1.run (bash make) command .
2.execute the file created to open shell.
3.press ctrl C ,or type exit for exiting the shell.
4.for killing background process , use kill {pid}. (initiates kill -9)
5.have a whitespace before every semicolon.
6.'|' and '>' should be seprated from others by white spaces
tilda.c ---> convert relative to absolute paths and vice-versa.
system.c ---> system commands with or wihtout arguments
ls.c ---> ls implementation
history.c ---> history command
kjob.c---> implement kjob using kill()
overkill.c ----> kills all the background process
piping.c ----> implements piping
env.c ----> set environment variable
corn.c -----> cronjob implementation
fgbg.c ---> fg,bg implementation
jobs ---> print jobs
redirection.c ----> implement redirection
cmds.c ----> redirect to right command
cd.c ----> cd command
header.h ----> include all the libraries
func-header.h ----> every functions
make ---> make file (RUN :bash make on your terminal)