title: Vertica backup error
body: <p>I try to do full backup on Vertica database. When I execute command:</p>
  
  <pre><code>/opt/vertica/bin/vbr.py --debug 3 --task backup --config-file vertica_backup.ini
  </code></pre>
  
  <p>I am getting following error:</p>
  
  <pre><code>/bin/sh: 1: ulimit: Illegal option -u
  Traceback (most recent call last):
  File "/opt/vertica/bin/vbr.py", line 2526, in backup
    prepareAll()
  File "/opt/vertica/bin/vbr.py", line 1888, in prepareAll
    configCheck()
  File "/opt/vertica/bin/vbr.py", line 506, in configCheck
    concurrency_upperboud = int(subprocess.Popen(['ulimit -u'], 
  shell=True, stdout= subprocess.PIPE).communicate()[0].strip())
  ValueError: invalid literal for int() with base 10: ''
  backup failed unexpectedly!
  </code></pre>
  
  <p>My vertica_backup.ini file:</p>
  
  <pre><code>[Misc]
  snapshotName = vertica_backup
  restorePointLimit = 1
  passwordFile = vertica
  
  [Database]
  dbName = dwh_vertica
  dbUser = dbadmin
  
  [Transmission]
  
  [Mapping]
  v_dwh_vertica_node0001 = vertica1:/home/dbadmin/backups
  </code></pre>
  
  <p>It's Debian Wheezy:</p>
  
  <pre><code>Linux vertica1 3.16.0-0.bpo.4-amd64 #1 SMP Debian 3.16.7-ckt11-1~bpo70+1 (2015-06-08) x86_64 GNU/Linux
  </code></pre>
  
  <p>/bin/sh points to /bin/sh -> dash</p>