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GCC compilers -fomit-frame-pointer flag, LibSafe and Stackguard and ProPolice versions GMP (GNU multiple precision math library) GnuPG querying key servers for key ID and downloading result verifying signature of software with restricting specific applications graphical analysis console [See Sguil] graphing PHPlot or JPGraph, using with ACID group-writable permissions for directories groups specifying for scripts executed within virtual host |