我最近升级到了 22.04 似乎我的文件系统无法再访问。当我尝试 chown -R 我的主目录时，我收到只读文件系统错误消息
more etc/fstab：
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
# / was on /dev/sda5 during installation
UUID=7ad80332-310a-49d0-8985-e7dfa83ee62d / ext4 errors=remount-ro 0 1
# /boot/efi was on /dev/sda1 during installation
UUID=21AF-3E9A /boot/efi vfat umask=0077 0 1
/swapfile none swap sw 0 0
/dev/disk/by-uuid/4E0EE4AF0EE490EF /home auto nosuid,nodev,nofail,x-gvfs-show 0 0
//192.168.168.82/PAL /media/NAS/PAL cifs x-systemd.automount,x-systemd.device-timeout=7,uid=pierreannelaure,dir_mode=0777,file_mode=0777,c
redentials=/root/.smbcredentials,iocharset=utf8,users 0 0
//192.168.168.82/PIERRE /media/NAS/Pierre cifs x-systemd.automount,x-systemd.device-timeout=7,uid=pierreannelaure,dir_mode=0777,file_mode=077
7,credentials=/root/.smbcredentials,iocharset=utf8,users 0 0
//192.168.168.82/video /media/NAS/Video cifs x-systemd.automount,x-systemd.device-timeout=7,uid=pierreannelaure,dir_mode=0777,file_mode=0777
,credentials=/root/.smbcredentials,iocharset=utf8,users 0 0
//192.168.168.82/Audio /media/NAS/Audio cifs x-systemd.automount,x-systemd.device-timeout=7,uid=pierreannelaure,dir_mode=0777,file_mode=0777
,credentials=/root/.smbcredentials,iocharset=utf8,users 0 0
//192.168.168.82/photo /media/NAS/Photo cifs x-systemd.automount,x-systemd.device-timeout=7,uid=pierreannelaure,dir_mode=0777,file_mode=0777
,credentials=/root/.smbcredentials,iocharset=utf8,users 0 0
//192.168.168.82/FRANCOIS /media/NAS/François cifs x-systemd.automount,x-systemd.device-timeout=7,uid=pierreannelaure,dir_mode=0777,file_mo
de=0777,credentials=/root/.smbcredentials,iocharset=utf8,users 0 0
//192.168.168.82/THOMAS /media/NAS/Thomas cifs x-systemd.automount,x-systemd.device-timeout=7,uid=pierreannelaure,dir_mode=0777,file_mode=077
7,credentials=/root/.smbcredentials,iocharset=utf8,users 0 0
//192.168.168.82/MATHILDE /media/NAS/Mathilde cifs x-systemd.automount,x-systemd.device-timeout=7,uid=pierreannelaure,dir_mode=0777,fil
e_mode=0777,credentials=/root/.smbcredentials,iocharset=utf8,users 0 0
sudo ls -l home：
total 20
-r-------- 1 root root 24 juil. 4 2020 bblocks.txt
dr-x------ 1 root root 4096 nov. 6 18:46 mathilde
dr-x------ 1 root root 8192 nov. 8 07:14 pierreannelaure
dr-x------ 1 root root 4096 mars 25 2019 'sauvegarde PC'
dr-x------ 1 root root 4096 oct. 9 21:56 thomas
sudo chmod u+rw home/pierreannelaure：
chmod: modification des droits de 'home/pierreannelaure': Système de fichiers accessible en lecture seulement
法语中“只读文件系统”的意思