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What happens when a compress command is used in UNIX system?
compress command is used for compressing a file that is for making the file size compact so that it becomes small. When a compress command is used in UNIX all the file attributes like the owner of the file and other things remain same except the file size is compressed and the extension of the file becomes .ZThe general syntax for compressing file iscompress filenameFor instance if one like to compress...
SureshBV
- Mar 7th, 2007
Exactly as in the above comment Compress command is for compressing the file and it can uncompress when ever required.compress <filename> - to compressuncompress <filename> - to uncompress...
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What is meant by shell layer manager?
Shell layer manager is also called as shl in short. This utility is used for running number of scripts simultaneously at the same time in a single terminal. This utility plays a very important role in UNIX operating system because as we all know UNIX is a multi-programming operating system. So in other words there many be many instances or occurrences in which the users in the UNIX operating system...
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What is the difference between the commands sleep, wait and killall?
sleep:
This command is used in UNIX operating system to suspend execution of the system for the specified time limit mentioned in it as parameter.
The general format of sleep command is
sleep no_of_seconds
The sleep suspends the execution of the shell in UNIX operating system for the no_of seconds specified.
For instance
sleep... -
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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How does the Kernel in a Linux system differ from a Windows Kernel
siva2sk
- Feb 24th, 2007
got to think from OS and usage perspectives..(i am a linux & unix guy, so my explanation may seem anti-wdos)linux - monolithic kernel, open source, 1000s of reviewers, supports loadable kernel mod...
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Explain design philosophy of UNIX operating system and explain the mechanism of inter process communication and synchronisation.
rajanikanth.ha
- Aug 26th, 2008
The inter process communication is a way of communication between the processes. In UNIX these are achieved through pipes (named & unnamed pipes), semaphores, message queues, shared memory.
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What are Trace files and Log Files in Unix and How do they help in conducting back end testing?
Amit Shiknis
- Dec 8th, 2007
Hope this does anser your question - General System Information Tools/Utilitiesuname -a -- brief OS and kernel information. dmesg -- kernel messages given during booting. cat /var/log/messages -- is t...
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Inter process command
inter process command in UNIX be achieved by a)pipes b)messages c)semaphores d)shared memory e)all
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UNIX Maximum simultaneous logins
how many simultaneous logins are allowed in Linux/Solaris for a single user ?
Amit Shiknis
- Dec 10th, 2007
The Linux PAM (Pluggable Authentication Modules) where we can set useful limits for users or login, which can be configured in the /etc/security/limits.conf file.You can control the total limitation w...
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Unix & Aix
Unix & Aix what's the difference between the two.
vishpri
- Apr 24th, 2008
AIX is one of the favours of Unix and is developed by IBM. AIX stands for Advanced Interactive Executive. This name came because of an advanced feature(tool) introduced in ...
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UNIX questions
How do u configure the Disk?Tell me Steps to configure the VG?How do u add a new disk in VG?What are the Attributes of LVM?Describe about LVM Adva/Dis.Adv?How do u find the fix is installed?How to u extend the FS?Attributes of FS?List all the LV in system?How do u find the PP size of the VG?How do u create the pp size of 32 MB in VG?What is the Limitation of VG?How do u disable the paging space?What...
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UNIX Commands questions
1. Why is the . not included in the path?2. How will you mirror a volume and how will you find if a volume is mirrored ? lsvg –l (vol gp name)3. A system is echoing the ping but not able to login via telnet why ?Etc /services etc/inetd.conf4. what is the migration path from 4.3 to 5.1 ? (or any versions)5. A system is able to ping within the network but not outside why ?6. What are the components of...
goksn
- Sep 6th, 2009
Telnet is not secured but SSH is secured. Telenet and FTP can be easily traced by hackers where as SSH (which uses SSL) cannot be easily traced.
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How to set Windows as Default OS when Dual Booting Ubuntu?
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Editorial / Best Answer
suji- Member Since Sep-2005 | Apr 12th, 2011
Command is - sudo gedit /boot/grub/menu.lst
This will show output as -
## default num
# Set the default entry to the entry number NUM. Numbering starts from 0, and
# the entry number 0 is the default if the command is not used.
#
# You can specify 'saved' instead of a number. In this case, the default entry
# is the entry saved with the command 'savedefault'.
# WARNING: If you are using dmraid do not change this entry to 'saved' or your
# array will desync and will not let you boot your system.
default 0
The important line is the last one. You will need to change that number 0 to match the Windows boot section. Typically it's always going to be 4 on a default dual-boot configuration. Change this value to 4, and then save and reboot your machine. You should go into Windows instead of Ubuntu automatically.
suji
- Apr 12th, 2011
Command is - sudo gedit /boot/grub/menu.lstThis will show output as - ## default num# Set the default entry to the entry number NUM. Numbering starts from 0, and# the entry number 0 is the default ...
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How will you mirror a volume and how will you find if a volume is mirrored ? lsvg –l (vol gp name)
deenadayalan_d
- Jan 30th, 2010
We can find whether mirrored or not by seeing number of pps, if number of pps is double the size of pp size then it is mirrored. to mirror # mirrorvg vgname diskname
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Print Using string copy and concate Commands
How will you print TATA alone from TATA POWER using string copy and concate commands in C?
Sandhya.Kishan
- Jun 15th, 2012
Include
#include
#include
int main()
{
char myString[] = "TATA POWER";
char output[10];
strcpy(output,myString);
output[4] = ;
printf("OUTPUT :%s
", output);
printf("ORGINAL STRING :%s", myString);
getch();
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UNIX File Access
The syntax of command statement in UNIX 10. If the permission for a file is 000, then the file can be accessed by whom?
UNIX Interview Questions
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Ans