man pages section 1: User Commands
Y
- 
yacc(1)– yet another compiler-compiler
 
- 
yes(1)– generate repetitive
affirmative output
 
- 
ypcat(1)– print values in a NIS database
 
- 
ypmatch(1)– print the value of one or more keys from a NIS map
 
- 
yppasswd(1)– change your network password in the NIS database
 
- 
ypwhich(1)– return name of NIS server or map master
 
 
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