ThisbookisaboutsystemprogrammingonLinux.Systemprogrammingisthepracticeofwritingsystemsoftware,whichiscodethatlivesatalowlevel,talkingdirectlytothekernelandcoresystemlibraries.Putanotherway,thetopicofthebookisLinuxsystemcallsandlow-levelfunctionssuchasthosedefinedbytheClibrary.