Sponsored Content
Top Forums Shell Programming and Scripting Understand Bash scripting encryption Post 302236297 by broli on Monday 15th of September 2008 09:12:05 AM
Old 09-15-2008
In that particular case, the "in" word is a reserved word.
someone, while developing bash, decided to make it so.
the loop structure requires some special words to fit in all the options.
"for" is a reserved words that tells bash, a loop is about to be "declared"
the next param, is the variable that bas will use to hold the step
in tells bash that the next thing is the list to go trough. one loop for each object. on each iteration, the current value is asigned to the variable after the for but before the in
(all this is in the link frankling posted)

that "kid smashing the keybord" is caled "fork bomb"
is a clever way to name functions with weird names (like : ), more data here
Fork bomb - Wikipedia, the free encyclopedia

but the advanced bash scripting guide is very very good, and im sure it has most of what you want.
 

9 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

File encryption/Key encryption ????

My dilemma, I need to send, deemed confidential, information via e-mail (SMTP). This information is sitting as a file on AIX. Typically I can send this data as a e-mail attachment via what we term a "mail filter" using telnet. I now would like to somehow encrypt the data and send it to a e-mail... (1 Reply)
Discussion started by: hugow
1 Replies

2. Shell Programming and Scripting

bash shell: 'exec', 'eval', 'source' - looking for help to understand

Hi, experts. Whould anybody clear explay me difference and usage of these 3 commands (particulary in bash) : exec eval source I've tryed to read the manual pages but did not get much. Also could not get something useful from Google search - just so much and so not exactly, that is... (3 Replies)
Discussion started by: alex_5161
3 Replies

3. Shell Programming and Scripting

I want to understand bash better

Hi everyone, I have some questions regarding bash and my initializer files: when I look at my bashrc file, I see lots of "export".. export MAGICK_HOME="$HOME/bin..etc".. what does export really mean? in my bashrc, I have a line: "umask 0002" ... what does that do? I have a bash_profile... (6 Replies)
Discussion started by: patrick99e99
6 Replies

4. Shell Programming and Scripting

Do not understand why my while loop fail (bash)

Hi again :) I still need your help now... #!/bin/bash SIZE=`ls -s text.txt` while do done My problem is that the line "while ..." still print the same value after the first loop. In one instruction change the size of text.txt I've run my bash script in debug mode, and the... (6 Replies)
Discussion started by: Link_
6 Replies

5. UNIX for Dummies Questions & Answers

Another Simple BASH command I don't understand. Help?

I have a text file called file1 which contains the text: "ls -l" When I enter this command: bash < file1 > file1 file1 gets erased. However if I enter this command: bash < file1 > newfile the output from "ls -l" is stored in newfile. My question is why doesn't file1's text ("ls -l") get... (3 Replies)
Discussion started by: phunkypants
3 Replies

6. Shell Programming and Scripting

Learning curve to understand bash iteration

Hi Folks, I know on one side there is script and on another side there is smart script. I am able to achieve what I got but thought there has to be a code which doesn't require multiple lines. So if you guys can help me out than it will be awesome. Also I wrote in cshell but if can get both the... (4 Replies)
Discussion started by: dixits
4 Replies

7. Cybersecurity

File encryption tools with MAC address as an encryption key

Hi all, I'm looking for secure file encryption tools that use MAC address as encryption key. FYI, I'm using Red Hat Enterprise Linux OS. For example: when A wants to send file to B A will encrypt the file with B's computer MAC/IP address as an encryption key This file can only be decrypted... (2 Replies)
Discussion started by: sergionicosta
2 Replies

8. Shell Programming and Scripting

I am learning shell scripting and i would like to understand how sort -k3,3 -k 4,4 short* works

Please help me understand how sort -k3,3 -k 4,4 short* works , is it sorting 3 and 4 th field ? what is the use of specifying 3,3 and 4,4 in sort and what is actually does and i see sort -k3 short* and sort -k3,3 -k 4,4 short* giving the same output. Sort output attached Please help (2 Replies)
Discussion started by: Antony Ankrose
2 Replies

9. Shell Programming and Scripting

How to understand special character for line reading in bash shell?

I am still learning shell scripting. Recently I see a function for read configuration. But some of special character make me confused. I checked online to find answer. It was not successful. I post the code here to consult with expert or guru to get better understanding on these special characters... (3 Replies)
Discussion started by: duke0001
3 Replies
BASHBUG(1)						      General Commands Manual							BASHBUG(1)

NAME
bashbug - report a bug in bash SYNOPSIS
bashbug [--version] [--help] [email-address] DESCRIPTION
bashbug is a shell script to help the user compose and mail bug reports concerning bash in a standard format. bashbug invokes the editor specified by the environment variable EDITOR on a temporary copy of the bug report format outline. The user must fill in the appropriate fields and exit the editor. bashbug then mails the completed report to bug-bash@gnu.org, or email-address. If the report cannot be mailed, it is saved in the file dead.bashbug in the invoking user's home directory. The bug report format outline consists of several sections. The first section provides information about the machine, operating system, the bash version, and the compilation environment. The second section should be filled in with a description of the bug. The third sec- tion should be a description of how to reproduce the bug. The optional fourth section is for a proposed fix. Fixes are encouraged. ENVIRONMENT
bashbug will utilize the following environment variables if they exist: EDITOR Specifies the preferred editor. If EDITOR is not set, bashbug defaults to emacs. HOME Directory in which the failed bug report is saved if the mail fails. TMPDIR Directory in which to create temporary files and directories. SEE ALSO
bash(1) AUTHORS
Brian Fox, Free Software Foundation bfox@gnu.org Chet Ramey, Case Western Reserve University chet@po.cwru.edu GNU Bash-4.0 1998 July 30 BASHBUG(1)
All times are GMT -4. The time now is 04:34 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy