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Full Discussion: Why is ./ sometimes needed?
Top Forums Shell Programming and Scripting Why is ./ sometimes needed? Post 303029669 by wisecracker on Wednesday 30th of January 2019 10:16:08 AM
Old 01-30-2019
Quote:
Originally Posted by Xubuntu56
I appreciate the help; I've learned a lot!

Here`s the original script, which I did not write.



Code:
#!/bin/bash
 

# Proper header for a Bash script
# cleanup2: improved
# Run as root, of course.
# Insert code here to print error message and exit if not root.

LOG_DIR=/var/log
# Variables are better that hard-coded values.
cd $LOG_DIR

cat /dev/null > messages
cat /dev/null > wtmp

echo "Logs cleaned up."

exit    #  The right and proper method of "exiting" from a script.
        # A bare "exit" (no parameter) returns the exit status
        #+ of the preceding command.

IS THAT IT, (and needs to be run from root)?
Why use:
Code:
cat /dev/null > messages
cat /dev/null > wtmp

When:
Code:
: > messages
: > wtmp

......is much simpler.
Useless use of cat?
No disrespect to you Xubuntu56, you are innocent of this one...
BUT THAT........
........guys was the improved version, what was the original like I wonder!
Last edited by wisecracker; 01-30-2019 at 11:29 AM..
This User Gave Thanks to wisecracker For This Post:
Xubuntu56
 

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LEARN ABOUT LINUX

gnomevfs-cat

gnomevfs-cat(1)                                                    User Commands                                                   gnomevfs-cat(1)

NAME

       gnomevfs-cat - print a file to standard output using the VFS system

SYNOPSIS

       gnomevfs-cat URI

DESCRIPTION

       gnomevfs-cat prints a file to standard output using the virtual file system to access the file via a URI.

OPERANDS

       The following operands are supported:

       URI             Specifies the file location in standard URI format.

EXAMPLES

       Example 1: Cat a File From a Web Server

       example% gnomevfs-cat http://www.sun.com

       Example 2: Cat a Local File

       example% gnomevfs-cat file:///home/user/README.txt

ENVIRONMENT VARIABLES

       See environ(5) for descriptions of the following environment variables: NLSPATH.

EXIT STATUS

       The exit value 0 is returned regardless of success or failure.

FILES

       The following files are used by this application:

       /usr/bin/gnomevfs-cat   Executable to print a file to standard output using the VFS system

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE         |      ATTRIBUTE VALUE        |
       +-----------------------------+-----------------------------+
       |Availability                 |SUNWgnome-vfs                |
       +-----------------------------+-----------------------------+
       |Interface stability          |External                     |
       +-----------------------------+-----------------------------+

SEE ALSO

       gnomevfs-copy(1), gnomevfs-info(1), gnomevfs-ls(1), gnomevfs-mkdir(1)

NOTES

       Written by Stephen Browne, Sun Microsystems Inc., 2004.

SunOS 5.10                                                          6 Sep 2004                                                     gnomevfs-cat(1)
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