Collecting MR1 task logs from TTs in a single command

$tar cvfzh /tmp/`hostname`-job_201407311402-tasklogs.tar.gz /var/log/hadoop-0.20-mapreduce/userlogs/job_201407311402_0001/*

Reason why we include the -h option in tar:

The following location typically includes symlinks to the actual location of the task logs, which typically resides in the working space of the TT:
/var/log/hadoop-0.20-mapreduce/userlogs/job_201407311402_0001/ 

$ls -l
lrwxrwxrwx 1 mapred mapred  81 Aug  8 07:54 attempt_201407311402_0001_m_000000_0 -> /mapred/local/userlogs/job_201407311402_0001/attempt_201407311402_0001_m_000000_0