Required Linux utilities

The BDD installer requires several Linux utilities.

The following must be present in the /bin directory:

basename
cat
chgrp
chown
date
dd
df
mkdir
more
rm
sed
tar
true

The following must be present in the /usr/bin directory:

awk
cksum
cut
dirname
expr
gzip
head
id
netcat
perl (see below)
printf
sudo (Note: This is the default version on OEL 6.x.)
tail
tr
unzip
wc
which

In addition to these, BDD requires the following:

Perl 5.10+ with multithreading. This must be set as the default version on all BDD nodes. Additionally, the install machine requires some specific Perl modules; see Installing the required Perl modules for instructions on installing them.
The default umask set to 022 on all BDD nodes, including Hadoop nodes.
curl 7.19.7+ with support for the --tlsv1.2 and --negotiate options. This must be installed on all nodes that will host Studio.
Network Security Services (NSS) 3.16.1+ on all nodes that will host Studio.
nss-devel on all nodes that will host Studio. This contains the nss-config command, which must be installed in /usr/bin.
nss-devel is included in Linux 6.7 and higher, but needs to be installed manually on older versions. To see if it's installed, run:
```
sudo rpm -q nss-devel
```
If nss-devel is installed, the above command should return its version number. You should also verify that nss-config is available in /usr/bin.
If you don't have nss-devel, install it by running:
```
sudo yum install nss-devel
```
nss-config will be installed in /usr/bin by default.
tty disabled for sudo. If it's currently enabled, comment out the line Defaults requiretty in /etc/sudoers on all nodes:
```
#Defaults requiretty
```
Apache Ant 1.7.1+ installed and added to the PATH on all nodes, including Hadoop nodes.