A script is a sequence of commands or instructions that are executed by an interpreter program rather than compiled into a standalone executable program.

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How to run a shell command in a server?

I am fairly familiar with computers and web stuff but this is a bit out of my comfort zone. I have a shell script (.sh file) I want to run in a Linux server I have one site hosted (the script is a ...
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1answer
8k views

bash: integer expression expected

I have a file out.csv I have to check if the name inputed by user exists in the file(comma separated) or not. I am taking name using read but while checking for equality I am getting error ...
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168 views

How can I merge multiple lines with spaces (blank line) separating them? [closed]

I'd like to merge the following multiple lines of output so that they form a single line: line 1: ...
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2answers
6k views

How to get volume level from the command line?

I have a text status bar on a tiling window manager and I am using tcl to feed information to it. At the moment I need a command line that output the volume level 0% to 100%. I am using Arch Linux.
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2answers
1k views

Launching an external script with source command

I've been learning shell scripting, by reading good tutorials and reading scripts. I was reading this minecraft init script, and these first lines hit me: if [ -L $0 ] then source `readlink -e ...
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3answers
453 views

how to calculate the average value of the column that have the row ID?

I want to calculate the average value of my data when they have the same ID (in my specific case, the same day but different time in a day). This is meant to calculate the daily average value of my ...
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3answers
251 views

how to run more than one program in a single script?

I have about 6 programs I want to run one after the other. They all are in different directories with their respective data. I would like help with a script that I can use to run each program in a ...
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2answers
168 views

open a file and copy the listed files to another folder

I have a file named file1.txtcontaining file names like below : filea.txt fileb.txt filec.txt I want to copy the files listed in file1.txt to another folder. What is the UNIX command to use? (the ...
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1answer
3k views

Press a html button via shell script?

i am currently trying to write a script to change some parameters on a webpage via a shell script. I can change the values in the textboxes without any problems, but i can't seem to figure out how i ...
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4answers
482 views

Adding values of the column that have the same data ID?

I want to prepare a uniform daily data from a mixed daily and sub-daily data by adding the sub-daily values and producing a uniform daily data. My sample input and desired out put data looks like ...
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2answers
98 views

how to duplicate values of each row under each for n times? [duplicate]

I have daily data which I want to duplicate in to 24 hours data keeping the value the same for the hourly time step. My data looks like: day Value 01/01/2012 2 01/02/2012 3 Then I want the ...
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1k views

How do I reset a USB device using a script?

I have a USB GSM modem that does not always work property (Huawei E367u-2) Sometimes it gets reset (USB device disconnect/reconnect in logs) and when it comes back up, it has different ttyUSB numbers. ...
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7k views

Capture output of a bash command, parse it and store into different bash variables

Explanation: I have a small bash script which simply runs any Linux command (e.g. say ifconfig) The typical output of ifconfig is something like this: eth0 Link encap:Ethernet HWaddr ...
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3answers
188 views

selecting rows that have the same value [closed]

I have a problem in selecting rows that have the same value. My data is too huge to go row by row to do that. I want you guys to let me know scripts that can perform this. My data looks like as ...
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2answers
3k views

how to select, copy columns of different file to form new files

I have four files each contain daily station data. file 1: prec file 2: minT file 3: maxT file 4: wind Here prec, minT, maxT and wind are files that store values of prec, minT, maxT and wind for ...
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Does the shebang determine the shell which runs the script?

This may be a silly question, but I ask it still. If I have declared a shebang #!/bin/bash in the beginning of my_shell_script.sh, so do I always have to invoke this script using bash ...
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1answer
470 views

Similar method to /etc/init.d

I have set my script to run using the /etc/init.d method. All works good. The problem is that my script does packet capturing and when it restarts the machine after say the crond is loaded then it ...
6
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1answer
814 views

Capabilities for a script on Linux

If I want to set a capability (capabilities(7)), such as CAP_NET_BIND_SERVICE, on an executable file and that file is a script, do I have to set the capability (setcap(8)) on the interpreter starting ...
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2answers
665 views

Why the inconsistency with using cat vs. echo piped to this sed command?

Inspired by this question: sed: N command does not read single line I wanted to understand why there appears to be an inconsistency between the following 2 commands: #1. echo This command produces ...
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1answer
2k views

Script Command without Junk Character

I'm Using Unix script command to record everything which is output to the terminal and place it in a log file. but when I see recorded file, it also include Junk Character. So how to record terminal ...
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2answers
525 views

Moving Older Version Files to another folder via a script [closed]

I am trying to find a way of getting my cmd script to look through my folder, find the older versions of the pdf docs in the folder and move them to another folder called older versions. Problem I am ...
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2answers
2k views

Zip folder without including path to folder and require only one argument

I'm trying to make a zip function that'll do all the steps I typically do when zipping a file or folder. Say my current directory is ~, and I want to zip a folder named Folder1, whose file path is ...
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2answers
994 views

screen /bin/bash execute script and then go to interactive shell

I am using .byobu/windows to start up some screen sessions, and I'm trying to start a script that will exit to an interactive shell once it has completed. Is this possible? I've tried: screen -t ...
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2answers
172 views

bash equivalent of zsh's $@[2,$#]

(NB: the motivation for this question is only to improve my bash programming know-how.) I want to know the bash equivalent of zsh expressions such as $@[2,$#], which directly address a range of a ...
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3answers
119 views

Confused on user and su in linux

How could I run a script as a specific user (non-root)? As this? sudo su - john /usr/share/script.pl for user john?
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4answers
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Bash script to rename files from a text file source

I'm fairly new to bash; I can just about perform simple administrative tasks with simple commands 1 at a time. However, I've been tasked with renaming some files in a directory using a text file as ...
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3answers
350 views

Taking Backup of files of particular limit in unix

Here is the scenario, I have 1000 files in a folder each ~3 MB. I want to zip all files into 50MB each zip and remove the original files. NOTE: 50MB may contain 20 files or 10 files but that zip ...
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1answer
2k views

if condition, loop in grep [closed]

Could someone please provide help for me. I tried to start writing a shell script but am getting hung up with this issue. I need to grep commands "adb shell ps" and find in it 3 processes with names: ...
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2answers
18k views

Checking and changing file permission with script

I'm new to bash and I can't get a script working. This is the code that I have: #!/bin/bash file=~/scripts/text.txt if [ -e $file ] then echo "The file exists" elif [ ! -e $file ] then echo "The ...
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5answers
339 views

List a directory but only if it contains sub-directories?

In Unix, is it possible to use one command ONLY to list directories if they contain a sub-directory? For example, I would like to list the directory name if it contains a sub-directory called ...
2
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1answer
639 views

Is it possible to have comments in multiline commands in fish?

In bash it's possible to do my_function() { echo "hello" | #remove 'l' tr -d 'l' } but in fish ( http://fishshell.com ) I wasn't able to do the same: function my_function echo "hello" | ...
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0answers
486 views

gnome-terminal cmd leaving processes open after closing parent window

The following simple command should demonstrate my issue: gnome-terminal --tab -t "Tab 1" -e "/bin/bash" --tab -t "Tab 2" -e "/bin/bash" This should open a new window with two tabs and an active ...
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Is there a way to simulate a “Close” event on various windows using the terminal?

I answered on Ask Ubuntu Quit all instances of gnome-terminal via a command but as you all can read gnome-terminal didn't seems to have a SIGcall I could use to simulate this "Close" event. So this ...
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2answers
1k views

While reading from a file, choose specific fields and compare them with another file in Unix bash?

I have a CSV file that contains the columns a,b,c,d and e and another file that contains column z. While reading line by line from the 1st file I want only fields c and d and at the same time I want ...
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2answers
395 views

How to assign shell command to key?

I want to assign my script to special key on my keyboard. xmodmap recognize this key as XF86AudioMute, but I want to execute my script when it pressed. How to do it? My window manager is Window ...
2
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2answers
1k views

Looping over a folder enter anyways the loop

When looping on a folder through a for f in $path I am experiencing an unexpected behaviour, i.e. the loops is entered anyway even if no file match the wildcard. I am using cygwin and this is my ...
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3answers
385 views

Launching shell script from SSH and disconnect

I have a script which I run from SSH that launches several processes which I would like to keep open when I disconnect from my session. Is that feasible? Launching the script in background is not a ...
4
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1answer
367 views

Ubuntu unattended install : echo keypress to dialog

Ubuntu 12.04 LTS Server 64 My unattended-mode bootstrap.sh script contains: apt-get upgrade -y I know that during execution a primitive UI for GRUB installation will be shown which requires ...
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5answers
2k views

Why is the first line comment of .sh file necessary? [duplicate]

I was told that the first line shebang (#!/bin/bash) is necessary in the shell script file, and the file won't run accurately without this line. But I tested some scripts. They work just fine without ...
2
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2answers
780 views

How to set a variable equal to the output from a command in GRUB2?

I want to customize a little my GRUB 2 bootloader, so I'm asking how can I set a variable equal to the output from a command in GRUB2? I am interested to pass the output of date command to a ...
4
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5answers
6k views

Javascript to HTML converter?

Take for example this snippet of code on a web page. <html><body> <script language="javascript"> document.write("The cat"); document.write(" sat on the mat"); </script> ...
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1answer
353 views

Passing values to a parameter in script

Following is the script to copy all libraries of a certain command to make my chroot environment. For example: ./cplb.sh /bin/ls will copy all the libraries of ls command (i.e., the files listed by ...
5
votes
1answer
4k views

Changing password in multiple boxes using script

I'm working in a environment which has around 400 AIX boxes. I don't have root access and I'm a normal user. The environment has no LDAP kind of centralized mechanism for authentication so the ...
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2answers
53 views

Running script on system start as given user

I have a small script on a dev/staging server that runs services inside tmux. The script just creates a few sessions with a few windows each in which various services are running. How can I make ...
4
votes
1answer
482 views

How Can I Automate the Change between a Python Script and a Nohup Python Script?

I have a Raspberry Pi connected to a digital temperature probe, which measures my fermenting beer. A python script reads the temperature every second and prints it to the console, and stores it in a ...
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1answer
475 views

Missing “Run in terminal” in KDE

I switched to KDE from Gnome after seven years using the latter. I have everything configured already but I'm missing one option: the run in terminal prompt, when executing a script double clicking. ...
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1answer
63 views

Is there an easy way to print the GTK and QT versions installed on a system?

Is there an easy way to print the GTK and QT versions installed on a system? I am wanting to make a script that will print the version numbers of various developer tools and libraries.
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1answer
160 views

how to list all the internet's IP ranges? [closed]

I was wondering if I list all the IP ranges directly available on the internet. perhaps also group them by country and ISP? I know that a lot of people do research nowadays on datamining and ...
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1answer
207 views

Mac equivalent application “shortcat”

There is a mac application called Shortcat and it make me envious. For those of you averse to clicking links here is a summary: Keep your hands on the keyboard and boost your productivity! ...
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3answers
599 views

Renaming all files in a directory while keeping the same initial part of the name [duplicate]

I have a directory full of files. I want to rename all the files that match *.py to -backup.py. How do I do that. I know I can use for i in *.py, but from there I'm not sure how to keep the ...