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

learn more… | top users | synonyms (2)

1
vote
3answers
163 views

Can I make [ $(($1 % $check)) -ne 0 ]; be more performant and not be killed?

If have the following code which works for up to 13 (line 2) in a few seconds but when I try and do upper teens and 20 it gets killed after a couple of minutes. divisible_by () { for ((check=2; ...
3
votes
2answers
150 views

How do I drop to a shell after exiting a command I started by scripting tmux?

I'm following this tutorial for scripting the creation of tmux windows. tmux new-window t $SESSION:0 -k -n MAIN 'cd ~/main/ && perl -Ilib myapp' sometimes I kill myapp after I've started ...
2
votes
0answers
164 views

Bash Executing Script from within Script Causes Echo and Read Issues [closed]

I appear to be having unexplainable issues with scripts run from within a subscript. I've been unable to acquire a solution so I will give you what I can to help me solve it. Problem: when a script ...
0
votes
1answer
624 views

How i make this script execute every minute without cron? [duplicate]

I have this: #!/bin/bash wlan=`/sbin/ifconfig wlan0 | grep inet\ addr | wc -l` if [ $wlan -eq 0 ]; then echo wlan0 not connected, connecting... echo sudo ifup wlan0 logger wlan0 reconnected. echo ...
0
votes
1answer
51 views

Disable log of specified crontab item

How can i disable logging for specified item/line in crontab? (i´m on debian/raspbian) I have a script that checks if wlan0 is up every minute, but i don't like that cron logs every minute on syslog ...
0
votes
1answer
233 views

bash shell - how to do nested loop without “syntax error: operand expected” [duplicate]

I am trying for i in {4..100} do is_prime=true a=$(($i-1)) for divider in {2..$a} do b=$(($i % $divider)) # <-- line 9 [ $b -eq 0 ] && echo 'y' #is_prime=false done [ ...
1
vote
3answers
648 views

How to send input in a new terminal using Shell Script

I found out how to automatically send input to a C program using Shell Script. For example, if I compile this C program: //test.c int main() } int x; printf("Please enter an integer:"); ...
0
votes
1answer
151 views

file deletion using forfiles

Trying to delete files in directories named "archive". I have not been able to figure out how to do this without specifcally entering every directory. There are other directories under the serial ...
5
votes
1answer
427 views

echo colored text which changes colors dynamically

Is there any way that i can print a colored text on console which keeps on changing its colors dynamically(with or without a specified time interval) just like some greeting cards in which the ...
1
vote
1answer
83 views

file name as argument and sort in descending way in perl?

I have this perl script #!/usr/bin/perl use strict; open my $df, '<', 'file.txt' or die "open: $!\n"; my %h; while (<$df>) { $h{$_}++ for split /\s+/; END{ for (keys %h){ ...
1
vote
2answers
400 views

Checking URLs for HTTP code 200

I have a text file containing a list of URLs like this: http://somesite.com/some-article/ https://anothersite.fr/somepage.php?page=something What I'd like to do is check which URLs return HTTP code ...
4
votes
5answers
447 views

how to split file and lines

I have a text file like : 1_01 { ; quite good spirals reset=2000 type=mandel passes=1 corners=-0.6014129278/-0.5990935452/0.427747516/0.429487053 params=0/0 float=y ...
1
vote
0answers
43 views

OCR for getting text from an image. Error management

I want to use an OCR program to obtain some text in an image. The text is not black on white so I don't know if it will be possible. wget -q -O image ...
2
votes
3answers
114 views

Pipe files downloaded with wget into a function

I'm downloading a bunch of images with wget and I want to rm the files if they are empty with a function to which I can pass the file. My question is how do I pipe the images to a function like this: ...
3
votes
1answer
4k views

Create sub-directories and organize files by date

I have some directories of files copied from my security camera that I would like to organize into sub-directories by file date. So for example; -rwxrwxrwx 0 root root 4935241 Jul 19 2012 ...
0
votes
2answers
56 views

Copying two words from a string into two variables

I want to get the variables $color and $number from a string that in general is like this: "something, numColor (number)". The color might be W, U, B, R, G. If there is no color the variable color ...
2
votes
1answer
196 views

Problematic bc calculation in shell script

On Ubuntu 14.04.1 64-bit LTS I am writing a shell script and if I define the start of the sequence used in the for loop with a variable instead of a constant I get really weird behavior and there are ...
11
votes
3answers
768 views

How do I do an N-way diff?

How do I diff the output of multiple commands? vimdiff can support up to four files, but diff itself seems to support exactly two files. Is it directly possible with some variant of diff, or do I ...
1
vote
2answers
2k views

Read Command : How to verify user has typed something

I am a beginner in Bash so please bear with me. I'm trying to create an if else statement to verify that the user has entered something. If they have it should run through the commands, and if not i ...
2
votes
1answer
201 views

let script find path of itself

I want to have a bash-script discover its own path. The background is that I have a script called process_scanned_text.sh, which itself uses the script curves. I put curves in the same directory as ...
0
votes
1answer
274 views

How to change date format and position in find output

Sorry if this a basic question. Say i have the following command. It's set to display a list of the last 20 files modified on my drive with the paths included. find -type f -printf '%TY-%Tm-%Td %TT ...
-2
votes
3answers
232 views

How to list filenames within a folder based on a pattern supplied?

I'm trying to find a command that will list all files in a folder containing a keyword that is inputted. I've tried grep -l but it will not list anything
5
votes
2answers
4k views

Using Diff on a specific column in a file

Will it be possible to use diff on a specific columns in a file? file1 Something 123 item1 Something 456 item2 Something 768 item3 Something 353 item4 file2 Another 123 stuff1 Another 193 ...
3
votes
1answer
140 views

Retrieve X11 window ID of a just-launched GUI-program

I want to retrieve the X id of GUI programs I launch in background, in order to work on their windows properties. I've been so far using this workaround: myprogram & sleep 1 winID=$(wmctrl -l | ...
0
votes
1answer
273 views

Create A Script That Responds To A Password Prompt

I'm writing a shell script that will respond to a prompt. For example, when I execute a file, the executed file will then prompt the user with this: Please enter the password: Then I want the script ...
-2
votes
2answers
48 views

how to take the file names from folder

i want to write a program for the below logic: Take the names of files in a folder For each file: print file name move the file to another new folder (with the name in dd_mm_yy format)
13
votes
4answers
569 views

A shell-like environment for binary processing

This question came to me a couple of times before, now in response to the question Loop through binary data chunks from stdin in Bash Answers given in ...
0
votes
1answer
269 views

Interactive shell in background inside another shell script

I have some problems when trying to run an interactive sh session inside a shell script. The inner sh process uses all the CPU and never terminates. To reproduce the issue simply create a file named ...
-2
votes
1answer
57 views

Output a colon delimited file to another file [closed]

I have the following example file: root:server1:2014-12-12:x:Open:adm bin daemon lp mail other root sys users sectmp:server1:2014-12-12:x:Open:users smbnull:server1:2014-12-12:x:Locked:ids ...
1
vote
1answer
83 views

Shutter Script(s)

When i play some games with wine , i must not change the window , because of that , the game crash or that window are fill of black. im using xfce4 desktop , when i press "PrintScreen" key from ...
10
votes
3answers
879 views

How do you continue a sentence with a command inside

For example, I have been trying to say "There are 10 people online at the moment" in my script file. I can never seem to get the command working without the "people online at the moment" part on the ...
0
votes
2answers
189 views

ifconfig -a get needed data grepping

If I issue following command to obtain network interface data: [root@pi lib]# ifconfig -a eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 192.168.0.154 netmask ...
0
votes
2answers
1k views

Run two scripts at the same time

I want to run two scripts at the same time. How exactly do I do this? If I have a variable called foo in script1 and change its value to 5, and if I'm using a variable with the same name in script2 ...
0
votes
2answers
1k views

Check if a file is a text file in bash

I am trying to make a check to see if the file being attached to the email is a text file, and if it is not it returns an error. However during testing, I provide a valid text.txt and it returns the ...
1
vote
0answers
95 views

Logrotate or scripting to manipulate log file

I want to make sure that a certain log file gets empty when it reaches a specific size. I first used logrotate since the man page says: It will not modify a log multiple times in one day unless ...
1
vote
5answers
450 views

How to get the unique count of a particular part of a string

I have a set of data in a file. psf7433-nlhrms unit7433-nobody unit7333-opera bpx7333-operations app7333-osm unit7330-partners psf7331-pdesmond unit7333-projm mnp7330-redirect unit7333-retailbanking ...
2
votes
3answers
260 views

How can I print only variables defined inside my shell script?

Lets supose some bash shell script like: #!/bin/bash a=3 b=7 set -o posix set In this case, the execution of the set variable or some other of the commands to print environment variables ...
0
votes
1answer
132 views

Script thinks input is a command?

I'm just getting started on a script that does basic shell commands, but the second function, which is supposed to take a valid year and month and plug them into cal, is returning with this error: ...
2
votes
4answers
4k views

Shell script to validate mount point status in the linux server

I'm in need of a script which should work as below. A script where it would validate if that specific mountpoint is currently mounted on the server. It would search for mountpoint name in /etc/fstab ...
1
vote
2answers
392 views

untar shell script

i have a directory in which there are multiple tar files like tweets10_1.tar tweets10_2.tar tweets10_8.tar now i want to untar these files and keep them in a directory structure like 10_1 10_2 ...
2
votes
2answers
488 views

How can I automatically silence my computer at night?

I would like to set my Ubuntu computer such that I can't hear any audio between 9:59pm and 8:00am. How can I do that?
0
votes
2answers
51 views

find parent string based on regex

No sure if I can do this easily but: I have a file like VDS|name=vds01|another_parameter vol=disk01|parameter|dev=/dev/dev/my_dev1|parameter_A=some_value1 ...
2
votes
1answer
62 views

Can I control a graphical program from the command line?

How can I enter text in the text fields of the window shown by a program in an automated manner?
2
votes
2answers
1k views

Quickly check whether many network hosts are up-and-running

Objective: check if a host is up-and-running on the network, with a method that can be efficiently parallelized over many hosts. Emphasis on a QUICK turnaround of the check. Reason to emphasise ...
0
votes
1answer
94 views

A shell script that give the CPU information [closed]

Can someone help me to write a shell script that'll give me the following information: The state of the process; The time it passed the process in the CPU; The total memory used (in KB); The number ...
0
votes
1answer
147 views

Sendmail shell script not working

Can anyone help me please. I'm struggling with a issue since hours and can't seem to fix it. When I execute this script via shell it works and I also get the right email output sent to me, but when ...
-5
votes
3answers
2k views

How do you print the current month, day and year using awk and date?

I can't seem to grab the month, day and year using awk '{print $2, $3, $6}' date Does anyone know how to?
0
votes
1answer
200 views

Shell script runs differently when schedulled with cron

I have a strange problem with my backup script. To begin with, this is the backup script: ########################################################### # CODE BEGINS HERE ...
4
votes
1answer
444 views

Export passwords from the `pass` password manager

I've been using the pass password manager for a year or so now, and it's awesome, but sometimes I like to test other password managers and then I need my passwords back. So far I've just been adding ...
1
vote
3answers
120 views

How I can determine the latest version in URL?

I'm trying to put a "function" inside of a script to install the latest version of "TeamSpeak3" Client and make all configurations. My problem is I don't know how to make a function to test the ...