Unix commands Interview questions
unix commands :-
1.Search a file from root directory.(filename = sample.txt)
find / -name sample.txt
2.Display the numbers in sorted order
sort -nu
3.Display the updated lines in file
tail -f filename
4.How to zip a Directory
gzip -r /hom/bea/app
5.How to kill a prosess.
kill -9 pid
6.Display all java process in unix.
ps -ef |grep java
7.How to delete 10 lines in vi editor.
10dd
8.How to search a string and replace tin vi editor.
:"%s/old string /new string/ gi"
9.How to search a string in vi editor from bottom to top.
?string name
10.How to insert a line above the current line in vi editor .
esc+o
11.How to rename a file .
mv file1 file2
12. copy the content one directory to another directory.
cp -r dir1/file1 dir2/file2
13. How can delete blank lines in directory.
grep -v "^$" sample > temp
mv temp sample
14.How can replace astring in unix.
sed "s/oldstring/newstring/g" filename
15.Syntax for zip and unzip afile.
gzip filename
guzip filename.gz
16.How can display top 10 disk usage files.
du -sh *|sort -nr|head -10
17.How to retrive a field in a file.
cut -f 1,2 stud.
18.what is command search a string in a file.
grep
19).How to goto the end of the line in Vieditor?
G
20).Copy 10 line in vi editor?
10yy
21).How to go to insert mode in vi editor?
Esc+i
22).How to search a string in a file(filename=sample,string=weblogic)?
grep weblogic sample
23).How to copyfile from one unix to other unix system and syntax (file=sample.txt,target host=192.168.11.128,target file path=/home/bea)?
scp -rp sample.txt username@192.168.11.128:/home/bea
24).Copy file from path to other tree structure is given below?
25).How to find out CPU utiligation?
top
26).How to execute ascript using nohup(script name=startweblogic.sh)?
nohup ./startWeblogic.sh &
27).Which command is used to search and replace a string?
sed
28).wich command is used to search astring in multiple files?
fgrep