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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6
votes
1answer
248 views

How to change Vim's command type mode programmatically?

Is there a simple way to switch from one command type mode to another without loosing the current command line? In my ~/.vimrc file I remap the <space> and <c-space> character, coming ...
0
votes
0answers
26 views

bash script loses readonly value after first time thru loop

I have a bash script which seems to lose the value of the readonly constant after the first time thru the for-in loop. For example: #!/bin/bash readonly DIR="./groups/" for output in "${array[@]}" do ...
-2
votes
0answers
18 views

Modify Perl Menu [on hold]

Here is my code so far: #!/usr/local/bin/perl -w use strict; use Cwd; while ( 1 ) { print "\n COMMAND MENU\n"; print "\n a. Current date and time\n"; print "\n b. Users ...
2
votes
1answer
676 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 ...
4
votes
2answers
135 views

Faster way to rename duplicate files (identified by fdupes) in another directory?

I have a directory full of pdf files of journal articles, most of which are named by their bibtex key. Some time ago I made a backup on an external hard drive, but I haven't kept it up to date and ...
1
vote
3answers
53 views

List all the html tags in a file

I want to know if there is a way to list all the html tags in a file. Lets say I have a file file.html <html> <head> <title>Test</title> </head> <body> This is a ...
1
vote
2answers
163 views

How to iterate through multiple file extension without caring about case sensitivity?

I've seen various topics on how to iterate through multiple file extensions but in most case, the list is defined. example: for file in ${arg}/**/*.{txt,h,py} do .... done As can be seen, ...
8
votes
4answers
301 views

Do you prefer bash scripts or aliases for shortcuts?

I have a ~/bin directory (which is on my PATH) where I store a lot of little 1 or 2 line scripts. Some of them just cd into a directory and run a command on a file, like vim or something. But I also ...
2
votes
2answers
28 views

I seem to be “losing” this prompt. What is happening?

I ssh into an ubuntu 12.04 cloud server and start a web server like this (w/ bash): $ nohup python tserver.py & [2] 2122 $ nohup: ignoring input and appending output to `nohup.out' After I run ...
5
votes
3answers
175 views

How to iterate through a list of files with spaces that is sorted (case insensitive)?

I am doing this in OSX which uses bash but obviously, not all bash conventions are used so hopefully your suggestion is available to me :) I have the following files fun bar1.txt Foo bar2.tXT ...
1
vote
2answers
418 views

Import single rows from SQLite to MySQL?

I need to do some kind of incremental import again and again from a SQLite 3 database to a MySQL database. Column names are the same in both databases. Is there a good way to do this by a script ...
2
votes
1answer
25 views

Fetching Remote Windows System Information From Linux Server

I need a script/command that would fetch Windows System Information (Host Name,User Name, Domain, OS Info, Hardware Info, Memory Info, processor Info, etc) by running it on a Linux Server (RHEL 6.5 ...
6
votes
2answers
67 views

Passing arguments from a file to a bash script

I' ve got this situation: ./ ./myscript.sh ./arguments.txt ./test.sh Inside myscript.sh, i have to run the file test.sh, passing to it the arguments contained inside arguments.txt. myscript.sh is: ...
1
vote
1answer
451 views

Script that unpacks a initrd, allows editing of the preseed.cfg and the packs it to cpio and gzip again

I want to program a script that allows what is said in the title. So basically I gunzip the initrd, than unpack the cpio, open vi to allow editing, save, pack with cpio, and gzip again, so nothing ...
10
votes
6answers
3k views

What are good online resources for learning shell scripting? [closed]

I am a beginner to shell scripting. I have not yet hardly coded a single program, but I am interested in learning it completely. Can anyone suggest some good online resources which will guide me?
4
votes
3answers
241 views

awk with if statements

I am trying to print from a file using awk, but my output is empty. Here is my code so far accountNum=$1 while read -r LINE || [[ -n $LINE ]] ; do awk -F',' '{ if($1==accountNum) { print ...
1
vote
1answer
639 views

setcap error on Debian Squeeze: “unable to set CAP_SETFCAP effective capability: Operation not permitted”

My python script needs at least the CAP_NET_RAW capability, because it's using a pcap library, but I don't want to use sudo (and in fact sudo causes my script to not work properly, with the script's ...
0
votes
2answers
74 views

Awk printf number in width and round it up

I need to printf a number out, but with given width and rounded (with awk!) %10s I have this and somehow I need to connect the %d but everything I do, ends up with too much parametres for awk ...
2
votes
2answers
46 views

Renaming the files and move to other path

I need to rename the files given below and move to some other path 1234551abcde20140718023216001.txt.809047512.2014_07_07_13:47:44 000001abcde20140718023216001.txt.34568.001.2014_07_07_13:50:44 ...
1
vote
0answers
24 views

Converting .docx files to plain text and preserving line breaks to maintain line number references to source document: howto & implications?

I'm exporting MS Word content to plain text for use with text&file utilities. I have a constraint where the line numbering feature has been enabled in the MS software, and any reference to line ...
155
votes
22answers
78k views

Repeat a Unix command every x seconds forever

There's a builtin Unix command repeat whose first argument is the number of times to repeat a command, where the command (with any arguments) is specified by the remaining arguments to repeat. For ...
0
votes
2answers
61 views

Solution to integer expression expected [closed]

So I when I run this code on my mac there are no errors, and it provides me the perfect output. But when I run it on Ubuntu or CentOS i get the following error integer expression expected ...
3
votes
1answer
27 views

Copy image from clipboard to file

Is it possible to take an image from the clipboard and output it to a file (using X)? I can do this with text easily: $ xclip -selection c -o > file.text But when I try the above with an image ...
3
votes
2answers
42 views

The reverse of `tree` - reconstruct file and directory structure from text file contents?

We all know we can use tree to get a nicely formatted text "visualization" of the structure of a directory; say: $ tree -spugD /usr/include/boost/accumulators/numeric/ ...
2
votes
2answers
47 views

Pass argument to script, then redirect script as input to bsub

I am currently working with the bsub job submission system from Platform LSF. I need to submit job scripts, but I am running into a problem with passing arguments to the job script. What I need is as ...
0
votes
1answer
29 views

Reusing user input in a script

I have the following script which works: #!/bin/bash xfreerdp /cert-ignore /f /v:farm.company.com /d:company.com /g:rds.company.com /u:$(zenity --entry --title="Username" --text="Username") ...
3
votes
1answer
47 views

Run command based on output of another command

OS: AIX 7100-04-1216 So basically I'm trying to write a for loop that sees which volumegroups I have on my system, which filesystems reside in those volume groups and what the size of each of those ...
18
votes
4answers
7k views

How do I exit a script in a conditional statement?

I'm writing a bash script where I want to exit if the user is not root. The conditional works fine, but the script does not exit. [[ `id -u` == 0 ]] || (echo "Must be root to run script"; exit) ...
2
votes
3answers
56 views

How to add a new line for a missing entry between two fields

I have this file. As you can see in column1, entries TEST01N03, TEST01N06, and TEST01N18 are missing (total of 18 entries). Is there a way to check the fields of this column and fill in the missing ...
0
votes
2answers
98 views

If UID=1000 continues, else exit

I am wondering how to implement the following in a bash script. if UID=1000, continue else exit confirm choice (y/n)
3
votes
1answer
104 views

Converting and rescaling a lot of png images to jpeg

I have a lot of .png images in a folder. Is there a command (or software) that can convert all them to .jpg and (simultaneously) rescale the created .jpg files to 25% of their original size?
1
vote
1answer
38 views

Why does the same sed regex (after grep) fail when run in a bash script vs bash command line?

Here's the script. It is successful when I run it from the BASH prompt, but not in the script. Any ideas? When I say "fails," I mean the sed regex doesn't match anything, so there is no replaced ...
0
votes
2answers
56 views

How to count number of instance of a word starting at another word

I need to grep the MySQL-error log starting at today's date formatted like: `date +"%y%m%d"` (140710) And look for all instances of the word partitioned. I've tried various things to no avail. ...
1
vote
1answer
52 views

How to run java service as a non-root user on CentOs 6

I have a script that starts a Java application as a service on CentOS 6: #!/bin/sh # chkconfig: - 80 20 SERVICE_NAME=cn4server PATH_TO_JAR=/usr/local/share/myserver/cn4server.jar ...
4
votes
4answers
4k views

Automated ssh-keygen without passphrase, how?

I would like to make an automated script that calls ssh-keygen and creates some pub/private keypairs that I will use later on. In principle everything works fine with.... ssh-keygen -b 2048 -t rsa -f ...
2
votes
0answers
10 views

How can I run a KDE plasma script from command line without GUI?

I want to run a plasma JavaScript file from command line, but the only solution I found so far involves a graphical script editor and requires a user interaction to run the script: qdbus ...
0
votes
1answer
41 views

Converting windows date logic into Unix [closed]

I had coded the below logic in Windows batch scripting and I need to replicate the same in Unix. # Calculating Yesterday's Date for /F "tokens=1-4 delims=/- " %%a in ('date/T') do set DY=%%c for ...
1
vote
1answer
249 views

Using EXIFTool to add EXIF data from filenames

There is a set of photos with timestamps in their filenames like these: Photo on 3-09-12 at 9.24 PM #2.jpg Photo on 3-09-12 at 9.24 PM #1.jpg Photo on 3-09-12 at 8.23 PM.jpg etc. ("3-09-12", ...
4
votes
4answers
5k views

How to totally fork a shell command that is using redirection

I've written quite a few shell scripts over the years (but I'm certainly not a sysadmin) and there's something that always caused me troubles: how can I fork a shell command immune to hangups in the ...
1
vote
2answers
63 views

SCP Automation in production environment [duplicate]

I want to implement the use of scp command in a production environment. I don't want to provide my password in the automation script. Is there any way? I need step by step solution.
1
vote
2answers
80 views

Shell Script - how to scp into remote server and download files and protect password

I have a remote server that I need to download Apache logs from. I can manually scp into the server and get the files, but I'd like to put this in crontab. The only way to automate it is to include ...
3
votes
2answers
140 views

Make ls distinguish scripts from binaries in output

Is it possible to make ls distinguish executable scripts from actual compiled binaries? The permissions are most often the same (+x), and with ls -F you get an asterisk suffix (*) for both, so it's ...
7
votes
2answers
122 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 ...
13
votes
7answers
28k 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 ...
1
vote
1answer
33 views

failed to stuff “ctrl-a H” to a screen session

I need to toggle logging from outside of a detached screen session. Interactively you do this by pressing ctrl-a H. Their octal codes are \001 and \110. (source) What I tried: $ screen -S test ...
2
votes
2answers
2k views

grep output of expect script

I'm trying to run some expect language, and grep/parse the output all in one script. I want to grep the output of and look for "error" (I should note that standard linux commands like awk, sed, grep, ...
0
votes
1answer
33 views

Configure localtime. dpkg-reconfigure tzdata

I'm using this to configure localtime: dpkg-reconfigure tzdata It is ncurses interface. I'm looking for the way to programming this. Is there true way without user ncurses interface? How to ...
0
votes
1answer
305 views

Using alias in another script (ksh)

I'm writing a ksh script, and I'd like to use a command define by an alias in my .profile file, in my script. I tried this command in the folder containing my script, and it works. However, in my ...
0
votes
1answer
415 views

How to execute Netscaler commands through a remote machine via SSH connection

I have been trying to execute some NetScaler commands like "bind" & "unbind" through a Linux Box via an SSH Connection. Now the Problem is, Manually we are able to enter & execute commands on ...
5
votes
4answers
1k views

Split PDF into documents with several pages each

There are several resources on the web explaining how one can split a PDF into many files with on page per file. But how can you split them into chunks of, say, five pages each? I have looked into ...