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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7
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4answers
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Parallel execution of a program on multiple files

I have a small script that loops through all files of a folder and executes a (usually long lasting) command. Basically it's for file in ./folder/*; do ./bin/myProgram $file > ./done/$file ...
2
votes
1answer
147 views

How do I detect whether changes in nano were discarded or saved?

I am currently writing a small setup script for a Linux application that needs the user to edit a configuration file before the application is started. I've chosen to make the script simply open the ...
5
votes
4answers
1k views

How to add a line to a file which has only root write permission and to continue the script execution

I am trying to learn bash scripting. I am working on a practical problem and at one point I need to add a line to a file which requires root permission to write. The code looks like this: # some ...
1
vote
2answers
937 views

how to detect command interpreter from within a shell script [duplicate]

Possible Duplicate: How to test what shell I am using in a terminal? For example the following script #!/bin/bash issue_interpreter_name would issue: bash
1
vote
2answers
1k views

How can I rewrite the From: address of an email and resend it?

I have a cPanel web hosting account. On this account I have a PHP-based support/trouble ticket system for my customers to use. I'd like to be able to send an email to both my customer and to the ...
4
votes
2answers
1k views

How can I run my own scripts in kate 3.8.2? “External tools” isn't available in the plugins section

I am using Kubuntu 12.04 LTS. How can I run my own scripts in kate 3.8.2? It appears that the plugin named External tools is no longer available. I would like to run Python or shell scripts in kate ...
3
votes
2answers
415 views

issues with GNU tail -f and combination of commands

$ tail -f /logs/filename.log | awk '!(/list)' I am able to run this command in GNU Linux flavour But when I written in a script it is not working. test.ksh: variable="/logs/filename.log | awk ...
4
votes
3answers
1k views

command line audio with mpg123 - how to save position in audio and begin from that location next time?

I am contemplating using mpg123 as an audiobook player. I can't find any other good audiobook players for Linux, and I think mpg123 may be my best option. My audiobooks are organized by directories ...
4
votes
3answers
5k views

using stat to provide timestamp for touch

Am trying to OCR some documents insitu (from a linux command line on a windows share). The process of OCRing is find and I have muddled through using the find command to pipe the files through the ...
2
votes
2answers
2k views

Scan for Network attached devices

Is there a way to scan for computers on the network through the command line and get their IP, MAC and DNS names without knowing anything about them?
4
votes
3answers
808 views

What does the following Bash script mean/do?

What does the following script mean? exec 4<&0 0</etc/XX/cfg read line1 exec 0<&4 UPDATE Thanks for the answer, just one part I'm not sure: It redirects fd0 to fd4, and ...
2
votes
2answers
232 views

Verify if a system has DVD burners?

Is it possible to verify if the system has a DVD burner installed? I need this for a script.
3
votes
2answers
2k views

How can I force a bash loop to end if it runs x times in x seconds?

I'm trying to grab batches of input from a remote pipe via ssh. My script below works ok, but I would like to add some sort of check into it so that if something were to go wrong or break the loop ...
4
votes
2answers
641 views

List of script( location)s that get run automatically, and when?

Does anybody know (of a resource listing) what scripts are run automatically, and when, from the moment I startup the computer until it's shutdown again. I know several places where I can add scripts ...
9
votes
6answers
950 views

Text Manipulation Across multiple lines

I Have a file that has text like this: AAAA BBBB CCCC DDDD 1234 5678 9012 3456 EEEE 7890 etc... And i want to match up the Alphabetic lines with the Numeric lines so they are like this: ...
2
votes
1answer
1k views

LVM2: Obtaining lv and vg names from path (volume group name and logical volume name)

Let's assume we have lv path: lvpath=/dev/mapper/vg2-Music Than I split lvdisplay -c with cut: vgname="$(lvdisplay -c "$lvpath" | cut -d ':' -f 2 )" lvname="$(basename "$(lvdisplay -c "$lvpath" | ...
4
votes
4answers
6k views

Backup of LVM2 logical volume

I'd like to make backup on external drive of LVM2 logical volume in dd manner. Approach I consider is to make lv on extranl drive with identical size copy with dd (Please let me know if you see ...
1
vote
1answer
2k views

Run expect inside a bash script as another user

I am writing a bash script to install some small software I'm developing. That script is run with sudo (as root), but some of the commands that are executed by the script need (or should be) run with ...
0
votes
2answers
300 views

How to generate Zipf-like samples, by using scripting language

Is there any scripting language function (like in python or bash) that samples from a zipf-like distribution, for exponent 0<a<=1. PS: I am aware of existence of a numpy function that can ...
3
votes
1answer
851 views

Auto-login to internet script

For me to connect to internet I need to login first. Normally I do this manually (by opening my browser then at the first URL I enter I am redirected to the ISP's login page). However there is a Perl ...
4
votes
2answers
4k views

Sed: replacing digits

I am trying to write some install scripts for when I install/upgrade Ubuntu. I'm having trouble with fixing logrotate.d: /var/log/ufw.log { rotate 7 weekly missingok notifempty compress delaycompress ...
2
votes
3answers
629 views

dynamic display of a running process?

I am writing a script and acording to that when i run it certain info will be displayed on the output screen. for example say the constant data displayed is: my name is mukesh. i am 27 years old ...
0
votes
2answers
1k views

Need help to make rows into column with awk or sed

Recently, I look for scripts to take this: This; Is; First; Line; and make it like: This Is First Line
2
votes
1answer
1k views

Is there a shell utility for printing the contents of a plist? Preferably for a jailbroken iOS device?

I need a tool that prints the actual text in a plist file (plutil changes the format, cat prints gibberish, and there is no defaults command for iOS). It needs to be in a script, so text editors don't ...
6
votes
1answer
374 views

Is it possible to write portable service scripts to control a daemon?

I (or one of my colleagues) need to write one or more shell scripts to control the execution of a daemon. We need to be able to start the daemon, tell it to gracefully shut down, and force a shutdown. ...
5
votes
6answers
4k views

Linux script or program to shorten filenames

I haven't had much success in finding a Linux version of namemangler, which I need to rename 1000 of files so they are readable on Windows. Does anyone know of a Linux program that can do this? If ...
4
votes
3answers
352 views

Converting a history to a script?

Often times I've typed in a bunch of commands when I realize that I am going to keep typing them in and that I would really like a script. Now I understand that no matter how I save my history, I am ...
1
vote
1answer
72 views

Is S25mdadm start script priority correct?

(On Ubuntu 11.10 - configuration inherited from 10.10) Occasionally the boot process seems to suffer a race condition where a starting process misses some of the Raid-1 FSes, build via mdadm. ...
-3
votes
1answer
2k views

How to show the percentage progress of script execution in Unix?

Suppose you run some script such as a perl or tcl. For example, $ ./script.sh; ./script.pl; source script.tcl. It takes some time to get executed and return to prompt. How to display the percentage ...
0
votes
2answers
1k views

How to calculate in linux number of file inside nested directories?

I need to extract information how much files are in some directory tree: /.../testRoot/test1/test11/..../file1 /.../testRoot/test1/test11/file2 /.../testRoot/test1/test11/..../file3 ...
5
votes
1answer
2k views

Execute Script automatically at shutdown on Fedora 15/16

With fedora 15 or 16, I don't find the directory for execute a shell script automaticaly at shutdown...
3
votes
3answers
13k views

Pass command line arguments to bash script

I am new to bash script programming. I want to implement a bash script 'deploymLog', which accepts as input one string argument(name). [root@localhost Desktop]# ./deploymLog.sh name here I want to ...
-1
votes
2answers
266 views

Shell programming temp=$1 vs temp=1

What's the difference between temp=$1 and temp=1? Why do I need the dollar sign? For example: #!/bin/bash temp=$1 cell=$((($temp-32)*5/9)) echo $cell
0
votes
2answers
254 views

Autentification on SSH connection in OneLine [duplicate]

Possible Duplicate: Shell Script for logging into a ssh server I need to connect via SSH to a remote server, however I must do this with out interactive mode and with out use Public keys ...
1
vote
1answer
326 views

selective stdout , stderr and logging using the script command [duplicate]

Possible Duplicate: Show only stderr on screen but write both stdout and stderr to file stdout , stderr and logging using the script command cat test.sh: rm -v foo.tmp date pwd cat ...
1
vote
2answers
447 views

stdout , stderr and logging using the script command

I have remove.sh which contains: rm -v test.tmp And I have install.sh which contains: script remove.log -c './remove.sh' What can I do so that whether or not test.tmp exists, I don't see any rm ...
0
votes
1answer
956 views

Why isn't /etc/rc.local executed when I log in?

I'm trying to run a script at login, and this is the way I've found to do it. I'ved edited /etc/rc.local with a line such as bash /home/me/script.sh. I've made that script executable. It doesn't ...
1
vote
2answers
1k views

Issue with mv command in a script

This must be a very simple issue to solve, but I am stuck (not a UNIX pro). I need to move a gz to a target directory, but I get a No such file or directory. NOW=$(date +"%Y-%m-%d-%T") ...
3
votes
1answer
748 views

merging files and getting column values based on id field

bash-3.2$ cat sample.log sample.log.1 sample.log.2 ID COL1 COL2 COL4 1 col1 col2 col4 2 c1 c2 c4 3 co1 co2 co4 ID COL3 COL1 1 col3 col1 2 c3 c1 3 co3 co1 ID COL1 COL2 COL3 1 col1 ...
16
votes
4answers
25k views

File extensions for unix shell scripts

On wikipedia, the article for .sh says: For the .sh file extension type, see Bourne shell. How about other unix shells? I know that the shebang is used inside the file to indicate an ...
1
vote
2answers
329 views

$2 (field reference) in awk BEGIN is not working

In the following snippet, $2 in awk is returning empty. What am I doing wrong? I am trying to find the difference between MAX and MIN. #!/bin/ksh if [ $# -ne 1 ]; then echo "Usage: sh ...
3
votes
2answers
2k views

Invert results for “for in * do”-loops [duplicate]

Possible Duplicate: How do I reverse a for loop? Is there an easy way to invert a for in loop? For a script I want to process files in their reverse order. So instead of: for file in ...
3
votes
4answers
2k views

passing passwords to a script

I want to scp a file to a remote host, and from there, run a command on the file, and exit the remote session. If I write a usual script, call scp and then ssh, I am prompted to enter two passwords. ...
4
votes
1answer
450 views

Efficient way of comparing in awk

#!/bin/awk BEGIN { while(getline var < compareTo > 0) { orderIds[var]=var; } } { if(orderIds[$0] == "") { print $0; ...
0
votes
3answers
228 views

help with script; if status is this do that if not do something else

I need to write a script that checks on the status of something. If the status "Copying" then exit (or retry in 60 minutes if we want to get fancy.) If all there is nothing returned (based on my ...
14
votes
7answers
45k views

Execute remote commands, completely detaching from the ssh connection

I have 2 computers, localpc and remoteserver. I need localpc to execute some commands on remoteserver. One of the things it needs to do is start a backup script that runs for a number of hours. I ...
7
votes
2answers
1k views

sync files recursively between two folders where files are less than 24 hours old

I want to find all the files under a directory which are within 24 hours then rsync those files with another server. There are some old files that I do not want to transfer, however if those old ...
3
votes
1answer
759 views

Export a m3u playlist to a directory in order they appear in the playlist

There is a way to rsync a m3u playlist into a destination directory. How can I process the list and number the output so it orders the files to match the playlist order? For example the m3u: ...
5
votes
1answer
603 views

Giving a custom script root permissions

I have a backup drive that is Truecrypt Encrypted. I'd like to automnt this drive so I can automate backups when in the office. I am using Linux Mint 12 x64bit I wrote a script that runs successfully ...
3
votes
3answers
482 views

How to make svn look for if there is an update once a minute and if there is call some script?

I am developing a server app. I have a remote machine with Debian that I use for testing. Currently I update the server manually when each new svn version comes out. It is just a testing server and ...