Question

Find the output of following Linux commands: (a) cat f1 >> f2 (b) echo $SHELL (c) mkdir d1 d2 d3 (d) Is s*t (e) Is [a-f]* (f) Is -R (g) Is -xR (h) cp f1 f2 (i) Is | Sort (j) Is | tr -s " " | cut -d " " -f 5 | sort (k) Is -1 | grep -c "address.txt" (l) frep "Harshit Jain" address.txt (m) chmod u-w address.txt (n) wc -1 address.txt > totalstudents

Answer 1

UNIX File system commands are mv, rm, cat, pr, date, ls, cp, passwd, mail, write, wc, cmp, sort, tail, grep, help, man, ed and more.

Shell metacharacters uses the match files using filename shorthand that includes the I/O redirection, cat Editing, pipes, processes and more.

Making new commands are easier with the shell files or scripts.

Shell variables enabled in the process.