hongy19’s blog

Dovecot upgrade from 2.3 to 2.4


  • see linkfor detail guideline, Archlinux provide dovecot23 as alternative
  • add two new configuration, seelink
  • dovecot_config_version = 2.4.2
  • dovecot_storage_version = 2.4.2
  • delete empy dict

#dict {
#quota = mysql:/etc/dovecot/dovecot-dict-sql.conf.ext
#expire = sqlite:/etc/dovecot/dovecot-dict-sql.conf.ext
#}

  • change “disable_plaintext_auth = yes” to “auth_allow_cleartext = no”, see link
  • rename userdb and passdb.
  • passdb authenticated the user.
  • userdb lookup then retrieves post-login information specific to the authenticated user

userdb passwd {
          #driver = passwd
}
passdb pam {
          #driver = pam
          passdb_driver=pam
}

Read more ⟶

/var/permission


 

fromlink, /var/mail should have correct permissions 2775 root:mail

The first digit “2” represents the setgid (Set Group ID) special permission:

  • 2 = setgid bit enabled
  • When set on a directory, new files created within inherit the directory’s group ownership
  • This ensures all mail files created in /var/mail automatically belong to the mail group

The s represents the setgid bit. It appears in the group execute position:* Normal group permissions: rwx (read, write, execute)

Read more ⟶

pdflatex + ctex support Chinese font


  • Xelatex could support Chinese with ctex + Truetype/OpenType font. you could search web for detail.
  • latex could support Chinese with ctex + tfm/pk font.
  • pdflatex need type1 font, so tfm/pk and Truetype/OpenType font doesn’t work. But there are three ways to support Chinese for pdflatex
  • ctex + simsum.ttc
  • \documentclass[fontset=windows]{ctexart}
  • zhmetrics provide tfm file for simsun.
  • zhmetrics provide mapping file to map tfm back to simsun.ttf (Truetype), but not for other Chinese ttf font,  see /usr/share/texmf-dist/tex/generic/zhmetrics/zhwinfonts.tex
  • it embedded Trutype font into pdf.
  • ctex + CJKutf8 + gbsn.
  • it embedded type1 font into pdf, you could use “pdffonts” to check.

\documentclass[fontset=none]{ctexart}**\usepackage{CJKutf8}
\begin{document}
\begin{CJK*}{UTF8}{gbsn}
你好,世界!
\end{CJK*}
\end{document}

Read more ⟶