问运行apt更新E时出错:无法确定fd7-fstat的文件大小

EN

root@localhost:~# apt update
Get:1 http://ports.ubuntu.com/ubuntu-ports hirsute InRelease [269 kB]
Get:2 http://ports.ubuntu.com/ubuntu-ports hirsute-updates InRelease [109 kB]
Get:3 http://ports.ubuntu.com/ubuntu-ports hirsute-backports InRelease [90.7 kB]
Get:4 http://ports.ubuntu.com/ubuntu-ports hirsute-security InRelease [101 kB]
Reading package lists... Done
E: Unable to determine file size for fd 7 - fstat (1: Operation not permitted)
E: The repository 'http://ports.ubuntu.com/ubuntu-ports hirsute InRelease' provides only weak security information.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: Unable to determine file size for fd 7 - fstat (1: Operation not permitted)
E: The repository 'http://ports.ubuntu.com/ubuntu-ports hirsute-updates InRelease' provides only weak security information.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: Unable to determine file size for fd 7 - fstat (1: Operation not permitted)
E: The repository 'http://ports.ubuntu.com/ubuntu-ports hirsute-backports InRelease' provides only weak security information.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: Unable to determine file size for fd 7 - fstat (1: Operation not permitted)
E: The repository 'http://ports.ubuntu.com/ubuntu-ports hirsute-security InRelease' provides only weak security information.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.

root@localhost:~# ls -ld /tmp
drwx------ 2 root root 3488 Jul  1 10:54 /tmp

root@localhost:~# cat /etc/apt/sources.list
# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://ports.ubuntu.com/ubuntu-ports/ hirsute main restricted
# deb-src http://ports.ubuntu.com/ubuntu-ports/ hirsute main restricted

## Major bug fix updates produced after the final release of the
## distribution.
deb http://ports.ubuntu.com/ubuntu-ports/ hirsute-updates main restricted
# deb-src http://ports.ubuntu.com/ubuntu-ports/ hirsute-updates main restricted

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also, please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.
deb http://ports.ubuntu.com/ubuntu-ports/ hirsute universe
# deb-src http://ports.ubuntu.com/ubuntu-ports/ hirsute universe
deb http://ports.ubuntu.com/ubuntu-ports/ hirsute-updates universe
# deb-src http://ports.ubuntu.com/ubuntu-ports/ hirsute-updates universe

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team, and may not be under a free licence. Please satisfy yourself as to
## your rights to use the software. Also, please note that software in
## multiverse WILL NOT receive any review or updates from the Ubuntu
## security team.
deb http://ports.ubuntu.com/ubuntu-ports/ hirsute multiverse
# deb-src http://ports.ubuntu.com/ubuntu-ports/ hirsute multiverse
deb http://ports.ubuntu.com/ubuntu-ports/ hirsute-updates multiverse
# deb-src http://ports.ubuntu.com/ubuntu-ports/ hirsute-updates multiverse

## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
deb http://ports.ubuntu.com/ubuntu-ports/ hirsute-backports main restricted universe multiverse
# deb-src http://ports.ubuntu.com/ubuntu-ports/ hirsute-backports main restricted universe multiverse

## Uncomment the following two lines to add software from Canonical's
## 'partner' repository.
## This software is not part of Ubuntu, but is offered by Canonical and the
## respective vendors as a service to Ubuntu users.
# deb http://archive.canonical.com/ubuntu hirsute partner
# deb-src http://archive.canonical.com/ubuntu hirsute partner

deb http://ports.ubuntu.com/ubuntu-ports/ hirsute-security main restricted
# deb-src http://ports.ubuntu.com/ubuntu-ports/ hirsute-security main restricted
deb http://ports.ubuntu.com/ubuntu-ports/ hirsute-security universe
# deb-src http://ports.ubuntu.com/ubuntu-ports/ hirsute-security universe
deb http://ports.ubuntu.com/ubuntu-ports/ hirsute-security multiverse
# deb-src http://ports.ubuntu.com/ubuntu-ports/ hirsute-security multiverse