Example: System Call Tracing

Which shared libraries is dot loading?

$ strace dot </dev/null 2>&1 | fgrep .so | fgrep -v ENOENT
open("/etc/ld.so.cache", O_RDONLY)      = 3
open("/usr/lib/libfreetype.so.6", O_RDONLY) = 3
open("/usr/lib/libpng.so.2", O_RDONLY)  = 3
open("/usr/lib/libjpeg.so.62", O_RDONLY) = 3
open("/usr/lib/libz.so.1", O_RDONLY)    = 3
open("/lib/libm.so.6", O_RDONLY)        = 3
open("/lib/libc.so.6", O_RDONLY)        = 3

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