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Linux :: How do you terminate an ongoing process?

posted Feb 19, 2013, 9:56 PM by Ashish Jain

Every process in the system is identified by a unique process id or pid. Use the kill command followed by the pid in order to terminate that process. To terminate all process at once, use kill 0.

Linux :: What are the kinds of permissions under Linux?

posted Feb 19, 2013, 9:56 PM by Ashish Jain

There are 3 kinds of permissions under Linux:
- Read: users may read the files or list the directory
- Write: users may write to the file of new files to the directory
- Execute: users may run the file or lookup a specific file within a directory

Linux :: Why some file names are preceded by a dot in Linux?

posted Feb 19, 2013, 9:55 PM by Ashish Jain

In general, filenames that are preceded by a dot are hidden files. These files can be configuration files that hold important data or setup info. Setting these files as hidden makes it less likely to be accidentally deleted.

Linux :: What is the maximum length for a filename under Linux?

posted Feb 19, 2013, 2:41 AM by Ashish Jain

Any filename can have a maximum of 255 characters. This limit does not include the path name, so therefore the entire pathname and filename could well exceed 255 characters.

Linux :: What are hard links in Linux?

posted Feb 19, 2013, 2:40 AM by Ashish Jain

Hard links point directly to the physical file on disk, and not on the path name. This means that if you rename or move the original file, the link will not break, since the link is for the file itself, not the path where the file is located.

Linux :: What are symbolic links in Linux?

posted Feb 19, 2013, 2:40 AM by Ashish Jain

Symbolic links act similarly to shortcuts in Windows. Such links point to programs, files or directories. It also allows you instant access to it without having to go directly to the entire pathname.

Linux :: How to get information about memory consumption in Linux?

posted Feb 19, 2013, 2:39 AM by Ashish Jain

Run command "cat /proc/meminfo", this will display detail information about memory utilization. The information comes in the form of both high-level and low-level statistics.

Linux :: What is the basic difference between BASH and DOS?

posted Feb 18, 2013, 2:06 AM by Ashish Jain

The key differences between the BASH and DOS console lies in 3 areas:
  • BASH commands are case sensitive while DOS commands are not;
  • under BASH, / character is a directory separator and \ acts as an escape character. Under DOS, / serves as a command argument delimiter and \ is the directory separator
  • DOS follows a convention in naming files, which is 8 character file name followed by a dot and 3 character for the extension. BASH follows no such convention.

Linux :: What is Linux Kernel?

posted Feb 18, 2013, 2:06 AM by Ashish Jain

The Linux Kernel is a low-level systems software whose main role is to manage hardware resources for the user. It is also used to provide an interface for user-level interaction.

Linux :: What is BASH?

posted Feb 18, 2013, 2:05 AM by Ashish Jain

BASH is short for Bourne Again SHell. It was written by Steve Bourne as a replacement to the original Bourne Shell (represented by /bin/sh). It combines all the features from the original version of Bourne Shell, plus additional functions to make it easier and more convenient to use. It has since been adapted as the default shell for most systems running Linux.

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