Recent questions tagged Linux

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linux - Setting up a cronjob on Google Compute Engine

I am new to setting up cronjobs and I'm trying to do it on a virtual machine in google compute engine. ... to set up this cronjob correctly? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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linux - How do 2 or more fork system calls work?

Here's a code where I use 2 fork() system calls one after another - How does it actually work? #include <unistd ... 26752 3. I am process 27116 See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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linux - error in shell scripting?

I am trying a code in shell script. while I am trying to convert the code from batch script to shell ... Any suggestion or lead is appreciated. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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linux - get a substring from a file shell script

I need a little help with this shell script. I have a variable, represents a IP/TCP header. I need filter a ... .58363 > 239.255.255.250.1900 See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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linux - Hosting Two Website Under one Web App - Azure Services

I want to deploy multiple websites on a single azure website. I have tried to deploy multiple websites on the ... child project to example.com See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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linux - bash shell script variable assignment

I am trying to assign an array length to a variable. servers=(apple orange) len = ${#servers[@]} it says len command not found. why? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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linux - Assign environment variables from bash script to current session from Python

I have many bash scripts to help set my current session environment variables. I need the env variables set ... similar within a python script? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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linux - NameNode: java.net.BindException

hi folks i am stucked in very strange problem.I am installing HBase and hadoop on another VM by accessing it from ... have an idea- Thnaks alot See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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520 views

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linux - Print Field 'N' to End of Line

I would like to have help or direction on a problem I have in awk. I have a tab-delimited file with more ... fields per line is not standard. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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linux - How to create a MySQL database from dump file in expect/TCL script?

I just wanted to execute this bash command in expect script: mysql -u root -h localhost -proot dbTest < temp. ... help me to solve this issue? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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763 views

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linux - using awk to check between two dates

I have a file with multiple data structures in it like so: eventTimestamp: 2010-03-23T07:56:19.166 result: ... comparison part of the script. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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782 views

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linux - Increment date with AWK for few days and months

Increment date with AWK Hi all, I need your help. I have a file "test.csv" and I want to increase the ... one month. Hope somebody can help. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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linux - Bash: run an executable file in background

I have an executable file that contains a long loop, so I want to run it in background, how do I do that ... these key pressing in bash script? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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linux - bash store output as a variable

grep -A 26 "some text" somefile.txt | awk '/other text/ { gsub(/M/, " "); print $4 }' | sort -n -r ... how do I store the output as a variable? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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linux - How can I *only* get the number of bytes available on a disk in bash?

df does a great job for an overview. But what if I want to set a variable in a shell script to the number of ... /), not the whole df output. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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780 views

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linux - Segmentation fault due to lack of memory in C

This code gives me segmentation fault about 1/2 of the time: int main(int argc, char **argv) { float test[ ... I am using Linux Ubuntu 9.10 See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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702 views

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linux - Save and restore terminal content

I am writing automation scripts (perl/bash). Many of them benefit from some basic terminal GUI. I figured I ... posted elsewhere. Thanks :) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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649 views

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linux - extract text from xml documents in python

This is the sample xml document : <bookstore> <book category="COOKING"> <title lang="english">Everyday Italian< ... are different. Please Help!! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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485 views

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linux - calculate and print the average value of strings in a column

I got a .txt file with 2 columns of values. They are 2D coordinates, so the first column represent the x ... linux command line could be good. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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597 views

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linux - How do I rename multiple files beginning with a Unix timestamp - imapsync issue

I didn't got the script from imapsync to rename maildir filenames to work. :-/ So what I need is: I have a ... me with this script? Thank you! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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544 views

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linux - How I open remote server folder using python?

How to Open the remote server folder > inside the folder only images store we read all the images. Server ... this code So please kindly reply See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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560 views

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linux - Shell script, saving the command value to a variable

I am trying to print the value of VARI in the same line followed by a comma, so that i can have a csv ... know what i am doing wrong, thanks! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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621 views

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linux - Accessing global variables in pthreads in different c-files

I have a main.c with a global variable called int countboards. In the main() I start a pthread, that ... countboards has the new value } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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649 views

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linux - How to mount a USB drive on Android Things?

I'm attempting to read files off of a USB drive for an Android Things app on a Raspberry Pi. I'm able to ... drive and access the files on it? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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linux - Bash pass variable as argument with quotes

Assume ./program is a program that just prints out the parameters; $ ./program "Hello there" Hello there How ... in the first code block? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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492 views

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linux - Script cannot find file

I am trying to run a script named myscript.command on a Mac/Linux machine. #!/bin/sh echo 'Starting' chmod 777 ... via double click in the UI. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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666 views

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linux - How do I get multi-line string between two braces containing a specific search string?

I'm looking for a quick and easy one-liner to extract all brace-delimited text-blocks containing a search string ... What am I missing here? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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linux - What is partition checker in ARM Secure Mode

As per this link http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0333h/Chdfjdgi.html under ... what is its programming model ? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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