yum安裝bind經常使用工具

安裝bind工具，如dig，nslookup等。

# rpm -qa | grep bind  
bind-libs-9.8.2-0.17.rc1.el6_4.6.x86_64    
bind-utils-9.8.2-0.17.rc1.el6_4.6.x86_64    
# rpm -ql bind-utils    
/usr/bin/dig    
/usr/bin/host    
/usr/bin/nslookup    
/usr/bin/nsupdate    
/usr/share/man/man1/dig.1.gz    
/usr/share/man/man1/host.1.gz    
/usr/share/man/man1/nslookup.1.gz    
/usr/share/man/man1/nsupdate.1.gz    
# rpm -ql bind-libs    
/usr/lib64/libbind9.so.80    
/usr/lib64/libbind9.so.80.0.4    
/usr/lib64/libdns.so.81    
/usr/lib64/libdns.so.81.4.1    
/usr/lib64/libisc.so.83    
/usr/lib64/libisc.so.83.0.3    
/usr/lib64/libisccc.so.80    
/usr/lib64/libisccc.so.80.0.0    
/usr/lib64/libisccfg.so.82    
/usr/lib64/libisccfg.so.82.0.1    
/usr/lib64/liblwres.so.80    
/usr/lib64/liblwres.so.80.0.2