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• get bash history to vi

  - by nameanyone

  When I try to read bash history into vim, I get nothing. :r !history If I just execute the command, i.e. :!history instead of history I get a snapshot of my terminal as it looked before I started vim. How can I read the output of "history" into vim? Reading the contents of .bash_history won't do as I save history with timestamps: HISTTIMEFORMAT='%Y.%m.%d %R '

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• running a bash script from a make file

  - by Matthew

  I have a makefile from which I want to call another external bash script to do another part of the building. How would I best go about doing this.

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• Inline comments for bash?

  - by Lajos Nagy

  I'd like to be able to comment out a single flag in a one-line command. Bash only seems to have `from # till end-of-line' comments. I'm looking at tricks like: ls -l $([ ] && -F is turned off) -a /etc It's ugly, but better than nothing. Anybody has any better suggestions?

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• Bash script, read values from stdin pipe

  - by gmatt

  I'm trying to get bash to process data from stdin that gets piped it, but no luck, what I mean is none of the following work: echo "hello world" | test=($(< /dev/stdin)); echo test=$test test= echo "hello world" | read test; echo test=$test test= echo "hello world" | test=`cat`; echo test=$test test= where I want the output to be test=hello world. Note I've tried putting "" quotes around "$test" that doesn't work either.

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• bash completion for Subversion

  - by khmarbaise

  I've tried to load bash_completion in my bash (3.2.25), it does not work. No message etc. I've used the following in my .bashrc if [ -f ~/.bash_completion ]; then . ~/.bash_completion fi I also tried to use .bash_profile instead, but with the same result. So the problem is why does it not work? Any idea? Hints?

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• Batch equivilant of Bash backticks

  - by MiffTheFox

  When working with Bash, I can put the output of one command into another command like so: my_command `echo Test` would be the same thing as my_command Test (Obviously, this is just a non-practical example.) I'm just wondering if you can do the same thing in Batch.

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• bash: assign grep regex results to array

  - by Ryan

  Hello everyone, I am trying to assign a regular expression result to an array inside of a bash script but I am unsure whether that's possible, or if I'm doing it entirely wrong. The below is what I want to happen, however I know my syntax is incorrect: indexes[4]=$(echo b5f1e7bfc2439c621353d1ce0629fb8b | grep -o '[a-f0-9]\{8\}') such that: index[1]=b5f1e7bf index[2]=c2439c62 index[3]=1353d1ce index[4]=0629fb8b Any links, or advice, would be wonderful :)

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• Recursive follow files in bash

  - by user328955

  I have files which contain file names pointing to other files. These files contain further file names pointing further files and so on. I need a bash script which follows each files recursively and logs into file every touched file during the run. file1: file2 file3 file2: file4 file3: file5 file4 and file5 are empty. Result: file1 file2 file4 file3 file5

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• BASH Arithmetic Expressions

  - by Arko

  I had used several ways to do some simple integer arithmetic in BASH (3.2). But I can't figure out the best (preferred) way to do it. result=`expr 1 + 2` result=$(( 1 + 2 )) let "result = 1 + 2" What are the fundamental differences between those expressions? Is there other ways to do the same? Is the use of a tool like bc mandatory for floating point arithmetic? result=`echo "7/354" | bc`

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• Loading variables from a text bash.

  - by S1syphus

  Is it possible to load new lines from a text file to variables in bash? Text file looks like? EXAMPLEfoo EXAMPLEbar EXAMPLE1 EXAMPLE2 EXAMPLE3 EXAMPLE4 Variables become $1 = EXAMPLEfoo $2 = EXAMPLEbar ans so on?

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• Get list of Python module variables in Bash

  - by l0b0

  For a Bash completion script I need to get all the variables from an installed Python module that match a pattern. I want to use only Python-aware functionality, to avoid having to parse comments and such.

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• php vs bash for CLI scripting?

  - by fayer

  i have never used PHP with CLI, but i have seen scripts run with php code. i was wondering, why should we use bash, when php is so popular and is able to run in CLI. what are the pros and cons with each one? should i use php for all CLI scripting in the future?

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• How to build a conditional assignment in bash?

  - by Neuquino

  I'm looking a way to build conditional assignments in bash: In Java it looks like this: int variable= (condition) ? 1 : 0; Thanks in advance

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• Extract File Basename Without Path and Extension in Bash

  - by neversaint

  Given file names like these: /the/path/foo.txt bar.txt I hope to get foo bar Why this doesn't work? #!/bin/bash fullfile=$1 fname=$(basename $fullfile) fbname=${filename%.*} echo $fbname What's the right way to do it?

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• Bash: ambiguous redirect

  - by Werner

  Hi, I get in a bash script, in the follwoing line echo $AAAA" "$DDDD" "$MOL_TAG >> ${OUPUT_RESULTS} the error: line 46: ${OUPUT_RESULTS}: ambiguous redirect Why? Thanks

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• Source operator doesn't work in if construction in bash

  - by Igor

  Hello, I'd like to include a config file in my bash script with 2 conditions: 1) the config file name is constructed on-the-fly and stored in variable, and 2) in case if config file doesn't exist, the script should fail: config.cfg: CONFIGURED=yes test.sh: #!/bin/sh $CFG=config.cfg echo Source command doesn't work here: [ -f $CFG ] && ( source $CFG ) || (echo $CFG doesnt exist; exit 127) echo $CONFIGURED echo ... but works here: source $CFG echo $CONFIGURED What's wrong in [...] statement?

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• [bash] Escape a string for sed search pattern

  - by Alexander Gladysh

  In my bash script I have an external (received from user) string, which I should use in sed pattern. REPLACE="<funny characters here>" sed "s/KEYWORD/$REPLACE/g" How can I escape the $REPLACE string so it would be safely accepted by sed as a literal replacement? NOTE: The KEYWORD is a dumb substring with no matches etc. It is not supplied by user.

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• Variable assignment in bash

  - by Werner

  Hi, this is probably a very stupid question; in a bash script, given the output of, for instance; awk '{print $7}' temp it gives 0.54546 I would like to give this to a variable, so I tried: read ENE <<< $(awk '{print $7}' temp) but I get Syntax error: redirection unexpected Could you tell me why, and what is the easiest way to do this assignment? Thanks

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• Command to escape a string in bash

  - by User1

  I need a bash command that will convert a string to something that is escaped. Here's an example: echo "hello\world"|escape|someprog Where the escape command makes "hello\world" into "hello\\world". Then, someprog can use "hello\world" as it expects. Of course, this is a simplified example of what I will really be doing.

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• Check if Screensaver is Active using Mac Bash Script Command

  - by credford

  I've found many useful Bash commands that can execute OS X behaviors from the command line such as: screencapture -x -C $FILENAME Is there such a command that can check if the screen saver is active?

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• Equivalent of `__FILE__`, `__LINE__` in bash

  - by bibop554

  Is there any variable in bash that contains the name of the .sh file executed ? The line number would be great too. I want to use it in error messages such as: echo "ERROR: [$FILE:L$LINE] $somefile not found" Thank you

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• Turn off error messages in a bash script

  - by Werner

  Hi, how can one turn off the error messages of a bash script? I want to turn it off, and handle the expected ones by myself For instance, when it does not find some files, to show my specific error message. Thanks

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• Equivalent of print "-"x20 of perl in Bash or command line

  - by khmarbaise

  In perl you can simply write print "-" x 20 and you get a line with dashes...but i need the same thing in bash/commandline on linux without perl/(g)awk etc. any ideas? The intention is to use it in the -exec of the find command and i want to prevent using simple echo "---------" ...

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• Determine the path of the executing BASH script

  - by Atif Aziz

  In a Windows command script, one can determine the directory path of the currently executing script using %~dp0. For example: @echo Running from %~dp0 What would be the equivalent in a BASH script?

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• symbols in command line argument.. python, bash

  - by Idlecool

  Hi, I am writing a python script on Linux for twitter post using API, Is it possible to pass symbols like "(" ")" etc in clear text without apostrophes.... % ./twitterupdate this is me #works fine % ./twitterupdate this is bad :(( #this leaves a error on bash. Is the only alternative is to enclose the text into -- "" ?? like.. % ./twitterupdate "this is bad :((" #this will reduce the ease of use for the script Is there any workaround?

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