Could anyone help explain this? Post: 302343404

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1. Shell Programming and Scripting

please explain this

zsh 4.3.4% cat file ACFCFACCACARCSHFARCVJVASTVAJFTVAJVGHBAJ zsh 4.3.4% cat file1 A C F R zsh 4.3.4% <file1 while read;do printf "%s=%d\n" "$REPLY" "${#$(<file)//}";done A=9 C=7 F=4 R=2 That was the previous post. But , can anybody can explain me in detail about this line zsh...

2. Shell Programming and Scripting

Please can any one explain this ${0##/}

I did not understand what is ${0##/} PGM=${0##/} TMP=/tmp/${PGM}.$$ Please explain me.

3. Shell Programming and Scripting

please explain the below

could u please convert the below statement to shell script ---------- logdir=/smp/dyn/logfiles/cpm/pgm/pgIm $logdir = $logdir ."/pgIm${toDate}*"; ---- could u please explain the below clearly grep -i adding $logdir | grep -iv equation | awk '{print \$NF}' | sort -u | sed -e...

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can anyone explain this?

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Please explain this

if then echo "Syntax: $0 <sid> <COLD/HOT> <DEST>" exit fi if --------------what does this mean??? echo "Syntax: $0 <sid> <COLD/HOT> <DEST>"---pls explain this as well

6. Shell Programming and Scripting

can any one explain this example

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7. Shell Programming and Scripting

Explain $# please

I'm trying to follow a script and I see it begins with this: if ; then if ; then print "blah $0 blah blah " exit fi fi What does $# mean? I found out that $1 refers to the shell environment and the last argument that was entered or passed in the previous command. I couldn't find $#...

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anyone can explain this?

why the case 2 will happen ? , ' should stop the history substitution ,shouldn't it? case 1 # echo "123"|sed '/123/!d' 123 case 2 # echo "123 > 456 > 1 > "|sed '/123/!d' -bash: !d': event not found case 3 # echo "123 > 456 > 12 > "|sed '/123/'\!d 123 # bash --version

9. Shell Programming and Scripting

Can someone explain this for me?

Can someone do me a favour and explain the following for me: ((r=$RANDOM%$n+1)) I know what $RANDOM does but what is % sign and what does it do with %$n+1?

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How I can explain this?

Hi friends! I'm learning UNIX and I have a small question. Working with Shell, i put the name of one executable (in c language) + one number and it says this: $ gcc misterioso_4.c $ ./misterioso_4 6 got: , I can not find an answer in the manual because I havent applied any variable....

LEARN ABOUT REDHAT

siggen

SIGGEN(8)						      System Manager's Manual							 SIGGEN(8)

NAME

       siggen - signature gathering routine for Tripwire

SYNOPSIS

       siggen [ options... ] file1 [ file2... ]

       Options:

	    -t	       --terse
	    -h	       --hexadecimal
	    -a	       --all
	    -C	       --CRC32
	    -M	       --MD5
	    -S	       --SHA
	    -H	       --HAVAL

DESCRIPTION

       siggen is a utility that displays the hash function values for the specified files.

OPTIONS

       -t, --terse
	      Terse mode.  Prints requested hashes for a given file on one line, delimited by spaces, with no extraneous information.

       -h, --hexadecimal
	      Display results in hexadecimal rather than base64 notation.

       -a, --all
	      Display all hash function values (default).

       -C, --CRC32
	      Display CRC-32, POSIX 1003.2 compliant 32-bit Cyclic Redundancy Check.

       -M, --MD5
	      Display MD5, the RSA Data Security, Inc. Message Digest Algorithm.

       -S, --SHA
	      Display SHA, Tripwire's implementation of the NIST Secure Hash Standard, SHS (NIST FIPS 180).

       -H, --HAVAL
	      Display Haval value, a 128-bit hash code.

       file1 [ file2... ]
	      List of filesystem objects for which to display values.

VERSION INFORMATION

       This man page describes siggen version 2.3.1.

AUTHORS

       Tripwire, Inc.

COPYING PERMISSIONS

       Permission  is granted to make and distribute verbatim copies of this man page provided the copyright notice and this permission notice are
       preserved on all copies.

       Permission is granted to copy and distribute modified versions of this man page under the conditions for verbatim  copying,  provided  that
       the entire resulting derived work is distributed under the terms of a permission notice identical to this one.

       Permission  is  granted to copy and distribute translations of this man page into another language, under the above conditions for modified
       versions, except that this permission notice may be stated in a translation approved by Tripwire, Inc.

       Copyright 2000 Tripwire, Inc. Tripwire is a registered trademark of Tripwire, Inc. in the United States and  other  countries.  All  rights
       reserved.

SEE ALSO

       twintro(8), tripwire(8), twadmin(8), twprint(8), twconfig(4), twpolicy(4), twfiles(5)

								    1 July 2000 							 SIGGEN(8)

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please explain this

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Please can any one explain this ${0##/}

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please explain the below

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can anyone explain this?

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