Category Archives: operating system

commandline session $cat main.c #include<stdio.h> int main(void) { int i; printf(“n The Geek Stuff [%d]n”, i); return 0; } $gcc -C main.c $ls -l main main main.c main.i main.s $ls -l main. main.c main.i main.s $ls -l main. ls: cannot access main.: No such file or directory $rm main $rm a.out $gcc -C main.c $ls …

Continue reading “GCC COMMANDLINE OPTIONS PART 3”

ABOUT xargs xargs is a command on Unix and most Unix-like operating systems used to build and execute commands from standard input. It converts input from standard input into arguments to a command. Some commands such as grep and awk can take input either as command-line arguments or from the standard input. However, others such …

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$ 4.2.36 7 507—> grep ^S resume.txt Self Study and Consulting. Software Engineer. Sri Ramakrishna Engineering College, 1996-2000 $ 4.2.36 8 508—> grep ^A resume.txt August 2007 to present. Address: 12/214C Papali Road Vazhakkala. Kakkanad West. $ 4.2.36 9 509—> grep ^J resume.txt July 2005 – June 2007 $ 4.2.36 10 510—> grep ^N resume.txt …

Continue reading “grep prints the matching lines – First Character ^”

grep searches the named input FILEs (or standard input if no files are named, or if a single hyphen-minus (-) is given as file name) for lines containing a match to the given PATTERN. By default, grep prints the matching lines. commandline session $ cat first.txt name-jeffrin Age-35 Sex-Male $ grep 3. first.txt Age-35 $ …

Continue reading “REGULAR EXPRESSION WITH GREP – DOT”