我很确定我对2018年的TeXLive版本进行了下调，但我为TeXLive配置自动更新时遇到了问题
$ ls -l /usr/local/texlive$ sudo tlmgr update --self --all
[sudo] Passwort :
(running on Debian, switching to user mode!)
tlmgr: Remote repository is newer than local (2017 < 2018)
Cross release updates are only supported with
update-tlmgr-latest(.sh/.exe) --update
Please see https://tug.org/texlive/upgrade.html for details.
寻找我的TexLive版本显示它是2018版本
$ ls -l /usr/local/texlive
insgesamt 8
drwxr-xr-x 9 root root 4096 Nov 20 17:50 2018
drwxr-xr-x 10 root root 4096 Nov 20 16:13 texmf-local
$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu …