/kernel/debug type debugfs (rw,relatime)
binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw,relatime)
configfs on /sys/kernel/config type configfs (rw,relatime)
fusectl on /sys/fs/fuse/connections type fusectl (rw,relatime)
/var/lib/snapd/snaps/gnome-characters_206.snap on /snap/gnome-characters/206 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/gtk-common-themes_1122.snap on /snap/gtk-common-themes/1122 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/discord_91.snap on /snap/discord/91 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/gnome-3-26-1604_82.snap on /snap/gnome-3-26-1604/82 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/gnome-logs_45.snap on /snap/gnome-logs/45 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/docker_384.snap on /snap/docker/384 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/spotify_32.snap on /snap/spotify/32 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/core_6964.snap on /snap/core/6964 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/spotify_34.snap on /snap/spotify/34 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/core18_941.snap on /snap/core18/941 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/mailspring_326.snap on /snap/mailspring/326 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/docker_381.snap on /snap/docker/381 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/gnome-3-26-1604_78.snap on /snap/gnome-3-26-1604/78 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/core_6673.snap on /snap/core/6673 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/core_6818.snap on /snap/core/6818 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/gnome-3-28-1804_40.snap on /snap/gnome-3-28-1804/40 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/chromium-ffmpeg_11.snap on /snap/chromium-ffmpeg/11 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/chromium-ffmpeg_13.snap on /snap/chromium-ffmpeg/13 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/discord_92.snap on /snap/discord/92 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/gnome-characters_254.snap on /snap/gnome-characters/254 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/mailspring_346.snap on /snap/mailspring/346 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/core18_782.snap on /snap/core18/782 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/gnome-logs_57.snap on /snap/gnome-logs/57 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/gnome-characters_258.snap on /snap/gnome-characters/258 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/datagrip_48.snap on /snap/datagrip/48 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/spotify_35.snap on /snap/spotify/35 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/whatsdesk_15.snap on /snap/whatsdesk/15 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/gtk-common-themes_1198.snap on /snap/gtk-common-themes/1198 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/gnome-3-28-1804_31.snap on /snap/gnome-3-28-1804/31 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/code_7.snap on /snap/code/7 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/docker_372.snap on /snap/docker/372 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/gnome-3-26-1604_74.snap on /snap/gnome-3-26-1604/74 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/core18_970.snap on /snap/core18/970 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/gtk-common-themes_818.snap on /snap/gtk-common-themes/818 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/discord_93.snap on /snap/discord/93 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/gnome-3-28-1804_36.snap on /snap/gnome-3-28-1804/36 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/mailspring_338.snap on /snap/mailspring/338 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/gnome-logs_61.snap on /snap/gnome-logs/61 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/whatsdesk_17.snap on /snap/whatsdesk/17 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/vlc_770.snap on /snap/vlc/770 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/chromium-ffmpeg_9.snap on /snap/chromium-ffmpeg/9 type squashfs (ro,nodev,relatime,x-gdu.hide)
/dev/sda1 on /boot/efi type vfat (rw,relatime,fmask=0077,dmask=0077,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro)
/dev/sdb2 on /mnt/HardDisk type fuseblk (rw,nosuid,nodev,relatime,user_id=0,group_id=0,allow_other,blksize=4096,x-gvfs-show)
tmpfs on /run/snapd/ns type tmpfs (rw,nosuid,noexec,relatime,size=1629296k,mode=755)
nsfs on /run/snapd/ns/docker.mnt type nsfs (rw)
tmpfs on /run/user/1000 type tmpfs (rw,nosuid,nodev,relatime,size=1629296k,mode=700,uid=1000,gid=1000)
gvfsd-fuse on /run/user/1000/gvfs type fuse.gvfsd-fuse (rw,nosuid,nodev,relatime,user_id=1000,group_id=1000)
/dev/fuse on /run/user/1000/doc type fuse (rw,nosuid,nodev,relatime,user_id=1000,group_id=1000)
nsfs on /run/snapd/ns/mailspring.mnt type nsfs (rw)

ОБНОВЛЕНИЕ 3:

Я выполнил другую команду, чтобы проверить, принадлежала ли моя папка root. Я не могу опубликовать весь вывод из-за ограничения по количеству символов, но я покажу важные результаты ниже:

  3018208     48 -rwxrwxr-x   1 root     root        47231 feb 28 12:35 ./Applications/lpass/lastpass-cli/build/Makefile
   524793      8 -rwxrwxr-x   1 root     root         5694 apr  8 10:27 ./Applications/appeditor-master/build/po/fr.gmo

Вы также можете проверить pastebin для полного вывода.