Linux Advance Interview Question And Answer ( Linux Advance Command) Linux Series- 3

Linux Advance Interview Question And Answer ( Linux Advance Command) Linux Series- 3

100)How to search a word in command mode

->/word

101)If we want to search a word in command mode in forward direction then

which char we have to press?

->n

102)If we want to search a word in command mode in backward direction then

which char we have to press?

->N

103)List down all the insert modes commands

->i I a A o O s S

104)The command which is used to check whether there is any modification in

the file or not?

->$md5sum filename

105)Which command is used to split the file?

->$split filename

106)Write a command to split a file on the basic of no of lines.Split the file try.txt

and each file should contain 4 lines

->$split -no_of_line filename

$split -4 try.txt

107)Write a command to split a file on the basic of bytes.Split the file try.txt and

each file should contain 426723 byte

->split -b byte_value filename

split -b 426723 try.txt

108)Write a command to split a file on the basis of no of chunks.Split the file

try.txt into 3 files.

->$split -n no_of_files filename

$split -n 3 try.txt

109)Which command is used to set default permissions for files or directories

that are created by the user?

->$umask

110)Which command is used to translate the characters?

->$ tr

111) Write a command to convert all the vowels which are in small letters to

capital letters in the given sentence and print that newly translated sentence.

"Man is Mortal"

->$echo "Man is Mortal" |tr 'aeiou' 'AEIOU'

112)Write a command to convert 'abcd' '!@*%' in the given sentence.

"I love apples,dogs,cat and banana".

->$echo "I love apples,dog,cat and banana" |tr 'abcd' '!@*%'

113)Write a command if we want to delete a specific character from the string

using tr command.

"Man is Mortal"

Delete all the vowels .

->$echo "Man is Mortal" |tr -d 'aeiou'

114)Write a command to delete all the vowels from fruits.txt file using .

->$cat fruits.txt | tr -d 'aeiou'

115)Write a command to squeeze all 'o'to single o

"Helloooo Brooooo"

->$echo "Helloooo Brooooo" |tr -s 'o' 'o'

116)Write a command to squeeze 'lo' 'lo'

"Hellllloooooooooo Brrroooooo"

->$echo "Hellllloooooooooo Brrroooooo" |tr -s 'lo' 'lo'

117)Write a command to change space -> tab

"Hello my name is sakshi"

->$echo "Hello my name is sakshi" | tr ' ' '\t'

118)Write a command to print each word in new line

"Hello my name is sakshi sawalikar"

->$echo "Hello my name is sakshi" | tr ' ' '\n'

119)How to find files in a directory using the whole path. Path=

/home/ec2-user/folder1 and filename that you have to search is f1.txt

->$find full_path -name 'filename'

$find /home/ec2-user/folder1 -name 'filename'

120)How to get the last 10 lines of a file.Display last 10 lines of file try.txt

->tail try.txt

121)How to get the last 3 lines of a file.Display last 3 lines of file try.txt

->tail -n 3 try.txt

122)How to get first 10 lines of a file.Display the first 10 lines of file try.txt

->head try.txt

123)How to get the first 5 lines of file.Display the first 5 lines of file try.txt

->head -n 5 try.txt

1000 lines

Print 501-510

-> head -n 510 | tail -n 10 f1.txt

124)Sort the each word of a file try.txt

->cat try.txt | tr -s ' ' '/n' | sort

125)Sort the file try.txt according to the occurrence (count) of each word in the

file and then display the word having the highest count and comes last after

sorting .

->cat try.txt | tr -s ' ' '/n' | sort |uniq -c |sort -n |tail -n 1

126)Sort the file try.txt according to the occurrence (count) of each word in the

file and then display the first word having the highest count and comes first after

sorting .

->cat try.txt | tr -s ' ' '/n' | sort |uniq -c |sort -n |head -n 1

127)Which command is used in linux to view the content of text file one page at a

time.Use that command to view the file f5.txt

->$more f5.txt

128)Write a command to search a word (pavbhaji)in a text file named try.txt using

less command.

->$less try.txt

/pavbhaji

129)Suppose we have a txt file named as f1 having data

A B C D ------------M N O

And we want to print the data in the middle(E F G H) then write a command for

this task.

->$head -n 8 f1.txt|tail -n 4

130)Suppose we have f2.txt having 10000 records and we want from 500 to 510

then

->$head -n 510 f2.txt | tail -n 11

131)Write a command to copy 5000 lines from f2.txt into f3.txt

->$head -n 5000 f2.txt > f3.txt

132)Write a command to see no of lines ,word count and characters of file try.txt

->$wc try.txt

133)If we want to see numbers of lines only ,then write a command for it.

->$wc -l try.txt

134)If we want to see numbers of word count only ,then write a command for it.

->$wc -w try.txt

135)If we want to see numbers of no of characters only ,then write a command for

it.

->$wc -c try.txt

136)Write a command to extract specific fields from emp.txt having data

FPT1,ADHI, SCIENCE

MPT2,SAKSHI,MATHS

HPT3,SHRUTI,BCOM

Write a command to get the output as

FPT1,

MPT2,

HPT3,

->$cut -c 1-5 emp.txt

137)Write a command to get the output as

FPT1

MPT2

HPT3

->$cut -c 1-4 emp.txt

138)Write a command to extract specific fields from emp.txt having data and

write that extracted data into another txt file.

Write a command to get the output as

FPT1,

MPT2,

HPT3,

and save it into another file named as f1.txt

->$cat emp.txt | cut -c 1-5 > f1.txt

139)Write a command to extract 2-5 fields from emp.txt having data and write

that extracted data into another txt file named as f1.txt

->$cat emp.txt |cut -c 2-5 >f1.txt

140)Write a command to extract 3-10 fields from emp.txt having data and write

that extracted data into another txt file named as f1.txt

->$cat emp.txt |cut -c 3-10 >f1.txt

141)Write a command to display the content of files f1.txt f2.txt f3.txt vertically

using paste command

->$paste f1.txt f2.txt f3.txt

142)Write a command to display following output using cut command for emp.txt

file

Output:-FPT1

MPT2

HPT3

->cut -d "," -f2 emp.txt

143)Write a command to display the following output using cut command for

emp.txt file to display third column.

->$cut -d "," -f3 emp.txt

144)Write a command to redirect the output of date command save the output in

m2.txt

->$date > m2.txt or date 1>m.txt

145)Write a command to redirect the output of a command save the error in

m2.txt

->$dates 2>m2.txt

146)Write a command to see the processes that are currently active.

->$ps

147)Print the shell name where processes are currently running.

->$echo $0

148)Write a command to print process id

->$echo $$

149)How to check in which terminal we are?

->$tty -> /dev/pts/

150)Which command is used in Linux to display a detailed list of currently

running processes in a full format.

->$ps -f

$ ps -e … who the demon process / all process