In this above command, you will get all bad pattern present inside the file.

Q) How many only bad pattern present inside the above file FileSample.txt ?

Ans - $ grep –ow bad FileSample.txt | wc –l<Enter – Key>

Q) How to get 2 lines present after the pattern line ?

Ans - $ grep –A <Number of Lines present after the pattern line> <Pattern> <File Name><Enter – Key>

Q) How to get 2 lines present before the pattern line ?

Ans - $ grep –B <Number of Lines present before the pattern line> <Pattern> <File Name><Enter – Key>

Q) How to get 3 lines present before or after the pattern line ?

Ans - $ grep –C <Number of Lines present before or after the pattern line> <Pattern> <File Name><Enter – Key>

Q) How you search multiple patterns in a file ?

Ans – For Multiple Pattern Search, we go for egrep or extended grep.

Example –

$ grep –e bad –e good FileSample.txt<Enter – Key>

Here you will get bad and good pattern along with only bad and good pattern.

$ egrep ‘bad | good’ FileSample.txt<Enter – Key>

Here you will get only bad and good pattern.

$ grep –E ‘bad | good’ FileSample.txt<Enter – Key>

Here you will get only bad and good pattern.

Q) How you get lines having more than five or seven patterns from a file ?

Ans – Here we will go for fgrep i.e. file grep.

Put all the patterns in one file line by line.

Then run the below command.

$ fgrep <Multiple Pattern Containing File Name> <File Name><Enter – Key>

Stat Command: -

Q) Which command will show the creation, modification and access time, inode number and number of links of a file ?

Ans - $ stat <File Name><Enter – Key>

Man Command: -

Q) How you show a particular command details related to its working description, option deatils etc ?

Ans - $ man <Command Name><Enter – Key>

Tac Command: -

Q) Which command will show a file content in reverse order i.e. last line of the file will be first line, then 2^nd last line will be 2^nd line and so on ?

Ans - $ tac <File Name><Enter – Key>