我尝试使用命令行安装新的 LaTeX 包sudo tlmgr install comment
它告诉我：
tlmgr: Local TeX Live (2020) is older than remote repository (2021). Cross release updates are only supported with update-tlmgr-latest(.sh/.exe) --update See https://tug.org/texlive/upgrade.html for details.
因此，我尝试下载最后一个update-tlmgr-latest脚本并通过以下方式启动它：sh update-tlmgr-latest.sh -- --upgrade
这个脚本回答了我：
Uncompressing TeX Live Manager Updater 100%
./runme.sh: updating in /usr/local/texlive/2020basic...
./runme.sh: tlmgr version says this is TeX Live 2020,
./runme.sh: and this updater script created: Thu Oct 14 02:42:21 CEST 2021.
./runme.sh: ok, doing full release upgrade from 2020 to 2021.
LICENSE.CTAN: Can't unlink already-existing object
LICENSE.TL: Can't unlink already-existing object
README: Can't create 'README'
README.usergroups: Can't create 'README.usergroups'
index.html: Can't create 'index.html'
readme-html.dir/: Can't create 'readme-html.dir'
readme-html.dir/readme.pt-br.html: Failed to create dir 'readme-html.dir'
readme-html.dir/readme.ja.html: Failed to create dir 'readme-html.dir'
readme-html.dir/readme.de.html: Failed to create dir 'readme-html.dir'
readme-html.dir/readme.ru.html: Failed to create dir 'readme-html.dir'
readme-html.dir/readme.pl.html: Failed to create dir 'readme-html.dir'
readme-html.dir/readme.sk.html: Failed to create dir 'readme-html.dir'
readme-html.dir/readme.en.html: Failed to create dir 'readme-html.dir'
readme-html.dir/readme.it.html: Failed to create dir 'readme-html.dir'
readme-html.dir/readme.sr.html: Failed to create dir 'readme-html.dir'
readme-html.dir/readme.fr.html: Failed to create dir 'readme-html.dir'
readme-html.dir/readme.vi.html: Failed to create dir 'readme-html.dir'
readme-html.dir/readme.cs.html: Failed to create dir 'readme-html.dir'
readme-html.dir/readme.es.html: Failed to create dir 'readme-html.dir'
readme-html.dir/readme.zh-cn.html: Failed to create dir 'readme-html.dir'
readme-txt.dir/: Can't create 'readme-txt.dir'
readme-txt.dir/README.PL: Failed to create dir 'readme-txt.dir'
readme-txt.dir/README.RU-koi8: Failed to create dir 'readme-txt.dir'
readme-txt.dir/README.VI: Failed to create dir 'readme-txt.dir'
readme-txt.dir/README.SK: Failed to create dir 'readme-txt.dir'
readme-txt.dir/README.RU: Failed to create dir 'readme-txt.dir'
readme-txt.dir/README.IT: Failed to create dir 'readme-txt.dir'
readme-txt.dir/README.RU-cp1251: Failed to create dir 'readme-txt.dir'
readme-txt.dir/README.CS: Failed to create dir 'readme-txt.dir'
readme-txt.dir/README.JA: Failed to create dir 'readme-txt.dir'
readme-txt.dir/README.PT-BR: Failed to create dir 'readme-txt.dir'
readme-txt.dir/README.DE: Failed to create dir 'readme-txt.dir'
readme-txt.dir/README.SR: Failed to create dir 'readme-txt.dir'
readme-txt.dir/README.ZH-CN: Failed to create dir 'readme-txt.dir'
readme-txt.dir/README.EN: Failed to create dir 'readme-txt.dir'
readme-txt.dir/README.FR: Failed to create dir 'readme-txt.dir'
readme-txt.dir/README.ES: Failed to create dir 'readme-txt.dir'
release-texlive.txt: Can't unlink already-existing object
texmf-dist/: Can't restore time
texmf-dist/web2c/: Can't restore time
texmf-dist/scripts/: Can't restore time
texmf-dist/doc/: Can't restore time
texmf-dist/doc/man/: Can't create 'texmf-dist/doc/man'
texmf-dist/doc/man/man1/: Failed to create dir 'texmf-dist/doc/man'
texmf-dist/doc/man/man1/mktexlsr.1: Failed to create dir 'texmf-dist/doc/man'
texmf-dist/doc/man/man1/tlmgr.man1.pdf: Failed to create dir 'texmf-dist/doc/man'
texmf-dist/doc/man/man1/mktexlsr.man1.pdf: Failed to create dir 'texmf-dist/doc/man'
texmf-dist/doc/man/man1/tlmgr.1: Failed to create dir 'texmf-dist/doc/man'
texmf-dist/scripts/texlive/: Can't restore time
texmf-dist/scripts/texlive/mktexlsr: Can't unlink already-existing object
texmf-dist/scripts/texlive/tlmgrgui.pl: Can't unlink already-existing object
texmf-dist/scripts/texlive/tlmgr.pl: Can't unlink already-existing object
texmf-dist/scripts/texlive/uninstall-win32.pl: Can't unlink already-existing object
texmf-dist/scripts/texlive/tl-errmess.vbs: Can't unlink already-existing object
texmf-dist/scripts/texlive/uninstq.vbs: Can't unlink already-existing object
texmf-dist/scripts/texlive/NEWS: Can't create 'texmf-dist/scripts/texlive/NEWS'
texmf-dist/web2c/updmap-hdr.cfg: Can't unlink already-existing object
texmf-dist/web2c/fmtutil-hdr.cnf: Can't unlink already-existing object
tlpkg/: Can't restore time
tlpkg/tlpobj/: Can't restore time
tlpkg/gpg/: Can't restore time
tlpkg/README: Can't create 'tlpkg/README'
tlpkg/installer/: Can't restore time
tlpkg/TeXLive/: Can't restore time
tlpkg/TeXLive/TLDownload.pm: Can't unlink already-existing object
tlpkg/TeXLive/TLUtils.pm: Can't unlink already-existing object
tlpkg/TeXLive/TLPDB.pm: Can't unlink already-existing object
tlpkg/TeXLive/TLConfig.pm: Can't unlink already-existing object
tlpkg/TeXLive/TLPOBJ.pm: Can't unlink already-existing object
tlpkg/TeXLive/TLPSRC.pm: Can't unlink already-existing object
tlpkg/TeXLive/TLCrypto.pm: Can't unlink already-existing object
tlpkg/TeXLive/TeXCatalogue.pm: Can't unlink already-existing object
tlpkg/TeXLive/TLTREE.pm: Can't unlink already-existing object
tlpkg/TeXLive/TLConfFile.pm: Can't unlink already-existing object
tlpkg/TeXLive/trans.pl: Can't unlink already-existing object
tlpkg/TeXLive/TLWinGoo.pm: Can't unlink already-existing object
tlpkg/TeXLive/TLPaper.pm: Can't unlink already-existing object
tlpkg/installer/config.guess: Can't unlink already-existing object
tlpkg/installer/curl/: Can't create 'tlpkg/installer/curl'
tlpkg/installer/COPYING.MinGW-runtime.txt: Can't create 'tlpkg/installer/COPYING.MinGW-runtime.txt'
tlpkg/installer/curl/curl-ca-bundle.crt: Failed to create dir 'tlpkg/installer/curl'
tlpkg/installer/curl/curl.exe: Failed to create dir 'tlpkg/installer/curl'
tlpkg/gpg/tl-key-extension.txt: Can't unlink already-existing object
tlpkg/gpg/secring.gpg: Can't unlink already-existing object
tlpkg/gpg/pubring.gpg: Can't unlink already-existing object
tlpkg/gpg/random_seed: Can't unlink already-existing object
tlpkg/gpg/trustdb.gpg: Can't unlink already-existing object
tlpkg/tlpobj/texlive.infra.armhf-linux.tlpobj: Can't create 'tlpkg/tlpobj/texlive.infra.armhf-linux.tlpobj'
tlpkg/tlpobj/texlive.infra.x86_64-solaris.tlpobj: Can't create 'tlpkg/tlpobj/texlive.infra.x86_64-solaris.tlpobj'
tlpkg/tlpobj/texlive.infra.amd64-netbsd.tlpobj: Can't create 'tlpkg/tlpobj/texlive.infra.amd64-netbsd.tlpobj'
tlpkg/tlpobj/texlive.infra.win32.tlpobj: Can't create 'tlpkg/tlpobj/texlive.infra.win32.tlpobj'
tlpkg/tlpobj/texlive.infra.i386-linux.tlpobj: Can't create 'tlpkg/tlpobj/texlive.infra.i386-linux.tlpobj'
tlpkg/tlpobj/texlive.infra.universal-darwin.tlpobj: Can't create 'tlpkg/tlpobj/texlive.infra.universal-darwin.tlpobj'
tlpkg/tlpobj/texlive.infra.doc.tlpobj: Can't create 'tlpkg/tlpobj/texlive.infra.doc.tlpobj'
tlpkg/tlpobj/texlive.infra.i386-cygwin.tlpobj: Can't create 'tlpkg/tlpobj/texlive.infra.i386-cygwin.tlpobj'
tlpkg/tlpobj/texlive.infra.x86_64-linux.tlpobj: Can't create 'tlpkg/tlpobj/texlive.infra.x86_64-linux.tlpobj'
tlpkg/tlpobj/texlive.infra.x86_64-darwinlegacy.tlpobj: Can't create 'tlpkg/tlpobj/texlive.infra.x86_64-darwinlegacy.tlpobj'
tlpkg/tlpobj/texlive.infra.i386-netbsd.tlpobj: Can't create 'tlpkg/tlpobj/texlive.infra.i386-netbsd.tlpobj'
tlpkg/tlpobj/texlive.infra.aarch64-linux.tlpobj: Can't create 'tlpkg/tlpobj/texlive.infra.aarch64-linux.tlpobj'
tlpkg/tlpobj/texlive.infra.i386-freebsd.tlpobj: Can't create 'tlpkg/tlpobj/texlive.infra.i386-freebsd.tlpobj'
tlpkg/tlpobj/texlive.infra.amd64-freebsd.tlpobj: Can't create 'tlpkg/tlpobj/texlive.infra.amd64-freebsd.tlpobj'
tlpkg/tlpobj/texlive.infra.i386-solaris.tlpobj: Can't create 'tlpkg/tlpobj/texlive.infra.i386-solaris.tlpobj'
tlpkg/tlpobj/texlive.infra.x86_64-linuxmusl.tlpobj: Can't create 'tlpkg/tlpobj/texlive.infra.x86_64-linuxmusl.tlpobj'
tlpkg/tlpobj/texlive.infra.tlpobj: Can't unlink already-existing object
tlpkg/tlpobj/texlive.infra.x86_64-cygwin.tlpobj: Can't create 'tlpkg/tlpobj/texlive.infra.x86_64-cygwin.tlpobj'
tar: Error exit delayed from previous errors.
我不知道该怎么办...如果有人有想法，我会很高兴！