-bash: sudo: command not found

в тех поддержке написали:
sockets в Debian вкомпилировано в бинарник
http://packages.debian.org/lenny/php5-cgi
The following extensions are built in: bcmath bz2 calendar ctype date dba dom exif filter ftp gettext hash iconv json libxml mbstring mime_magic openssl pcre posix Reflection session shmop SimpleXML soap sockets SPL standard sysvmsg sysvsem sysvshm tokenizer wddx xml xmlreader xmlwriter zip zlib.