衄褫夔岆path腔恀枙ㄛ珩衄褫夔岆羶衄假蚾ㄗ祥徹ㄛ楷俴唳珨啜衄man憩衄
commandㄘ

脤艘韜鍔腔繚噤ㄩ
# whereis 韜鍔 

麼氪蚚locateㄩ
# updatedb
# locate tcpdump

鍚俋ㄛinfo褫眕蛌遙man珩峈info腔源宒堐黍ㄛ硐猁斕抇洃emacs腔info堐黍炾嫦ㄛ
蚚info韜鍔測杸man韜鍔遜岆準都源晞腔﹝奧й衄竭嗣gnu腔�篲�赻湍info恅紫﹝扂
蠅蚚info脤艘憩夔艘獗準都砆牉腔妏蚚佽隴﹝褫洇荎恅腔ㄛ扂珩婓樓踡悝炾 :-)