10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi,
Im trying to write a Bash script that calculates the least common subnet for two address.
Theoretical: I have to change IP from decimal to binary, then apply XNOR on the two IPs.
I tried to write this:
#!/bin/bash
echo "Ebter the first ip"
read ip1
echo "Enter the second ip"
read... (7 Replies)
Discussion started by: Miron
7 Replies
2. UNIX for Dummies Questions & Answers
#!/bin/bash
if &&
then
echo "True"
else
echo "False"
fi
Hi everyone, I am new to UNIX, here I have a if statement elevating two boolean conditions. I thought the output should be True because there are + in the statement. But it turns out to be False.
Can anyone... (3 Replies)
Discussion started by: mryuyu1111
3 Replies
3. Shell Programming and Scripting
hi, im learning python language. and my teacher gives me this question on class:
Boolean expression :
not (p or not q)
what is the correct answer for that? i still dont understand, and please give me a link for a new beginner in python to learn.
thanks (1 Reply)
Discussion started by: jazzyzha
1 Replies
4. Shell Programming and Scripting
Dear all,
IT seems to be rather small issue, but is not resolved. What Google suggest does no work..!
#!/bin/bash
date
jobNo=$(awk '/Jobs with... (4 Replies)
Discussion started by: emily
4 Replies
5. Shell Programming and Scripting
Can someone, please, help me to make this condition valid/accepted in bash?
I really cannot.
I'm stuck with the brackets...
This one tells me: missing `]'
if ]; then
# NOTIFY ERROR...
fi
And... I'd also appreciate a link to bash documents that explain these things. All... (2 Replies)
Discussion started by: mamboknave
2 Replies
6. Homework & Coursework Questions
1. The problem statement, all variables and given/known data:
Im experimenting with if expressions for an assignment. What i want to do is check if an input of read x y z will be checked against x for 1-999 for y for and for z for 1-999. Am i doing this right? or perhaps you could tell me... (0 Replies)
Discussion started by: Ren_kun
0 Replies
7. UNIX for Advanced & Expert Users
I was reading this find guide and I saw something with the -and option that I don't think is correct. Do you need the -and option in this?
$ find /mp3-collection -name 'Metallica*' -and -size +10000k I found my file that was bigger than 500 MB with and without the -and option.
~ $ find /... (1 Reply)
Discussion started by: cokedude
1 Replies
8. Shell Programming and Scripting
Hi everybody:
I'm working on a script to send emails with logs attached based on one single rule..."check if the number of errors has increased since the last time the script ran"
Basically what my script does is read from a previous file with the last trace of errors the previous error... (3 Replies)
Discussion started by: hyunkel_01
3 Replies
9. Shell Programming and Scripting
Hi there,
Sorry if the title doesn't mean much to you, I don't know how to sum up my pb in one line.
I'd like to set a value to 0 or 1 depending on the result of a comparison. Here's what I do:
supernova:~# a=
supernova:~# isempty=$(] && echo 1 || echo 0)
supernova:~# echo $isempty
1... (4 Replies)
Discussion started by: chebarbudo
4 Replies
10. Shell Programming and Scripting
I have a file coming in with many columns, but the first character of the the coumn is a record type, if I wanted to get a true/false kind of response as to whether it contains at least one of each type of record how would be best?
sed -e '/01/!d; /02/!d; /03/!d; /04/!d' datafile
returns... (4 Replies)
Discussion started by: badg3r
4 Replies
true(1) General Commands Manual true(1)
NAME
true, false - Returns a standard exit value
SYNOPSIS
true
false
STANDARDS
Interfaces documented on this reference page conform to industry standards as follows:
true: XCU5.0
false: XCU5.0
Refer to the standards(5) reference page for more information about industry standards and associated tags.
DESCRIPTION
The true command returns a 0 (zero) exit value. The false command returns a nonzero exit value. These commands are usually used in input to
shell commands.
NOTES
The special built-in utility : (colon) is sometimes more efficient than the true command.
EXIT STATUS
[Tru64 UNIX] The nonzero value returned by the false command may vary from system to system.
EXAMPLES
To construct a loop in a shell procedure, enter: while true do date sleep 60 done
This procedure displays the date and time once a minute. To stop it, press the Interrupt key sequence.
SEE ALSO
Commands: csh(1), ksh(1), Bourne Shell sh(1b), POSIX shell sh(1p)
Standards: standards(5)
true(1)