Corrected spacing for better read.
I used hduser to do the install. You need to add both the hduser user and hadoop group, use the following; $ sudo addgroup hadoop $ sudo adduser --ingroup hadoop hduser To check is hduser belongs to the hadoop group, use the following; hduser@Bigdata:~$ groups add existing hduser to hadoop group. hduser@Bigdata:~$ sudo usermod -g hadoop hduser hduser@Bigdata:~$ groups If you need to change the directory ownership, use; hduser@Bigdata:~$ sudo chown -R hduser:hadoop /usr/local/hadoop/ Clay McDonald -----Original Message----- From: Ying Huang [mailto:huangyi...@gmail.com] Sent: Tuesday, July 03, 2012 11:03 PM To: common-user@hadoop.apache.org Subject: Hadoop Installation on Ubuntu Hello, I have downloaded hadoop_1.0.3-1_x86_64.deb from hadoop official website, and installed using command under root privileged. dpkg -i hadoop_1.0.3-1_x86_64.deb But there is an error: chown: invalid group: `root:hadoop'. And later, when I running hadoop-setup-single-node.sh, I got lots of chown errors: Proceed with setup? (y/n) y chown: invalid user: `mapred:hadoop' chown: invalid user: `hdfs:hadoop' chown: invalid user: `mapred:hadoop' chown: invalid user: `hdfs:hadoop' chown: invalid group: `root:hadoop' chown: invalid user: `hdfs:hadoop' chown: invalid user: `mapred:hadoop' chown: invalid group: `root:hadoop' chown: invalid group: `root:hadoop' chown: invalid group: `root:hadoop' My java version is java version "1.6.0_24" OpenJDK Runtime Environment (IcedTea6 1.11.1) (6b24-1.11.1-4ubuntu3) OpenJDK 64-Bit Server VM (build 20.0-b12, mixed mode) Should I manually create the group "hadoop", if so, with what command or right mode, 444 or 777? And is there detail document about how to install and setup using deb file? -- Best Regards Ying Huang
