Questions about shell scripts, executable files that are interpreted by a shell (bash, zsh, etc.).

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-3
votes
0answers
19 views

Find the number of jobs present in each box. Find the number of child box in each parent box [on hold]

BOX_A--------------------SUCCESS JOB_AA--------------------SUCCESS JOB_AB--------------------SUCCESS JOB_AC--------------------FAILURE BOX_B--------------------FAILURE ...
-2
votes
0answers
9 views

script to check availability of mail server domain using wget command in solaris 10 [on hold]

#!/bin/sh /usr/sfw/bin/wget --secure-protocol=SSLv3 mail.google.com 2>&1 | awk '/^ /' if [ $? -ne 0 ] then echo "Server is UP" else echo "Error: URL "mail.google.com" is not ...
1
vote
1answer
41 views

Display a line in a text file if variable matches a part in the line?

I'm making a stock checker. I have a file with all of the NYSE exchanges and their descriptions. The descriptions start on the first tab enter of the file. The file formatting looks like this: A ...
-4
votes
0answers
13 views

Shell Script to Generate Automatic ticket/Email [on hold]

I have a requirement to generate an auto ticket/email when it's time for a scheduled task to be done and it should repeat again when it's time for performing the task. Could you please help me with ...
1
vote
1answer
36 views

Find last line of a file for matching string?

I want a loop that runs infinitely over a file but always checks the last line to see if it contains the matching string if it does then echo that line and keep the loop running. What I have right now ...
-1
votes
1answer
21 views

Starting Debian mono application (that has a GUI) AFTER boot is done [duplicate]

I've been trying to figure out how to start an application after Debian (Wheezy) is done booting up and on an LXDE desktop session. It is a mono C# application. The script I have is simply mono ...
1
vote
2answers
62 views

Difference of using () and $() to execute a series of commands

I am currently trying to make a script that creates bytes that will be piped as input to netcat. Here is the idea of the script: (perl -e "print \"$BYTES\x00\"; cat file; perl -e "print \"More ...
0
votes
1answer
23 views

Want to use find with rsync in script

I'm trying to make a script that will run in cron, that will search a path for specific file name. In the path there might be more folders with that same file name. If found and they are newer than 2 ...
-2
votes
2answers
43 views

How to make a password box in linux? [on hold]

I have a script but can't find mistake: #!/bin/bash data=$(tempfile 2>/dev/null) trap "rm -f $data" 0 1 2 5 15 dialog --title "Password" \ --clear \ --passwordbox "Enter your password" 10 30 ...
1
vote
2answers
27 views

How do I generate diffs for a series of files?

I have a series of a few thousand files, all with filenames in order, so let's say file1.x, file2.x, file3.x, etc. All these files are in the same directory. I know how to generate a diff from ...
1
vote
3answers
46 views

Killing the previous instances of a script before running the same unix script

I want to kill the background process of the same shell script that i am going to run again. That means before executing the shell script i want to delete the background process running for the same. ...
3
votes
3answers
90 views

How to kill this process in bash

I am trying to interface my homemade Raspberry Pi-powered arcade machine with a coin acceptor, and for that I: use a shell script (named gameplay) which starts the game emulator (MAME) when a coin ...
1
vote
2answers
23 views

bash command/script to reset default route

I manage several OpenWrt (embedded linux) routers for which I've written bash scripts to run an Openconnect VPN client. The client uses "vpnc-script" to set up routing, which replaces the initial ...
2
votes
1answer
40 views

Stable timing for shell scripts?

The run times of scripts vary quite much. I would like to find similar time -function as Matlab's timeit, described here. For instance, I am evaluating these commands here about counting quickly ...
1
vote
1answer
17 views

Conditional file and directory installation in Debian Packages

Is it possible to create a binary Debian package with conditional files and directories installation (e.g. installation of an init script in /etc/init.d/ after being confirmed by user)?
0
votes
1answer
20 views

How to make sure the same string doesn't appear next to itself in an array?

I'm making a Rubik's Cube scramble generator, and the turns can't be side by side or else it's useless. I'm trying to stop it from doing the following: Displaying the same string twice, i.e R2 R2 ...
3
votes
2answers
124 views

To count number of matches in a mega string quickly

I have big text-data without spaces and without other rows in one line. In reality, the streams are 0.2 Gb/s, similar situation here, but in this task, counting occurrences which is more challenging ...
1
vote
0answers
33 views

This code isn't working. (Trying to declare array values in a for loop and do math functions on them)

I was again bored and looked up a list of programs to make in bash, and I'm trying to make a CC (credit card) validator. I had to split the characters into an array to do the validation, and I think I ...
1
vote
0answers
21 views

Exceeding paste's length limits in resulting line? [on hold]

I'm in a situation where I am extracting files using Informatica.My problem is that in extreme cases I'm exceeding the maximum length for a resulting line for the header line. I'm on Oracle. What I ...
5
votes
1answer
56 views

Script started as `source` or `executable`?

Can we determine inside the very script whether it started as source (.) or executable (shebang or something alike)?
-1
votes
1answer
54 views

Pass string value to date in Unix

mm="27 Jun 2011" dd=$(date -d'27 Jun 2011' +%Y%m%d) echo $dd I want to use value of mm in second line. When i tried like below dd=$(date -d'$mm' +%Y%m%d) It is giving error.
-1
votes
2answers
41 views

shell script not running using crontab

This is my script mboxutil -l > n.txt sed 's/^.*user//' n.txt > n1.txt cat n1.txt | sed 's/^.//' > n2.txt sed 's/\/.*//' n2.txt > dss_list.txt rm -f n.txt rm -f n1.txt rm -f n2.txt sed ...
0
votes
1answer
46 views

How to extract particular fields from lines using shell commands?

File1: 27/07/2014 10.10.03 Breaker1 was closed by Mr. A.Basu Spectrum ui6dms 29/07/2014 04.50.53 Breaker1 was opened by Mr. D.Gupta Spectrum ui6dms and one note added 30/08/2014 03.20.01 EarthSwitch ...
0
votes
2answers
66 views

What is wrong with the code? [closed]

#!/bin/bash for ((i=1 ;i<=3;i++)) do echo "Enter gallon used(gal):" read gal echo "Enter Miles Obtained(mil):" read mil mileage=`echo $mil / $gal |bc` echo "scale=4; $mileage " | bc c=`echo $c + ...
0
votes
3answers
50 views

Bash: increment a variable in a while loop?

Bash newbie here! I have a bash script that for each file in a set, greps each line in the file for a string. Then it splits the line on commas, converts the 7th element to a float, and increments a ...
6
votes
3answers
270 views

Should I use a slash at the end of path variables in shell script or not? [closed]

Today when writing my shell script. A question suddenly comes to my mind. Since cd /target_dir and cd /target_dir/ both works. Should I add a slash at the end of my path variables in a shell script? ...
-3
votes
1answer
43 views

sed/awk - replace first occurance of a string with array of strings [closed]

I want to find the first occurrence of a word and replace it by 3 strings using sed/awk. for example , I have the below entry in my /etc/hosts file 10.4.16.11 dispatch1 10.4.16.12 dispatch2 ...
2
votes
3answers
204 views

Am I using a while loop wrong?

I found a list of projects to do, and one of them was something that generates amounts of change. I made this code: getamt() { echo "Enter amount of money." read amount echo "OK." } change() { ...
0
votes
2answers
44 views

validate record count in header

I am trying to write a script that should verify total detail records equal to the Record_count in header record, If not throw an error sample data 0001 HD SAP _AP Distribution 20150615 131723 ...
0
votes
1answer
18 views

Substituting the value with spaces for a variable in bash script - the correct way

I have a compilation script that can compile the program with and without the debug symbols. I want to ask via bash prompt ( read ) the user to choose whether he wants a debug version or not with ...
0
votes
1answer
29 views

Export mysql to remote server using one SSH session

I've come across a situation where I had to create a utilitary shell script that would be executed in many servers from different regions. The objective is to dump the local mysql database, copy it to ...
-2
votes
1answer
39 views

Comma and newline replaced with comma [duplicate]

How can I find the solution to replace ":" and newline with comma, and to remove "./" below is the sample format. ls -lRm ./www.toncemoy.com: www_ttoncemly_com, www_ttoncely_com, www_toncethly_com, ...
0
votes
0answers
52 views

comma and newline to be replaced with comma [closed]

Can anyone help me finding the solution to replace comma and newline with comma, below is the sample format. www_sngforadultadhd_com, www_scegforadultadhd_com, www_scegforadultadhd_com, ...
4
votes
4answers
104 views

How to Check the existence of multiple files in a directory and zip the same

I am facing an issue while checking the existence of files ending with the same string/pattern. The file names might be as follows abs_123.unl xyz_123.unl Currently my code is as below and working ...
1
vote
1answer
45 views

Syntax error at a semicolon in a shell script

The one liner command will be longer but this is the part that is throwing the error. for user in natural1 ; do cat <<EOT >> /home/$user/public_html/.htaccess <FilesMatch ...
1
vote
1answer
28 views

Silent installation of shell script using bash file [closed]

I have a setup file for Linux which is in shell script format. I'm trying to perform a silent installation by writing a bash script. When I directly access the script I'm unable to suppress the setup ...
3
votes
1answer
173 views

Approximating a floating point number with correct rounding off

How can I approximate a floating point number using shell-script (say, up to 4 digits after the decimal point)? I have two examples: A=1.2345678 and B=1.2345678E-05. So I would like to get ...
-3
votes
0answers
55 views

Bash Shell - Grep a line from a file - append from an entered variable and query that line?

I would like to grep a line from a txt file use that line and append the variable used "entered from the user. Get the output of the grep add variable with a space and then query that line. Any ...
1
vote
6answers
171 views

Hiding Password in Shell Scripts

How can I hide a password in shell scripts? There are a number of scripts that are accessing database. If we open the script others also aware the username and password. So if anyone knows how to hide ...
0
votes
3answers
57 views

Creating a script that runs a simple command for all files in a directory

I need to use the text-based browser Lynx to dump 1000s of html files into text files, with the same filename. For any given filename.html the command is lynx filename.html --force-html --dump > ...
0
votes
1answer
44 views

Practical usage of “shift” shell builtin command?

I checked the /usr/bin/ssh-copy-id(part of openssh-client package at least under Debian) shell-script and it contains following if-statement: if [ "-i" = "$1" ]; then shift # check if we have 2 ...
0
votes
2answers
31 views

generate alphanumeric string from pattern

I want to generate host names for example from my patter like this: inc-[tnc][app|web][1-10] where it should output like below: inc-tapp1 inc-tapp2 . . inc-tapp10 inc-napp1 . . inc-capp10 inc-tweb1 . ...
1
vote
1answer
51 views

Can someone explain this tail + line to me?

I'm looking through some of the scripts that are on the servers and came across an 80MB shell script. Naturally curious I decided to look in there and came across this line: tail +4802 $0 | zcat - | ...
-1
votes
2answers
35 views

Enter a variable into a command in bash

My question should be simple for you guys. I am writing a simple script that runs a command but the file it would need is always different. Is there a way for it to ask: "Where is the file?" And ...
1
vote
2answers
53 views

How do i search for certain sections of a file and then extract only relevant information within that section?

So I have a text file that is a server report and has about 1000 lines of information in it. I'm trying to write a script that can search the report for only certain pieces of information I'm looking ...
0
votes
1answer
33 views

Is it bad practice to put sections of main code in functions? [closed]

I didn't like the way the code that I had looked, so I compressed all of the main 'blocks' into functions. (This would also prevent the code from running if an error was present.) I don't know if this ...
-1
votes
0answers
20 views

sql query not returning records from DB having timestamp in where clause in shell scripting [closed]

I am trying to get the records from DB using shell script having timestamp in the where clause, but the query is not returning any records. Its shows as "no records found". But the same query is ...
10
votes
6answers
1k views

Is it possible to substitute “then” with brackets?

I first learned how to code in a C language, and using if ( code ) then code fi makes it really hard for me to read my code (don't ask why). Is there a substitute for then? Something like this: ...
-3
votes
2answers
40 views

Transform text records using only a “for” loop

I have an input file that is text, consisting of lines that look like: 352|C|PAID|7036|VOICE|01-FEB-12 I need to split each line into fields at the | (vertical bar) characters and output each field ...
-1
votes
2answers
16 views

OpenDNS automatic diagnostic

I've contacted OpenDNS support because advertising are not filtered on this site http://www.backpackerboard.co.nz/ They asked me to read this manual instructions ...