Unix Command Practice Assignment – 1

Assignment – 1

1)create  the directory structure under your home directory
  /subject/cmsa
  /subject/phsa
  /subject/mtma
  /subject/cmsa/third
in a single command
Ans: [cmsa1@localhost ~]$ 
mkdir subject subject/cmsa subject/phsa subject/mtma subject/cmsa/third

2) create three blank files a1.txt,a2.txt,a3.txt under directory third in a single command
Ans: [cmsa1@localhost third]$ touch a1.txt a2.txt a3.txt

3) copy the file a1.txt into  directory cmsa and mtma
Ans:[cmsa1@localhost third]$ cp a1 ..
    [cmsa1@localhost third]$ cp a1 ../../mtma

4) Write content to the 3 files.compare the files a1.txt and a2.txt
Ans:[cmsa1@localhost third]$ cmp a1 a2

5) Show the common lines between a1.txt and a2.txt
Ans:[cmsa1@localhost third]$ sort a1>x1
    [cmsa1@localhost third]$ sort a2>x2
    [cmsa1@localhost third]$ comm -12 x1 x2

6) show only the files under your home directory
Ans:[cmsa1@localhost third]$ find . -maxdepth 1 -type f

7) Print the lines in files under directory third that doesn’t contain the word UNIX or unix.
Ans:[cmsa1@localhost third]$ grep -v -e "UNIX" -e "unix" *

8) Rename all .txt files to .bak files under directory third.
Ans:[cmsa1@localhost third]$ rename .txt .bak *.txt