我需要快速支持，如何为ubuntu10.10 php5 apache安装/启用xsl扩展。我尝试了这个命令“sudo apt-get install php5-xsl”得到了一些错误
1) 404 Not Found
2) Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?
3)Failed to fetch http://security.ubuntu.com/ubuntu/pool/main/p/php5/php5-xsl_5.3.3-1ubuntu9.10_i386.deb 404 Not Found [IP: 91.189.92.200 80]