Bash is the shell used in Ubuntu's command-line interface.

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compile a fortran code in an other server

I am a beginner in Linux. I have a Fortran code that I can run it in my own server,but when the same package is copied to an other server,it is not work. in my server i type this in terminal program: ...
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1answer
52 views

Can somone help me make this script more readable?

SRC="/src" export DEST="/dest" find "${SRC}" -iname '*' -type f -exec bash -c 'EXT="${0##*.}"; EXT=${EXT,,}; if [[ "${EXT}" == *"/"* ]]; then EXT="no_extension"; fi; mkdir -p "${DEST}/${EXT}"; rsync ...
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1answer
71 views

Facing error in recursive function for deriving factorial of a number

I have written the following code to derive factorial of a given number. Being newbie to Shellscript, I used normal C code logic of recursive function. #!/bin/bash #This script will do factorial of ...
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1answer
89 views

How do you create a Bash Script for replacing text in a document, utilizing regular expressions? [closed]

Identical to this question: Find and replace text within a file using commands However I want an answer that utilizes regular expressions specifically. So in short: Using commandline; what command ...
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4answers
1k views

tr: convert apostrophe to ASCII

I'm trying to convert a Right Single Quotation Mark to an Apostrophe using tr. tr "`echo -e '\xE2\x80\x99'`" "`echo -e '\x27'`" < a > b given a UTF-8 encoded file called a which contains this ...
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5answers
2k views

Is there any default function/utility to prompt the user for yes/no in a Bash script?

Sometimes I need to ask the user for yes/no to confirm something. Usually I use something like this: # Yes/no dialog. The first argument is the message that the user will see. # If the user enters ...
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1answer
74 views

Run interpreted commands within sudo

The question is how to run generic commands which may contain ; && | < > << >> $ and so on within sudo. Possible solutions could be: To use interpreters within sudo sudo ...
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5answers
9k views

Add column from one .csv to another .csv file

file1.csv A,,C,D A,,C,D A,,C,D A,,C,D file2.csv A,B A,B A,B A,B desired Output.csv A,B,C,D A,B,C,D A,B,C,D A,B,C,D I've tried using "join" and "paste" to no avail. Is there a bash command to ...
2
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1answer
217 views

Find not removing files in folders through bash script

I'm very new in bash scripting and I'm really stuck on the find method from Ubuntu. I want to search in the folder /opt/ for all folders to see if they are older than a specific date. If they are ...
4
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2answers
401 views

Emulate mouse click when hitting a key

I am trying to emulate left-mouse-down when Home key is down and left-mouse-up when Home key is released. The reason behind that is my touchpad's buttons are terrible and I like to use the ...
4
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2answers
436 views

Shell gives no prompt if auto completion is enabled (blinking cursor instead)

I tryed to enable shell autocompletion uncommenting the following lines in my .bashrc: # enable programmable completion features (you don't need to enable # this, if it's already enabled in ...
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0answers
53 views

How to terminate server process?

I just created automation sending an email using a shell script, but it always running and send me an email every sec to my email. I'm using PID and that process name to terminate it, I'm writing ...
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1answer
2k views

How to auto load source file on bash startup?

I recently installed Ruby Version Manager (RVM) to make use of the command called compass. Initially it was working find on installation, but now I get a missing error: The program 'compass' can be ...
3
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4answers
884 views

Add to path only sh file not a dir

I have a bin folder with a bunch of sh files. For example "server-run.sh", "server-stop.sh", "server-do-something.sh". And I want to run file "server-stop.sh" from anywhere. I could add this bin ...
1
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1answer
49 views

How to make a application/script available from Bash? [duplicate]

If I want to launch a script (let's say in the home directory I have a file called hi.py) I need to specify the full path: python /home/user/hi.py. But when I want to use mkdir I can simply say: mkdir ...
2
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1answer
428 views

Shell script to move all images excluding ones with size in name using find?

I have a server backup of a WordPress site that has about 1000 images in the uploads directory. When an image was uploaded through WordPress it would create multiple sizes of the image such as: ...
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2answers
1k views

Redirecting output to a variable?

I'm interesting in directing the output from two commands to a variable. I don't want the output to be displayed on the screen, but instead assigned to a variable within my script so that I can use ...
0
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1answer
150 views

/etc/network/if-up.d script with password prompt

I want a script that logs me in when a specific interface uplink was established (university LAN). The thing is I don't want to hardcode my password into the script. Is there any way to prompt for a ...
11
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4answers
13k views

Problem with Bash script: 'declare: not found'

I had a script which was running fine but when I ran it today, it says declare: not found. I am using bash shell and path at the starting of the script is correct. Two flagged lines in my script are ...
1
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1answer
198 views

show limited git diff status in ls, only in git directories

This might be an odd problem, but I would like to override the behavior of ls when in a git directory. I want to extract some diff statistics from the last commit, and append it to the bottom of the ...
0
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2answers
123 views

Set custom added PATH vars to work in each Terminal session [duplicate]

I ran these 2 commands simply in the terminal: export PATH="$PATH:/home/milkncookiez/Developer/android-studio/bin" export PATH="$PATH:/home/milkncookiez/Developer/PhpStorm/bin" in the 2 bin folders ...
4
votes
2answers
149 views

Change current working directory only by typing the name of the new one

Something similar to this Q&A, I know that cd will change current working directory in terminal to a new directory like this: cd /path/to/new_directory But I wonder how can I change current ...
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2answers
129 views

Continous Loops in Bash

I'm interested in writing a program that will get the size of the mail spool file for the user. (The spool files found in /var/spool/mail/$USER on Linux). To do this, I would like to create a ...
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3answers
456 views

copy n number of files from one folder to another folder

I have a folder of n number of files. I need to move n/2(or)n/3 files from that folder to any other folder. How to set the value of n so that it will move exact those number of files?
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1answer
54 views

Bash: what is the meaning of ${parameter##word}

I'm working on bash code and I found a function CheckOtherFiles that I guess is used to check if a file ($1) is more recent from file $WS_ROOT/$NomeVista/COMP/COMP_COMPILE. CheckOtherFiles is called ...
0
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1answer
75 views

Mercurial no color in commands after doing su

First noticed in 12.04 still persists in 14.04 This happens when to change to a system user (www-data, postgres, etc) and not for a user which has a desktop profile setup. What I have tried: Copy ...
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2answers
112 views

Media Scanner Script

I am a beginner with Bash scripting. I have recently been working on a script to harden Ubuntu computers for a school project. Everything is going well, except that the students are not allowed to ...
32
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1answer
2k views

How can I make cowsay say something every time I close the terminal?

I want cowsay to print something like "have a nice day" when I close the terminal. I know I have to have some kind of script, but I'm not even sure how to write a script or how to use it once it's ...
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2answers
2k views

How to make svn look for if there is an update once a minute and if there is call some script?

I wonder if it is possible to create such .sh script that a normal user would be capable to start with something like nohup ./superScript.sh >& /dev/null & and which would once a minute ...
4
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3answers
4k views

Cannot use “./” to execute a shell script

Maybe someone here would be able to help me out. Have installed Ubuntu 12.04 LTS (kubuntu) on two machines. The .bashrc and .bash_profile files are identical as the file structures on each machine is ...
2
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2answers
460 views

Run a standard command in bash script

I am writing a bash script to automate several actions: #!/bin/bash echo "Hello, World" NAME="${1}" PATH="${2}" echo $NAME echo $PATH eval "ls" I am going to call ls, ffmpeg and a lot of ...
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3answers
562 views

script skipping user input in nested case statement

I am trying to create a nested case statement in which user input is expected (Y/N). However, the system never waits for the input and always goes to the third option, "Please answer yes or no". Can ...
0
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1answer
213 views

Trying to add timestamp to image but keep getting error unknown image property “%[exif:DateTimeOriginal]”

I want to put timestamps on all images in a directory based on the date created/modified. I've seen a bunch of methods like this and this, but they all use the code %[exif:DateTimeOriginal] which ...
2
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3answers
1k views

stop program from terminal if running for more than x seconds

so by typing /.blabla I launch the program blabla. Is there a way, from the terminal, to stop (i.e. equivalent of ctrl+c) blabla has been running for more than x secs? (I'm trying to test a ...
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2answers
2k views

Can I create a separate bash history file for each terminal profile?

I use a bash script to start gnome-terminal with multiple tabs, each tab using a different profile, working directory, and in some cases executing a command within the tab. In this situation, I'd ...
3
votes
1answer
416 views

How do I delete all pop/rap music?

I have all the music stored in ~/Music and I want to delete all pop music (or it could be a different genre). I was thinking to look the song metadata to check and see if a song is pop, and then ...
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1answer
1k views

Add custom script to PATH

I know there are quite some answers about that, but still could not make my way around it. I read all this and tried to follow the example under System-wide environment variables (for my case of ...
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2answers
2k views

sed “Permission denied” and “No such file or directory” errors while building Clockwordmod

Whenever I execute the command build/tools/device/mkvendor.sh samsung_aegis2vzw /your/path/to/the/boot.img I get this as the output build/tools/device/mkvendor.sh: line 83: /sedcommand: ...
37
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6answers
42k views

/etc/profile not being sourced

For 11.04, I did a fresh install of my system. Part of that install was to install rvm, which sticks a rvm.sh in /etc/profile.d/. This doesn't work as /etc/profile (which loads each +r in ...
2
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1answer
261 views

Rename all files in subdirecories

I am having a problem writing a script for mass renaming of files in subdirectories. I have a folder with multiple subfolders, and those subfolders have multiple files that I need to rename. This is ...
7
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3answers
2k views

What is the point of the bash Null-operator “:”, colon?

What is the point of the "null" operator in a BASH script? I understand that it is used as a placeholder following an if command when you have nothing to say, but need a command to allow the program ...
2
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1answer
235 views

Where does /etc/inputrc come from?

I'm just being curious about how or from what package the /etc/inputrc file is generated in an Ubuntu system. I've tried: $ apt-file search /etc/inputrc But it outputs nothing. No package assigned? ...
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2answers
801 views

How to run a shell script with a file argument located in the same directory at the script? [duplicate]

I would like to run a command with an argument placed in the same directory as the shell script, from a shell script. example: my_installer.sh: #!/bin/sh sudo dpkg -i --someflags=abcd blah.deb ...
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0answers
84 views

$DISPLAY env var gets cleared at random times

Stock Ubuntu 14.04 Trusty. I seem to regularly experience the $DISPLAY environment variable getting cleared for some reason I don't understand. Basically everything will work just fine until it's ...
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2answers
279 views

How to enable tab autocomplete for scripts located in ~/bin?

If I put an executable in ~/bin I can just type the first few letters of the filename and then hit tab to let the shell finish the rest of the name. While this works with executable programs, it ...
0
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1answer
620 views

Terminal error (some typo somewhere?) with .bashrc disables all aliases etc

I can't use any of my aliases or custom defined variables in bash. The error when I open the terminal is immediately: : command not found bash: /home/khaverim7/.bashrc: line 6: syntax error near ...
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1answer
123 views

Smartctl script to write zeros

So i have an old hdd that was badsectors and i wrong the following script to write zeros in badsectors that smartctl finds. The question is will this help the read/write errors or it is futile? the ...
1
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1answer
54 views

Recover accidentally deleted function that is loaded in bash

I was editing my .bashrc file (actually a file sourced in there) and added a bunch of functions. I track my home directory in git, but I accidentally did a hard reset before even staging the changes. ...
0
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1answer
519 views

Sharing variables between shell scripts [duplicate]

I have a shell script (let's call it parent.sh) which calls another shell script (child.sh), passing it an argument. The child script does some work and sets a value in a variable called create_sql. ...
0
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1answer
46 views

What damage will an accidental move of /bin do?

Whilst testing a little bash script I've been writing, a little finger trouble led to a directory name variable not being passed in, resulting in a move command being applied to /* . /boot was moved ...