... programminglanguage), 502stty, 221su, 391, 62 5substitution (tcl programminglanguage), 510swapoff, 3 46, 62 6swapon, 3 46, 62 6tail, 366 - 367 , 390, 62 6talk, 327, 62 6tar, 219, 62 6, 64 9backups, 377-378FTP, 144test, ... programminglanguage), 5 16 gprof, 473grep, 61 9, 64 2groff, 61 9guestgroup (FTP), 137guidelines, 61 2gzip (GNU), 62 0halt, 45, 62 0head (GNU), 366 - 367 hostname, 62 0id (GNU), 364 - 365 ifconfig, 254-255incr ... 147users (GNU), 363 - 364 vmstat (CPU performanceanalysis), 342-344wall, 3 26- 327, 62 7wc (GNU), 369 who, 363 - 364 , 392, 62 7write, 324-325xargs (GNU), 361 - 363 xhost +, 62 7xset, 62 8zip, 62 8see also...