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  • bash split text into limited character buckets (array member)

    - by soField
    i have text such as http://pastebin.com/H8zTbG54 we can say this text is set of rules splitted by "OR" at the end of lines i need to put set of lines(rules) into buckets (bash array members) but i have character limit for each array member which is 1024 so each array member should contain set of rules but character count for each array member can not exceed 1024 can anybody help me to do that solaris 10

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  • Reading a subset of the lines in a text file, with bash

    - by Markus
    Hi! I have a file line a - this is line a line b - this is line b line c - this is line c line d - this is line d line e - this is line e The question is: How can I output the lines starting from "line b" till "line d" using bash commands? I mean, to obtain: "line b - this is line b line c - this is line c line d - this is line d"

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  • How to create a CPU spike with a bash command

    - by User1
    I want to create a near 100% load on a Linux machine. It's quad core system and I want all cores going full speed. Ideally, the CPU load would last a designated amount of time and then stop. I'm hoping there's some trick in bash. I'm thinking some sort of infinite loop.

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  • Get color output in bash

    - by Werner
    Hi, when compiling some projects on linux terminal, I get usually a long output consisting of a lot of information. Usually this information is MONOCHROME. I wonder if bash can be modified somehow, so in all outputs or in some specific outputs (like from Makefile, etc) I can get different colors dependeing on, for instance: make[1]: Leaving directory or g++ -DHAVE_CONFIG_H -I. etc. Thanks

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  • List files that don't match a string in bash

    - by Javier
    Dear all, I'm a newbie in bash and I would like to pass as parameter to a python function all files in a directory that don't match a given pattern. sth. like: $myscripts/myprog.py $myfiles/!(bonjovi) The above example should retrieve all files that don't match to "bonjovi". Best wishes

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  • Append or modify keys in conf files using sed/bash one-liner

    - by Jeff
    I often have to modify files such as sysctl.conf, and I'm familiar with using sed to replace existing values. Is there a way to append the new key/value pair to the file if sed wasn't able to replace it? For instance, using this example: modify config file using bash script sed -c -i "s/\($TARGET_KEY *= *\).*/\1$REPLACEMENT_VALUE/" $CONFIG_FILE How could I add the $TARGET_KEY = $REPLACEMENT_VALUE new line to $CONFIG_FILE using the same sed expression with slight changes? And on a related topic, how can I force creation of $CONFIG_FILE if it didn't exist?

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  • Float conditional in bash

    - by Werner
    Hi, in bash I need to compare two float numbers, one which I define in the script and the other read as paramter, for that I do: if [[ $aff -gt 0 ]] then a=b echo "xxx "$aff #echo $CX $CY $CZ $aff fi but I get the error: [[: -309.585300: syntax error: invalid arithmetic operator (error token is ".585300") What is wrong? Thanks

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  • Bash Read Array from External File

    - by jmituzas
    I have setup a Bash menu script that also requires user input. These inputs are wrote (appended to) a text file named var.txt like so: input[0]='192.0.0.1' input[1]='username' input[2]='example.com' input[3]='/home/newuser' Now what I am trying to accomplish is to be able to read from var.txt from a script kinda like this: useradd var.txt/${input[1]} now I know that wont work just using it for an example. Thanks in Advance, Joe

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  • kill a process in bash

    - by wyatt
    How do I kill a process which is running in bash - for example, suppose I open a file: $ gedit file.txt is there any way within the command prompt to close it? This example is fairly trivial, since I could just close the window, but it seems to come up a bit, particularly when I mistype commands. Also is there any way to escape an executable which is running? This probably has the same solution, but I thought I'd ask anyway. Thanks

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  • bash shell date parsing, start with specifc date and loop through each day in month

    - by Joe Stein
    Hi, I need to create a bash shell script starting with a day and then loop through each subsequent day formatting that output as %Y_%m_d I figure i can submit a start day and then another param for the number of days. My issue/question is how to set a DATE (that is not now) and then add a day. so my input would be 2010_04_01 6 my output would be 2010_04_01 2010_04_02 2010_04_03 2010_04_04 2010_04_05 2010_04_06 Thanks

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  • Bash command that prints a message on stderr

    - by Salman A
    I want to know if there is a built-in BASH command that prints some text on stderr, just like the echo command that prints text on stdout. I don't want to use temporary io-redirection. I use a built-in command to generate an error on stderr such as ls --asdf (ls: unrecognized option '--asdf') but I want something neater,

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  • Bash completion symfony

    - by zimyand
    How can I make symfony completion in bash? Have ubuntu 9.10. It's hard to write own alias. Anyone know where can I find it? I find http://trac.symfony-project.org/wiki/BashCompletion - but it is for symfony 1.1. Is it compatible with 1.4 ?

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  • Removing spaces from columns of a CSV file in bash

    - by vikas ramnani
    I have a CSV file in which every column contains unnecessary spaces(or tabs) after the actual value. I want to create a new CSV file removing all the spaces using bash. For example One line in input CSV file value1 ;value2 ;value3 ;value4 same line in output csv file should be value1;value2;value3;value4 I tried using awk to trim each column but it didnt work. Can anyone please help me on this ? Thanks in advance :)

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  • Convert numbers to enumeration of strings in bash

    - by User1
    Using bash, I have a list of strings that I want to use to replace an int. Here's an example: day1=Monday day2=Tuesday day3=Wednesday day4=Thursday day5=Friday day6=Saturday day7=Sunday If I have an int, $dow, to represent the day of the week, how do I print the actual string? I tried this: echo ${day`echo $dow`} but get error of "bad substitution". How do I make this work? Note: I can change the $day variables to a list or something.

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  • Printf example in bash does not create a newline

    - by WolfHumble
    Working with printf in a bash script, adding no spaces after "\n" does not create a newline, whereas adding a space creates a newline, e. g.: No space after "\n" NewLine=`printf "\n"` echo -e "Firstline${NewLine}Lastline" Result: FirstlineLastline Space after "\n " NewLine=`printf "\n "` echo -e "Firstline${NewLine}Lastline" Result: Firstline Lastline Question: Why doesn't 1. create the following result: Firstline Lastline I know that this specific issue could have been worked around using other techniques, but I want to focus on why 1. does not work.

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