例如,如果我的Linux系统上的文件中有以下文本:given as file name) for lines containing a match to the given PATTERNis the same as grep -E. fgrep is the same as grep -FThe top program provides a dynamic real-timesummary information as well as a list
of processes or threads
Program received signal SIG34, Real-time event 34.#0 0x00007ffff6ea38cd in read () from /lib/x86_64-linux-gnu/libc.so.6
#1 0x00007ffff6e37ff8in _IO_file_underflow