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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3
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0answers
36 views

Control browser from command line [duplicate]

I have an old router that I have set up as an AP on my home network. For some reason it loses connectivity every few days and needs a reboot. I would like to set up a script to run once every night ...
-2
votes
2answers
91 views

How to delete a directory from terminal?

I'm trying to delete a directory after a series of events take place. That being said, I need to be able to place this in a file to execute once said events take place.
0
votes
1answer
65 views

Script: Running a second process when the firts ended

I am trying to make a script that consist in a two parts. the first one is to run a initial state and the second one is to equilibrating the system. The problem is that the second is dependent of the ...
0
votes
2answers
266 views

Scripting Language Evolution [closed]

I have an assignment due Monday and I need some help because I have no knowledge on the subject and can't even understand what to search exactly. I am not waiting for an essay or something just some ...
5
votes
7answers
9k views

Sort the files in the directory recursively based on last modified date

Sort the files in the directory recursively based on last modified date I have modified a lot of files in my directory want to know what are those files by sorting them by the last modified date ...
5
votes
3answers
740 views

How to rescale several images to same size

I have several image files in a directory. These images are similar size and have same background color. How can I make all images same size by adding background like this attached image?
1
vote
3answers
106 views

awk want to total by hour and variable

I am able to run this and it works fine - note: field $1 is a time/date stamped field.. gawk -F ":" "{ print $1 }" /cygdrive/c/counting/ourlog | sort | uniq -c | sort -r 57339 2014-03-21 09 54290 ...
11
votes
3answers
19k views

Execute a command on user logon

In Linux desktop system, I want to execute a command when the user logs in. After reading some other posts, I tried to insert the command in ~/.bashrc but unsuccessfully. Moreover, the system uses a ...
1
vote
1answer
326 views

Cron task in graphic interface

I need to open one (or more) browser tab periodically and I decided to use cron. The command in the shell (bash) that correctly executes this task is chromium-browser http://mysite.com. If I type it, ...
-1
votes
2answers
474 views

Rename filename.JPG to filename .jpg recursively [duplicate]

Rename filename.JPG to filename .jpg recursively I want all the files with .JPG extension to be changed as .jpg
1
vote
1answer
323 views

how to check if mysql table is used or an application accesses the table in shell script?

A shell script is doing dump for a mysql table, but before dumping the table I want to check if this table is used by any other application. If so, I want to wait and enter in a loop until the ...
2
votes
1answer
87 views

Beginner question about bash “for loop”

When I do, for ((i=0; i<"${ARRAY}"; i+=2)) do echo $i echo ${ARRAY[$i]} done echo $i works as I expected, also echo ${ARRAY[0]} works, but with $i as iterator i see only blank lines. How ...
12
votes
1answer
29k views

Convenient way to check if system is using systemd or sysvinit in BASH? [duplicate]

I am defining common bash files which I want to use across different distributions. I need a way to check if system is using systemd or sysvinit (/etc/init.d/). I need this so I run appropriate ...
5
votes
4answers
1k views

Bash Scripting : Printing column data in the same row

I have written a bash script to calculate the size of a PostgreSQL database and print the output along with the date when the script was executed in a text file. The script code is as follows: ...
4
votes
2answers
1k views

Bash script : help file inside the script or in a different file?

I'm writing a script that has the vocation to be a fully featured program at the end. As far as I know, BASH is enough for his purpose (manage PPA's, kinda like Y-PPA). I would like to know how to ...
1
vote
1answer
114 views

Wait until no incoming network connection for N minutes, then execute a command

I want to put my Debian Wheezy home server to sleep, if it wasn't accessed through the network for a certain amount of time. I thought of a bash script that uses netstat to count the number of ...
1
vote
3answers
1k views

Delete files with same name at the end of the file

Delete files with same name at the end of the file i have a lot of files in my folder and sub directories like ajax_hostel_room_master.php.php class_hostel_registration.php.php ...
1
vote
1answer
4k views

Can Start Service With init.d script, however doing service <SERVICE_NAME> start does not work

I am running CentOS 6 and I am trying to get my Oracle database to run at startup. I have been following these steps: ...
0
votes
1answer
94 views

feeding the password without any terminal window (stdout)

I have a command like this: echo "12345" | sudo abcde where 12345 is supposed to be the root password and abcde a program or a command. I have a shortcut which runs this command. I have tested the ...
9
votes
2answers
483 views

When is it important to write portable scripts?

Most code I write is in PHP. I have recently started learning shell scripting. Most of the resources and tutorials that I've come across are specific to Bash. Some warn about bashisms and some don't. ...
3
votes
5answers
521 views

How can I force a script to use more resources?

I'm running a very time-consuming script which takes many hours to end. Watching top I see that it's only taking 5% of the CPU at best, usually around 3%. Is there any way to force the script to use ...
13
votes
4answers
572 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 ...
2
votes
1answer
60 views

How to run man with formatting in not interactive shell

I have webpage that process ANSI codes and output from man command (underline A as A\x08_) and I call php shell that execute bash -c "<command>" and print the output on the webpage. On the ...
0
votes
2answers
54 views

Help With Simple Script - Absolute, Relative Paths

I'm trying to execute a mono application, without requiring the user to type in 'mono filename'. It's just one line of code: mono ./Bin/jobshop.exe $1 $2 $3 $4 $5 $6 $7 $8 $9 It works great, so ...
2
votes
4answers
216 views

Wrapper command that runs program in temporary directory and deletes it after execution [duplicate]

I want to write a command that: takes another command as its arguments does a 'cd' to a temporary folder executes the command passed in the arguments removes the temporary folder afterwards ...
1
vote
1answer
204 views

How do I rename lots of files on a directory without changing their extensions? [duplicate]

I have a problem! I have a bunch of image files with extensions. Jpg and. Png. I wrote a script that renames the files, changing their names in a pattern followed by a number like this: ... ...
2
votes
3answers
231 views

creation of user add

I'm having more then 59 servers I need to create a script for user add. purpose: if I'm creating a user in one server it will be reflected on all 59 servers. How can I accomplish this?
0
votes
0answers
66 views

replacement script multiple targets

I have this input file Name=code_229633_138;isoforms=1 Name=code_229633_138 Name=code_229633_138;Target=R77_09738T0 Name=code_230519_1;isoforms=1 ...
3
votes
3answers
811 views

if/then/else man page

I would like to know if there is any man page documenting the construction of the most basic script commands like if/then/else, while, for each, and all the relative switches, like -eq, -e, -ge, and ...
4
votes
4answers
4k views

How can I extract/parse a complete URL from a semi random string?

I'd like to have bash parse/extract a full URL (and only the url) from a random short string. Examples: bob, the address is http://www.google.com or https://foo.com/category/example.html is up ...
6
votes
2answers
3k views

What's the most efficient way to grep for two completely separate things and assign the values to separate variables?

CentOS 6.x I want to take the output from curl, grep for two completely separate strings, and assign their respective values as variables. What is the most efficient way to do this (without writing ...
21
votes
2answers
1k views

How do I move all files output from a command?

I have this grep command to find files without the word Attachments in them. grep -L -- Attachments * I want to move all the files that are output from that command. How do I do that in bash? Do I ...
1
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2answers
308 views

Creating a shell script that parses and redirects number into next command?

I am trying to create a script that kills an Xorg process. Here is an example of me running the commands in a terminal: First, I find the process id of the Xorg program (in this case, 2494): . ...
4
votes
4answers
19k views

Check for Process if Same is Running

Is there a script or a way in linux that when I try to execute a shell script/process, if the same is running, it will prompt that same is running and will exit otherwise it will continue.
2
votes
3answers
172 views

grab multiple lines after a matching target line

This question is similar to How to show lines after each grep match until other specific match? thus answers may be similar to those there. I am trying to grab and extract from a file the lines that ...
-3
votes
2answers
15k views

how to execute a python program in a shell script

I have a python program in that I wrote some python code (disk.py). I executed this program using the command python disk.py in a terminal, it worked. Now I want to execute it using a shell script.
1
vote
3answers
1k views

What does “FILENAME=$(echo $INFILE | grep -oE ”[^/]+$“) ” mean?

FILENAME=$(echo /root/Source/code/script.sh | grep -oE "[^/]+$") I know that it would give me the file name from the file path here as script.sh. But can some one please explain me this?
0
votes
2answers
623 views

Using grep to find first two numbers of IP addresses?

I'm trying to figure out how to use grep to pull out only the first two numbers of an IP address in a list. I've got a routine that is isolating the log entires (from Exim) that I need, now I just ...
1
vote
2answers
317 views

How to notice log file changes with Linux standard tools? [duplicate]

I need something that does not need to be installed. It's on an embedded system with very little space on the HD. I can't instal anything. I need to do it with something that is already included. I ...
3
votes
3answers
851 views

Shell Script to move folders containing a specific word

I'm searching for an simple shell script to mv all folders in /var/www/uploads/ that containing Math or Physics in the name to /mnt/Backup/. I've never done something like that before, due to the ...
0
votes
1answer
135 views

Prompting when redirecting content of script to remote machine

I have simple script: #!/bin/bash while getopts ":u:" opt; do case $opt in u) USER="${OPTARG}" ;; \?) echo "Unknown flag has been used: -$OPTARG" >&2 exit 1 ...
4
votes
3answers
275 views

shell script problem with using the operators

I am comparing two strings using the levenshtein distance algorithm. I got the PHP implementation of the algorithm from here. I am calling this php implementation from my shell script as below. ...
5
votes
1answer
3k views

Differences between %pre and %post in Kickstart on CentOS?

I have been setting up machines with Kickstart on CentOS and I am unsure about the differences between the %pre and %post sections of the kickstart .cfg file. The CentOS Documentation for the ...
7
votes
1answer
754 views

Parallel execution of bash script

I have a table URL_Experiment in my database (mySQL database). I have 2 million URL links in this table. For each URL, I am checking if some particular text is present in the URL and updating the ...
0
votes
1answer
142 views

Need to grep for specific lines from ongoing log and save it in some file

So, let me start with the overall outcome that i want to achieve. There is just one log, which will have info on certain devices, that i am upgrading. I use "tailf log" to monitor the log. Now, ...
1
vote
1answer
71 views

Pressing tab after sourcing script file prints script related output

I have a script file in a directory. Its contents are as follows : #!/bin/bash ...
1
vote
1answer
233 views

print all values of a file after removing some characters using grep

I have a file in which the values are stored as below. Assistant Professor at SASTRA University St John's memorial college Paul George Univeristy Department Chair at University of Texas I am ...
2
votes
3answers
4k views

Extracting characters after a particular text

I am extracting a page from website using cURL command. curl "www.google.com" -s | w3m -dump -T text/html > foo.txt The w3m command outputs the HTML page in a much more simpler format so that ...
2
votes
1answer
609 views

shell script construct array for file elements

I have a file named input_file which contains some lines. I need to remove certain characters in the line and store them in an array. So to remove the characters, I use the sed command and storing in ...
1
vote
2answers
264 views

Make Trickle get the correct $PATH

Trickle is a bandwidth limiting program. I have the following script for trickle. #!/bin/bash echo $PATH trickle -s -t 3 -u 200 -d 200 "$@" I have a script in ~/bin/ that want to run the script ...