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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…

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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…

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• Bash Script to remove iframe virus

  I want a bash script to read all files recursively in a directory and remove some code (i.e a iframe virus) from it and save back the orignal file.

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• Regexp in bash for number between "quotes"

  - by MArio

  Input: hello world "22" bye world I need a regex that will work in bash that can get me the numbers between the quotes. The regex should match 22. 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…

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• How does one output bold text in BASH?

  - by ratberryjam

  I'm writing a bash script that prints some text to the screen: echo "Some Text" Can I format the text? I would like to make it bold. Thank you.

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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…

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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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• 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…

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• Is there a bash command to do this?

  - by user198729

  I want to know if new files/directories have been created in a specific directory A since a fixed date time. Is there a bash command to do this?

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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 …

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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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• 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`} …

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• Need help understanding a bash command

  - by user198729

  It's actually a combination of php and bash: exec(sprintf("%s > %s 2>&1 & echo $! >> %s", $cmd, $outputfile, $pidfile)); I don't understand what 2>&1 & echo $! is there for?

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• Bash script if statements

  - by Jonhnny Weslley

  In Bash script, what is the difference between the following snippets? 1) Using single brackets: if [ "$1" = VALUE ] ; then # code fi 2) Using double brackets: if [[ "$1" = VALUE ]] ; then # code fi

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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…

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• Including/Importing aliases and functions for both bash and zsh

  - by blueblank

  I have a directory of functions and aliases I'd like to include for both bash and zsh terminal invocations (So I don't need to put every function and alias into every separate script and to facilitate organization/tidying of .rc files) What I've tried so far hasn't worked. Just setting this out for further…

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• add string after each line bash

  - by Jason Volkoz

  How do I add a string after each line in a file using bash? Can it be done using the sed command, if so how?

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• spawn an entirely seperate proccess in linux via bash

  - by meesterfox

  I need to have a script execute (bash or perl or php, any will do) another command and then exit, while the other command still runs and exits on it's own. I could schedule via at command, but was curious if there was a easier way.

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• spawn an entirely separate proccess in linux via bash

  - by meesterfox

  I need to have a script execute (bash or perl or php, any will do) another command and then exit, while the other command still runs and exits on it's own. I could schedule via at command, but was curious if there was a easier way.

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• sum up value from textfile - bash

  - by user3493435

  I am trying to sum up the values in a textfile try.txt firstNumber,1 secondNumber,2 I tried with this script #!/bin/bash while IFS, read -r -a array; do printf "%s %s\n" "${array[0]} ${array[1]}" for n in "${array[1]}"; do ((total += n)) echo "total =" $total done done…

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• Conecting bash script with a txt file

  - by cathy

  I have a txt file with 100+ lines called page1.txt; odd lines are urls and even lines are url names. I have a bash file already created that checks urls for completion. Except right now, the process is really manual because I have to modify the bash every time I need to check a url. So I need to connect…

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• Bash Shell Scripting Errors: ./myDemo: 56: Syntax error: Unterminated quoted string [EDITED]

  - by ???

  Could someone take a look at this code and find out what's wrong with it? #!/bin/sh while : do echo " Select one of the following options:" echo " d or D) Display today's date and time" echo " l or L) List the contents of the present working directory" echo " w or W) See who is logged…

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• Transpose a file in bash

  - by Thrawn

  Hi all, I have a huge tab-separated file formatted like this X column1 column2 column3 row1 0 1 2 row2 3 4 5 row3 6 7 8 row4 9 10 11 I would like to transpose it in an efficient way using only using commands (I could write a ten or so lines Perl script to do that, but it should be slower to…

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• Mixing regular expression and other conditional expression in a bash if statement

  - by Tassos

  I can't get around this for quite sometime now. As I read along manuals and tutorials I'm getting more confused. I want an if statement with the following logic: if [ -n $drupal_version ] && [[ "$drupal_version" =~ DRUPAL-[6-9]-[1-9][1-9] ]]; then but I can't get it to work properly.…

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