10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
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.... (5 Replies)
Discussion started by: dakota
5 Replies
2. Shell Programming and Scripting
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? (2 Replies)
Discussion started by: bashily
2 Replies
3. Shell Programming and Scripting
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 (1 Reply)
Discussion started by: justlooks
1 Replies
4. Shell Programming and Scripting
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 $#... (2 Replies)
Discussion started by: MaindotC
2 Replies
5. Homework & Coursework Questions
1. The problem statement, all variables and given/known data:
I have a retake assignment to complete for my computer networks and OS class. This isn't really my area, had I known last year I could have swapped it for a different module I would have done so. I'm determined to get through it... (6 Replies)
Discussion started by: Squall Moogle
6 Replies
6. Shell Programming and Scripting
hi all i have an example i want one help me to understand cause i tried to test it but almost fail and i don't know how can i solve this problem " the main idea to read from two files and replace something from one to another " but i don't understand why it fail all time
$ cat main.txt... (4 Replies)
Discussion started by: maxim42
4 Replies
7. UNIX for Dummies Questions & Answers
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 (2 Replies)
Discussion started by: appsdba.nitin
2 Replies
8. Shell Programming and Scripting
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... (1 Reply)
Discussion started by: mail2sant
1 Replies
9. Shell Programming and Scripting
I did not understand what is ${0##/}
PGM=${0##/}
TMP=/tmp/${PGM}.$$
Please explain me. (2 Replies)
Discussion started by: gadege
2 Replies
10. Shell Programming and Scripting
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 Replies)
Discussion started by: dummy_needhelp
2 Replies
explain_fopen_or_die(3) Library Functions Manual explain_fopen_or_die(3)
NAME
explain_fopen_or_die - open file and report errors
SYNOPSIS
#include <libexplain/fopen.h>
FILE *explain_fopen_or_die(const char *pathname, const char *flags);
DESCRIPTION
The explain_fopen_or_die() function opens the file whose name is the string pointed to by pathname and associates a stream with it. See
fopen(3) for more information.
This is a quick and simple way for programs to constitently report file open errors in a consistent and detailed fahion.
RETURN VALUE
Upon successful completion explain_fopen_or_die returns a FILE pointer.
If an error occurs, explain_fopen will be called to explain the error, which will be printed onto stderr, and then the process will termi-
nate by calling exit(EXIT_FAILURE).
SEE ALSO
fopen(3)
stream open functions
explain_fopen(3)
explain fopen(3) errors
exit(2) terminate the calling process
COPYRIGHT
libexplain version 0.52
Copyright (C) 2008 Peter Miller
AUTHOR
Written by Peter Miller <pmiller@opensource.org.au>
explain_fopen_or_die(3)