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What is the command to list files from directory in decreasing order of their file size.
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What does the following command do?cp $ABC/$SUP/xyz.tct .;?
Markerhell
- Aug 28th, 2009
This will copy the file xyz.tct from root directory ( / ) to present working directory.
Rashmi
- Jul 9th, 2006
This command will copy the file abc.txt (picked up from the location $ABC/$SUP/) to the current directory u are working on. The file created on the currect directory will also be of the same name abc.txt
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How will u list the contents of parent directory from the current directory? What are the default system wide permissions for a file and directory? What is the default umask value?A user is not able to change the permission , What can it happen? What's the difference between ls -F , ls -p? If a file permission are 000, can the superuser still read and write to that file.? What's the command to remove the files without write permission? How will u make sure that no one can see the files which u had created? How will u change the permissions of a directory recursively? Any response will be greatly appreciated?
Markerhell
- Aug 27th, 2009
1. ls ../2. for files: 644 for directory: 7553. default umask value: 0224. He must not be having permissions to access the file, so cant even change the permission of the file5. When...
rps1007
- May 12th, 2008
Ls .. gives the content of the parent directoryls ../.. gives the content of parent's parent's direcoty
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How to import and export the data from databse using shell script
Markerhell
- Aug 26th, 2009
To import the data:
mysqldump -u username -p databasename >> databasenamedump.sql
To Export the data:
mysql -u username -p newdatabasename < databasenamedump.sql
anuraggupta81
- Sep 18th, 2007
Following command will be used for import from shell scriptimp [DBA User/DBA Password] FILE= [File Name] FROMUSER=[User from which the dump is taken] TOUSER=i[user to which the dump will be imported]&...
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Write a shell script to list only the hidden files in the current directories? What is the o/p of following command $a =*, echo $a, echo "$a"? Which of the following is allowed in an arithmetic involving expr instruction. [],{},()? If values "hi", "Hello","Bye","Good Bye" are supplied to the following statement what will be the o/p read n1,n2 , echo $n1 $n2? How do you know that how many commands can be stored in the buffer in one session?
Markerhell
- Aug 26th, 2009
1. ls > a.txt | ls -a > b.txt | diff a.txt b.txt 2. echo $a will print the list of all the files in the directory in row manner. echo "$a" will print * on t...
raj
- May 17th, 2007
You can get them by just giving ls -ax | head -2
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Unix command to concatenate (attach) two strings?
Markerhell
- Aug 26th, 2009
There are two different ways to do the same.1. var1 = "first"var2 = "second"var3 = $var1$var2The only problem with the above solution is you can not attach the general text at hte ...
sharifhere
- Dec 7th, 2006
Variable1="Open"Variable2="Systems"Variable3=$Variable1$Variable2echo $Variable3-- Output OpenSystems
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How do you find OS block size in UNIX TRU64
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Extracting File Name
How can you extract just the Filename from the Fully Qualified Path and Filename.Basename?
jincee
- Aug 10th, 2009
file1=`basename $0`echo "$file1"(or)file1=`basename /home/user1/Jincy/base.ksh`echo $file1 The above commands will give the outpuy as base.ksh if you just need the base of the file...
arunkumj
- Jan 15th, 2009
Cat will give the full content of a file in one go.more will give the content of the file in page by page
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What is the command to view the active vg?
richa.saxena83
- Jul 28th, 2009
HPUX:# vgdisplay If the VG is ACTIVE, you will get the output else an error message "vg not active".-RK
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What is relative path and absolute path?
Absolute path : Exact path from root directory.Relative path : Relative to the current path.
mmakoko
- Jul 25th, 2009
Absolute path: Exact path from root directory to the target directory.Relative path: Path for current directory to target directory.
shyam82
- Apr 21st, 2009
Relative path name is relative to current directory. Following notations are very heplful.1* denotes current directory2** denotes parent directoryAbsolute path name is full path name. Each directory a...
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UNIX Password change issue
Hi,While trying to change the password of a normal user [ I logged in as root], I am getting the following message :-[root@localhost root]# passwd someuserChanging password for user someuser.passwd: Authentication information cannot be recovered[root@localhost root]#-------------------Think there's some issue in PAM configuration for password policy, please guide me for the same. Its urgent. Thanks...
dgangadharn09
- Jul 11th, 2009
You can use the following command to change the password.Sudo chpasswd -cusername:passwordpress ctrl+d
vishpri
- Apr 16th, 2008
Run pwdck command at the command line.this command will ensure the consistency with all the user authentication files like1. /etc/security/passwd2. /etc/passwd3. /etc/security/login.cfg4. /etc/security/user
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Difference - Loading and Linking?
harsha419
- Jul 7th, 2009
A linker takes several object files and libraries as input and produces one executable object file (or) Linking is simply the process of placing the address of a called function into the calling funct...
abhishek
- Jan 2nd, 2007
Load -> Puts the CSECT(smallest executable unit) into main memory.Linking is a different cup of tea, this is done to make a module executable.The only way you can draw a relation between is wh...
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How do you mount Linux partition on windows
tonan
- Jul 3rd, 2009
In order to mount LINUX partitions on Windows, you need to use a third party software, Windows does not provide any inbuilt utility for this. Unlike "mount" in UNIX/LINUX Windows does not provide you with a utility to access any other file system.
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Hello does anyone know how to do the following using some simple unix if possible:I have a file with the following info as comma separated. It shows username, id number and what subjects they are enrolled in. The subjects are separated by colons. UserName,ID,Subjectjsmith,235456939,MATH29879:PHYS45979jdoe,750378929,ENGL36899:JAPN92576I want it to have one username with one course per line. So that it would look like:jsmith,235456939,MATH29879jsmith,235456939,PHYS45979jdoe,750378929,ENGL36899jdoe,750378929,JAPN92576Does anyone have any ideas?Thnx-J
ppravinreddy
- Aug 30th, 2007
use below command:$ cat t.txtjsmith,235456939,MATH29879:PHYS45979jdoe,750378929,ENGL36899:JAPN92576$ cat t.txt|sed "s/:/,/g"|awk -F"," '{OFS=","; print $1,$2,$3;print...
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How to find some particular lines in unix Vi editor which starts with a particular word and end with another particular word?? For ex - There are 10 lines in the editor and only 4 lines start with the word APPLE and end with the word MANGO.Now how to find out these particular lines in Unix?
Orions
- Dec 28th, 2006
'esc` then :/word-to-find then `enter`
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What is meant by u-area? Where it resides? What does it contain?
akki1af1
- May 21st, 2009
Every process has a private u area, yet the kernel acesses it as if there were only one u area in the system, that of the running process. The kernel changes its virtual address translation map accord...
gthosani1
- Dec 19th, 2007
The u area. In addition to the text, data, and stack segment, the OS also maintains for each process a region called the u area (User Area). The u area contains information specific to the process (e...
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Open Source
What is the meaning of open source? How it is associated with the meaning of heavily documented?
siddharthb
- Apr 29th, 2009
Yes and Open Source Software refers to provision of source code for customization as per your need, for which good documentation is essential.Also Detailed documentation about licencing type is expected to be included.eg, GPLv2, GPLv3, Apache common Licence etc ...
mahendraselvi
- Jan 23rd, 2009
Computer software for which the source code is freely available .You can customize as per you needs.
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What is semaphore?What is Monitor?
bsmanyan
- Jan 29th, 2009
A hardware or software flag. In multitasking systems, a semaphore is a variable with a value that indicates the status of a common resource. It's used to lock the resource that is being used. A pr...
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Where is kernel located in HP unix?
Jitendra Katiyar
- Jan 3rd, 2007
It is inside /stand directory with name of "vmunix".
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UNIX Interview Questions
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