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

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0
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2answers
614 views

How to match and replace an attribute value inside a tag

I am trying to replace the value of following node using sed command. <KeyValue key="EMPTY_SEARCH_CRITERIA" type="String" value="CS_CODE" comment="Configured empty search criteria."/> I am ...
1
vote
0answers
147 views

Create tree of processes

I'm implementing pstree as an assignment, and I would like to create test tree of processes, but I'm struggling to do so. I tried to do something like this to create tree of background processes ...
1
vote
1answer
128 views

Reading input fields separated by spaces

How can I read in POSIX bash input like this: <name>,<tag1> <tag2> <tag3>… I tried while read line;do done but this wants newlines, all I have is spaces. (Is IFS solution? ...
1
vote
1answer
53 views

Searching a filename

How to search a file with a given String and currentTimestamp and if not found trigger a mail? For Ex-:I have to search a file whose filename would be like filename_05172015 and trigger a mail if not ...
-1
votes
1answer
211 views

Shell Scripting - return to previous loop until process is completed then die/done

I am writing a bash/shell script to automate some file filtering functions. I am stuck due to being new to scripting and I am not sure how to code the function in it to keep looping the top section of ...
1
vote
1answer
123 views

Assigning ls output to a variable gives unexpected behavior

I was writing a script to clean a text file from a directory (I know,it's a bad idea but I really need it) and I wrote this: #!/bin/bash var=$(ls -p /direcotry/to/file | grep -v /) truncate -s 0 $var ...
3
votes
2answers
104 views

Create a file of pairs from pairs

Say I have the following file: A 1 B 2 CC 33 And I want to create a file containing every combination of two from the previous file, like this: AA 11 AB 12 ACC 133 BA 21 BB 22 BCC 233 CCA 331 CCB ...
2
votes
2answers
2k views

Is there any way to send sms to a mobile number using shell script?

I want to send sms periodically to certain Mobile numbers (Indian mobile numbers.) Is there way I can send with my own cellphone number or by creating account in sites like way2sms , etc. Thanks in ...
0
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1answer
71 views

Cannot get interface information using read

The following link has a script to get system information: z3bra' blog Specifically, network() { read lo int1 int2 <<< `ip link | sed -n 's/^[0-9]: \(.*\):.*$/\1/p'` if iwconfig $...
-2
votes
1answer
385 views

How to properly use awk in ksh?

I have: 1 #!/bin/ksh 2 BEGIN { print "START" } 3 { print "Hello World" } 4 END { print "STOP" } 5 6 7 exit 0 then when I try to run the file the following errors appears: ...
1
vote
2answers
517 views

Script to read line by line from a file pipe that to another command and output to another file

I've got this weird old app that I'm trying to support and it stores the passwords in plain text and I'd like to hash them. I'd really like to have an input file in csv with a username,password for ...
2
votes
2answers
484 views

How can I start a file-processing daemon? [closed]

How can I run a script-based tool which will process files continuously downloaded to given directory as they arrive? I'd like to minimize delay (~1 second is OK), script can have own infinite loop. ...
1
vote
1answer
273 views

Create SOX batch script to extract first 15 seconds and rename multiple files in folder

I have a folder with several MP3 files that I need to extract 10-15 seconds of audio from. I would also like to rename these by appending sample-(name).mp3 to the converted files. How can I do this ...
2
votes
1answer
12k views

Run ./script.sh vs bash script.sh - permission denied

When I try to run ./script.sh I got Permission denied but when I run bash script.sh everything is fine. What did I do wrong?
0
votes
2answers
384 views

Create user from bash script

I'm in the process of making a bash script to automate adding a user. My password always have pattern, so I am setting that to a variable then... (this is where I am stuck -encrypting-). I found this ...
3
votes
1answer
830 views

Can I change how select options are displayed?

I'm working with select and case in bash. I currently have nine options, which makes a nice, tidy, 3x3 grid of options, but it displays like so: 1) show all elements 4) write to file 7) ...
0
votes
2answers
60 views

makeing a script to change Java SDK

I actually have the script running, but I think it's not very efficient and the only way to get it to take is to run it as "source change-java.sh" Is there a way to get it to not have to output to a ...
3
votes
2answers
275 views

How to use a bash function like a regular command in a pipe chain?

I'm performing several commands on large files from within a bash script. In order to monitor the progress I use the pv command. An example command could look like this cat $IN_FILE | pv -w 20 -s $(...
3
votes
3answers
132 views

How can I list every port serving a web page

I have a number of servers, all with various HTTP(S) services accessible on a variety of ports. It's incredibly difficult to keep track of which service is available under which host and what port. ...
0
votes
2answers
964 views

Files greater than 1 GB and older than 6 months

I want to find files which are greater than 1 GB and older than 6 months in entire server. How to write a command for this?
0
votes
3answers
370 views

How to loop through lines in a file which contains * in each line

I have a file that contains about 800 lines. All the lines contains 1 * character in it. I need to loop through the lines in the file so I used the following simple for loop for i in $(cat ...
0
votes
0answers
349 views

How to detect the user has logged in a domain or local host in the linux shell script?

In the default, the linux doesn't support the domain. But the user can join a domain by applictions, such as: Likewise, Winbind, and so on. For my project, my customers are all enterprise members. For ...
-2
votes
1answer
52 views

Batch Renaming Script [closed]

Edited this question to try and clarify. I'm trying to write a simple renamer script to change files in the current directory 'test1.txt, test2.txt, testcab.txt' etc, to 'edit1.txt edit2.txt editcab....
1
vote
1answer
94 views

Resend (bounce) a message with attachment in mailx (or any other tools)

I've got a mail folder which contains a unique e-mail containing several attachment. I'd like to script the resending of the email as verbatim as possible. If I write cat tosend | mailx some-...
0
votes
3answers
132 views

How to make a single line into two new lines [duplicate]

I want to make a single line into two new lines. My code: #!/bin/bash dir="$1" printf "maximum file size: %s" \ find $dir -printf "%s %p\n" | sort -n | tail -1 with the ...
2
votes
1answer
136 views

Force a job to come in foreground when asked for user input

I'm currently working on an audit-script for a huge platform. In the main-script we use traps and in one of the traps I ask the user for clean up the files. The script has no output in standard output,...
2
votes
1answer
91 views

Finding business date within range

Please assist in finding only the business date (Mon-Fri) from the below (in bash) #!/bin/bash startdate=20141030 enddate=20141120 dates=() for (( date="$startdate"; date != enddate; )); do ...
1
vote
4answers
465 views

Comparing files with vimdiff from a script

I'm writing a script to compare two directories recursively and run vimdiff when it finds a difference: #!/bin/bash dir1=${1%/} dir2=${2%/} find "$dir1/" -type f -not -path "$dir1/.git/*" | while ...
5
votes
1answer
431 views

How do I store colored text in a variable and print it with color later?

If I do git status --short, git lists files that are not tracked with two red question marks in front: I'm trying to store this in a variable and print it with color later. Here's my bash script: #...
1
vote
1answer
647 views

Using MPI with a .sh script?

I am a beginner with Unix and MPI. I have a runPR.sh script as below DIR=/directory/buildagain/bin/Project FILELIST=$1 while read FILE do echo "Processing ${FILE}..." ./makeInp.sh ${...
0
votes
1answer
115 views

Ubuntu changing shell on me

This Ubuntu machine is showing errors when I start a new terminal. The problem is this: When bash completion is sourced (. /usr/share/bash-completion/bash_completion) the shell taking place is not ...
-2
votes
1answer
331 views

How to find files with the smallest size in a directory

I need to find all files of the smallest size in a directory. My code so far: #!/bin/bash dir="$1" printf "minimum file size: %s\n" du $dir -hab | sort -n -r |tail This code ...
1
vote
2answers
153 views

How to preprocess CUPS' `lp` with a script for a specific printer?

(How) Is it possible to preprocess lp automatically with a script? Piping inbetween (fileToPrint | script.sh | lp -d myPrinter) is no option for me, because I have a lot of source code that does lp ...
-1
votes
1answer
80 views

Getting an error to find directory is empty [duplicate]

I have a requirement that create a script name say ./123.sh when given a path to directory it should print the file or files with minimum, maximum and average file size . eg $> ./123.sh /usr/share ...
0
votes
2answers
386 views

status command doesn't recognise `-p` option in Ubuntu

status -p $pidfile -l $lockfile $prog This command works on CentOS - /bin/sh shell. But when I try to run the same command on Ubuntu 14.04 with /bin/bash shell (or zsh as well), it throws error, ...
1
vote
2answers
292 views

Apply a filter to the value of a variable using backticks

Sorry for asking such a simple question, but reading about this issue on the internet has proven fruitless. I'm trying to better understand the grave/backtick operator and I've been doing okay so far ...
1
vote
1answer
145 views

Combine Bash associative arrays

I am trying make a script that combines arrays on demand. Here is the script: #! /bin/bash declare -A code code=( [H]="h" [E]="e" [L]="l" [P]="p" [M]="m" [E]="e" ) I need to print "help me" - ...
3
votes
1answer
4k views

Copy a file and append a timestamp

I've got two issues with my script that copies files and adds a timestamp to the name. cp -ra /home/bpacheco/Test1 /home/bpacheco/Test2-$(date +"%m-%d-%y-%T") The above adds Test2 as the filename, ...
0
votes
3answers
171 views

Reorder lines in each 3-line record

I have a file which contains lots of records in following manner. Name Address Phone This is the sequence for each record in that file. Now, I want to copy this file to other file with changed ...
2
votes
1answer
271 views

Writing a tab completion script for bash

I made a shell script that reads input from user and kills a process. But in bash if the user presses Tab key then bash suggests some keyword or file names. My script however doesn't suggest anything. ...
1
vote
1answer
2k views

Using sed to replace a string with special chars with another string with special characters

I'm trying to automate switching out a bash prompt for another in .bashrc Original String: PS1='${debian_chroot:+($debian_chroot)}\[\033[01;31m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\$ ' ...
3
votes
3answers
6k views

variable definition in bash using the local keyword

I'm learning bash scripting and found this on my /usr/share/bash-completion, line 305: local cword words=() What does it do? All tutorials online are just in the format local var=value
-1
votes
2answers
75 views

Processing numbered files via bash

I have a set of files a.rst.1, a.rst.2, ...., a.rst.5000 I need to run this command for each one: ambpdb -p prmtop < a.rst.x > a.pdb.x Where x represents the number for that file. Is there ...
3
votes
5answers
2k views

how to check directory is empty

I have a requirement, if I execute a script ./123 with an arguments of empty path, say /usr/share/linux-headers-3.16.0-34-generic/.tmp_versions(this directory is empty). It should display "directory ...
-1
votes
2answers
900 views

How to split output lines into multiple lines (only lines not files)? [duplicate]

My requirement is display output lines into mutliple lines My code is: #!/bin/bash dir="$1" echo -n "file size:" du="$(du $dir -hab | sort -n -r | tail -1)" printf "%s\n" "echo "$du"" It's ...
2
votes
1answer
125 views

How create a Init Script LSB Header for this script in Debian?

I have this script below, but how can I create an LSB Header for it in Debian? I want to put in my init.d. I know that for Fedora is ok, but for Debian I don't know. Or where and how I put in rc.local?...
0
votes
1answer
83 views

Pass sequence to a bash script

I'm looking for a way to pass an arbitrary sequence of numbers to a bash script. I know about seq. However, the key word here is arbitrary. For example: $ ./do_foo 2,4,5 Should perform something ...
0
votes
1answer
64 views

Ping: Result shows 56(84) instead of what is expected

I'm trying to modify a script to show lost packets as well as ping results. I'm only including the section that isn't working as some of the commands in the script are company specific. for myHost ...
1
vote
1answer
122 views

Cygwin, bash, change an environmental variable?

I have set up a Cygwin environment on my machine (Windows 8.1). pol@pol-lap1 ~/Downloads/software/database/firebird/Firebird-2.5.4.26856-0 $ `set | grep unknown` BASH_VERSINFO=([0]="4" [1]="3" [2]="...
0
votes
3answers
261 views

Removing line-breaks, whitespaces and tabs from every file

Say I have a folder with 10K text files. I would like to remove every space, TAB and linebreak from each file. How can I do this efficiently?