當Ubuntu 7.10的軟件m沒有更新完全，以后再次安裝新軟件就會出現failed to write cache的錯誤。
這里給出2種解決方法，都是將代碼復制到終端中運行：
1、這段腳本代碼測試可行。
sudo fc-cache -fv 2>&1 | grep failed | cut -f1 -d":" | xargs -i sudo touch {} && sudo fc-cache -fv
2、這段腳本代碼未親自測試，不過 Ubuntu中文論壇有人用過有效。
#!/bin/bash
#
# 修正 Ubuntu  fc-cache failed to write cache 錯誤
#
sudo touch /usr/share/fonts
sudo touch /usr/share/fonts/X11
sudo touch /usr/share/fonts/X11/100dpi
sudo touch /usr/share/fonts/X11/75dpi
sudo touch /usr/share/fonts/X11/Type1
sudo touch /usr/share/fonts/X11/encodings
sudo touch /usr/share/fonts/X11/encodings/large
sudo touch /usr/share/fonts/X11/misc
sudo touch /usr/share/fonts/X11/util
sudo touch /usr/share/fonts/truetype
sudo touch /usr/share/fonts/truetype/arphic
sudo touch /usr/share/fonts/truetype/baekmuk
sudo touch /usr/share/fonts/truetype/freefont
sudo touch /usr/share/fonts/truetype/kochi
sudo touch /usr/share/fonts/truetype/openoffice
sudo touch /usr/share/fonts/truetype/thai
sudo touch /usr/share/fonts/truetype/ttf-arabeyes
sudo touch /usr/share/fonts/truetype/ttf-bengali-fonts
sudo touch /usr/share/fonts/truetype/ttf-bitstream-vera
sudo touch /usr/share/fonts/truetype/ttf-dejavu
sudo touch /usr/share/fonts/truetype/ttf-devanagari-fonts
sudo touch /usr/share/fonts/truetype/ttf-gentium
sudo touch /usr/share/fonts/truetype/ttf-gujarati-fonts
sudo touch /usr/share/fonts/truetype/ttf-kannada-fonts
sudo touch /usr/share/fonts/truetype/ttf-lao
sudo touch /usr/share/fonts/truetype/ttf-malayalam-fonts
sudo touch /usr/share/fonts/truetype/ttf-mgopen
sudo touch /usr/share/fonts/truetype/ttf-oriya-fonts
sudo touch /usr/share/fonts/truetype/ttf-punjabi-fonts
sudo touch /usr/share/fonts/truetype/ttf-tamil-fonts
sudo touch /usr/share/fonts/truetype/ttf-telugu-fonts
sudo touch /usr/share/fonts/type1
sudo touch /usr/share/fonts/type1/gsfonts
sudo touch /usr/share/X11/fonts
sudo touch /usr/share/X11/fonts/100dpi
sudo touch /usr/share/X11/fonts/75dpi
sudo touch /usr/share/X11/fonts/Type1
sudo touch /usr/share/X11/fonts/encodings
sudo touch /usr/share/X11/fonts/encodings/large
sudo touch /usr/share/X11/fonts/misc
sudo touch /usr/share/X11/fonts/util
sudo touch /usr/local/share/fonts
sudo touch /var/lib/defoma/fontconfig.d
sudo touch /var/lib/defoma/fontconfig.d/A
sudo touch /var/lib/defoma/fontconfig.d/B
sudo touch /var/lib/defoma/fontconfig.d/C
sudo touch /var/lib/defoma/fontconfig.d/D
sudo touch /var/lib/defoma/fontconfig.d/E
sudo touch /var/lib/defoma/fontconfig.d/F
sudo touch /var/lib/defoma/fontconfig.d/G
sudo touch /var/lib/defoma/fontconfig.d/H
sudo touch /var/lib/defoma/fontconfig.d/J
sudo touch /var/lib/defoma/fontconfig.d/K
sudo touch /var/lib/defoma/fontconfig.d/L
sudo touch /var/lib/defoma/fontconfig.d/M