Unix Interview Questions & Answers
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).How to find out CPU utiligation?
top
25).How to execute ascript using nohup(script name=startweblogic.sh)?
nohup ./startWeblogic.sh &
26).Which command is used to search and replace a string?
sed
27)which command is used to search astring in multiple files?
fgrep
28)How to search a string from top to bottom in vi Editor's(String =weblogic)?
/weblogic
29)how to save and quit from vi Editor's?
a)WQ!
30)what are the Advantages of nohup command?
nohup will execute the process if you layout system.
Syn:nohup &.
31)Differance b/w the ping and tracert?
ping
1)It is check the connectivity.
2)It is display all at a time.
tracert
1.It is packet information one place to another place destination.
2.It display only 30 hubs in tracert.
32)How to execute unix commands in vi?
:ls
33)tar dir1 dir2 dir3 and new_dir?
syn:tar -cvf new_dir.tar dir1 dir2 dir3.
34)How to display the ipaddress and portnumber?
netstat -anp
35)how to delete directory with recursion and force?
rm -rf filename.
36)How to Open a file with page to page ?
more filename
37)How to Hide a file (file name=tuxedo)?
mv tuxedo .tuxedo
38)How to do undo in vi Editor's?
u
39)How to goto 100 Line in Vi Editor's?
100L
40)How to display last 100 Line from a file?
tail -100 filename
41)How to Reterive the fields from a file?
cut
42)How to zip a directory?(/home/directory)?
gzip -r /home/directory
43)How to go to end of the line in Vi?
G
44)Display the directiory count in current dir?
ls -lrt !wc -l
45)How to appeand data to the existing file?
cat>>filename
46)How to find out the diskspace of the fileSystem?
df -sh
47)write A syntax for the scp Commands?
Scp filename root@ipaddress:filename.
48)How to display the updated lines in file ?
tail -f filename.
49)How to display the ipaddress and portnumber?
netstat -anp
50)which command is used to connect to the remote server?
telenet ipaddress.
51)How to repalce and String in vi Editor's?
sed %s/oldstring/newstring/g
52)How to repalce and String in unix?
sed s/oldstring/newstring/g filename
53)How to display top 10 lines from a file?
head -10 filename.
54)syntax for tar and untar a file?
tar -cvf filename.tar file1 file2 file3.
tar -Xvf filename.tar
55)How to display hiddean a file?
ls -a.
56)How to Delete a blank line from a filename?
grep "^v" sample >temp
mv temp filename
57)How to display all cuurent running process?
ps -ef
58)syntax for zip and unzip file?
gzip filename.
gunzip filename.gz
No comments:
Post a Comment