Index

U

UDP client-server model, 385–396

Unalias command (bash shell), 141

Union data structure, C++, 198

UNIX programming and Linux, 3–4

Unmask command (bash shell), 141

Unmounted file systems, 52, 55–57

Unset command (bash shell), 141

User functions

gawk scripting language, 112–114

desktops, 31–32

file managers and browsers, 32–37

shell prompt, 37–39

users and user groups, 39–42

Users

administration of, 39–42

login environment, 118, 122–128

useradd command, 39

/usr directory, 54

/usr/local directory, 54