当我在我的环境中设置了javau home之后，我在运行pig时得到了以下结果：

ubuntu@XXXXXX:~/pig/pig-0.11.1/bin$ export JAVA_HOME=/usr/lib/jvm/java-6-sun
ubuntu@ip-10-117-89-198:~/pig/pig-0.11.1/bin$ ./pig
Exception in thread "main" java.io.IOException: Permission denied
        at java.io.UnixFileSystem.createFileExclusively(Native Method)
        at java.io.File.checkAndCreate(File.java:1704)
        at java.io.File.createTempFile(File.java:1792)
        at org.apache.hadoop.util.RunJar.main(RunJar.java:115)

当我这么做的时候：

ubuntu@ip-10-117-89-198:~/pig/pig-0.11.1/bin$ sudo ./pig
Error: JAVA_HOME is not set.

但在我的环境中，java\u home设置为：

ubuntu@ip-10-117-89-198:~/pig/pig-0.11.1/bin$ env | grep java
OLDPWD=/usr/lib/jvm/java-6-sun
JAVA_HOME=/usr/lib/jvm/java-6-sun

运行于：ubuntu 10.04.4 lts java:java version“1.6.0\u 21”hadoop version:hadoop-0.20.203 pig version:pig-0.11.1 env:term=xterm shell=/bin/bash xdg\u session\u cookie=8ae630b8b99d1e6f701be8b54f4baedf-1372165040.445642-2054865008 ssh\u client=xx oldpwd=/home/ubuntu ssh\u tty=/dev/pts/0 user=ubuntu ls\u colors=0:di=01；34:ln=01；36:hl=44；37:pi=40；33:so=01；35:do=01；35:bd=40；33;01:cd=40；33;01:或=40；31;01:su=37；41:sg=30；43:ca=30；41:tw=30；42:ow=34；42:st=37；44:ex=01；32:.焦油=01；31:.tgz=01；31:.arj=01；31:.taz=01；31:.lzh=01；31:.lzma=01；31:.zip=01；31:z=01；31:z=01；31:.dz=01；31:.gz=01；31:.bz2=01；31:.bz=01；31:.tbz2=01；31:.tz=01；31:.deb=01；31:.rpm=01；31:.jar=01；31:.rar=01；31:.ace=01；31=01；31:.cpio=01；31:.7z=01；31:.rz=01；31:.jpg=01；35:.jpeg=01；35:.gif=01；35:.bmp=01；35:.pbm=01；35:.pgm=01；35:.ppm=01；35:.tga=01；35:.xbm=01；35:.xpm=01；35:.tif=01；35:.tiff=01；35:.png=01；35:.svg=01；35:.svgz=01；35:.mng=01；35:.pcx=01；35:.mov=01；35:.mpg=01；35:.mpeg=01；35:.m2v=01；35:.mkv=01；35:.ogm=01；35:.mp4=01；35:.m4v=01；35:.mp4v=01；35:.vob=01；35:.qt=01；35:.nuv=01；35:.wmv=01；35:.asf=01；35:.rm=01；35:.rmvb=01；35:.flc=01；35:.avi=01；35:.fli=01；35:.flv=01；35:.gl=01；35:.dl=01；35:.xcf=01；35:.xwd=01；35:.yuv=01；35:.axv=01；35:.anx=01；35:.ogv=01；35:.ogx=01；35:.aac=00；36:.au=00；36:.flac=00；36:.mid=00；36:.midi=00；36:.mka=00；36:.mp3=00；36:.mpc=00；36:.ogg=00；36:.ra=00；36:.wav=00；36:.axa=00；36:.oga=00；36:.spx=00；36:*.xspf=00；36:mail=/var/mail/ubuntu path=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/hadoop/bin pwd=/home/ubuntu/pig java\u home=/usr/lib/jvm/java-6-sun lang=en\u us.utf-8 shlvl=1 home=/home/ubuntu logname=ubuntu ssh\u connection=xx lessopen=/usr/bin/lessipe%s lessclose=/usr/bin/lessipe%s%s_=/usr/bin/环境