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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930 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 ...
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2answers
3k views

/usr/bin/env: zsh -: No such file or directory

I get the error /usr/bin/env: zsh -: No such file or directory ...when I run an executable zsh script that starts with the following shebang line: #!/usr/bin/env zsh - Also, FWIW, replacing - ...
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2answers
95 views

Scripting to domain allocation to server

I have two text files: file #1: domain.txt cocacola.com airtel.com pepsi.com file #2: servers.txt 192.0.53.42 , 4 # 4 domains already allocated on server 192.0.53.42 192.53.1.2 , 1 # 1 ...
2
votes
1answer
462 views

Script for courier maildir folders on CentOS LAMP environment

I'm looking for resources to help me build a script to do monthly maintenance of maildir folders for a typical CentOS LAMP VPS hosting environment. I would like to run a script that runs from a ...
1
vote
2answers
74 views

identify harddrive before mounting

I've recently made 2 script that take care of mounting and dismounting a harddrive in linux. The thing that I could not figure out is the following. I am currently mounting /dev/sdc1 to ...
1
vote
1answer
622 views

How can you run a script triggered by a joystick input?

I'm using a Raspberry Pi running Raspbian to power my arcade cabinet. I want to shut the Pi down using the sudo poweroff command without using the keyboard. I'm thinking the best way would be to ...
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2answers
358 views

tail -f equivalent

I am seeing several seconds delay with the tail command. I found the cause for it has something to do with nfs services. I am using arch linux and yet to find out how to disable all these services I ...
0
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1answer
40 views

Debian - Using TFTP in a bash script

I'm actually using RPiTC (Raspberry Pi Thin Client). I had create a script to see if my Hostname has the same name than a file. And now I want to say "If my Hostname don't have the same name than my ...
0
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1answer
41 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 [ ...
0
votes
2answers
45 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 ...
0
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1answer
70 views

Shell string escape for command arguments [duplicate]

I'm trying to create "/tmp/pwet/foo bar" with this: DIR="/tmp/pwet/foo bar" ARGS="-p ${DIR}" mkdir $ARGS For integration reasons, I have to keep the ARGS building in 2 steps: ARG = some_options + ...
0
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5answers
120 views

Create a list of directories

I have a list of names in a text file (list.txt) I want to create a list of folders for the names included in that file. I wrote the following script, but it doesn't work and I don't know what is ...
0
votes
1answer
101 views

Is it possible triggering a script with a change of amount of files in a directory? [duplicate]

Is it possible to create some kind of directory watcher and trigger a script when the folder is not empty? I have a CentOS machine with jenkins CI on it. i would like to create a job that will move ...
0
votes
2answers
978 views

Change motd value in UNIX Operating System

I need to change the value of MOTD using a script but I do not know how I should start. Am attaching sample MOTD if anyone can help.             ...
0
votes
1answer
239 views

Bash script installing within multiple directories [closed]

I am attempting to write a bash script that will install rbenv from beginning to end. I am on a Mac for interest sake. But there are some things that are not working mainly i am changing the ...
0
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1answer
635 views

Script with root permission [duplicate]

Possible Duplicate: Redirecting stdout to a file you don't have write permission on I am creating a script to change the brightness of my laptop. I discovered that I can do this using ...