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

learn more… | top users | synonyms (2)

3
votes
1answer
544 views

Color script output only when invoked from interactive shell

I made a bash script producing colored output. The colors are fine when the script is called from an interactive shell. However, if the output is processed in another script, or passed through a pipe, ...
6
votes
4answers
2k views

Tool to create text files from a template

I have to regularly create 100+ text files from templates. I currently use an overly complicated shell script. I think there is a smarter way to handle this, but I don't know how. I have a "database" ...
3
votes
1answer
1k views

Capture screen content for error parsing

I am a database administrator working with DB2 on AIX. (Please continue to read as this is related more to ksh than DB2, otherwise I would have posted this over on dba.stackexchange.com.) I am ...
3
votes
2answers
1k views

Error when subtracting two negative numbers in ksh: “assignment requires lvalue”

I am trying to debug someone else's script: The code line is: y=$((${oldvalue[$x]}-${newvalue[$x]})) y gets calculated fine as long as both sides are positive numbers. However, I have a ...
5
votes
2answers
3k views

How to continuously take backup of log files?

I have some applications in Lunux which creates Log files of around 41 MB each. The log files switches from log.1 to log.2 and starts overwriting log.2 once this 41MB is completed in log.1 file. I ...
3
votes
4answers
2k views

bash string extraction

I would like to extract the 2nd field from the last part of the following strings: foo_1.103.debug_xx.ver21-inc-1 --> string extracted "debug_xx" foo_1.103.1.0.release_32_xx.ver21-inc-1 ...
2
votes
1answer
2k views

Bash variable in Awk script

I have this flat file database(ff_servers.db) with following contents: 192.168.154.2 Alaska hp 192.168.157.3 Colorado dell 192.168.156.3 hawaii hp From command line, I could run: awk ...
3
votes
2answers
826 views

Shell script debugging

I was wondering if there is an IDE that would allow me to define an ssh connection to a remote host, connect, and locally debug a script running remotely (kind of like you can debug a remote Java app ...
2
votes
1answer
82 views

Listing script's file dependencies

Given a shell script, is there an easy way to extract what files it manipulates explicitly (so not like concatenating some command and than eval-ing it)? E.g. #!/bin/bash . /etc/someconfig.cfg ...
8
votes
1answer
1k views

what is the zsh equivalent of bash's export -f

So I started using zsh. I like it all right. It seems very cool and slick, and the fact that the current working directory and actual command line are on different lines is nice, but at the same time, ...
7
votes
4answers
5k views

Preserve directory structure when moving files using find

I have created the following script that move old days files as defined from source directory to destination directory. It is working perfectly. #!/bin/bash echo "Enter Your Source Directory" read ...
2
votes
2answers
181 views

Does a parent bash script remember the cd history from a child bash script?

Example: mainscript.sh cd /mnt/something ./buildscripts/000-script.sh 000-script.sh cd /mnt/otherthing mkdir something exit
-1
votes
1answer
167 views

Error while running bash script that moves files

I am new to bash script and want to create bash script that moves some days old files between source and destination as per days defined in script. When I run this script I get error find: paths ...
0
votes
1answer
150 views

Why is this variable not getting passed to awk? [duplicate]

Possible Duplicate: external variable in awk How do I pass this variable below? This doesn't work: fname=testfile.txt lsof | awk '/deleted/&&/$fname/ {print $4}' *----no output* ...
0
votes
2answers
315 views

Shell script that copies while adding a user-provided filename suffix

I'm trying to write a shell script on Solaris that copies files from one directory to another. I need it to prompt the user for a date, and add that as a suffix to the destination filenames. How do I ...
2
votes
1answer
250 views

How to set Cols and Lines for a Subprocess

I have a script that runs a series of scripts numbered 001,002,003,004... etc down to 041 right now, will be more in the future - and these scripts them selves use some cursor control to print a ...
5
votes
3answers
167 views

SSH to two addresses, use the one that connects first

I have a home computer (let’s call it franklin because that’s what I call it) that I often ssh into from my work laptop. When I’m at home, I ssh to franklin.local, and when I’m at work or anywhere ...
0
votes
1answer
582 views

difficalty to save traceroute output in shell variable?

I need to filter and store traceroute output in shell variable (array). But I am getting some unusual output. As I try to explain in following lines. My present directory is temp, having some ...
2
votes
2answers
1k views

print a file in hex using awk

I have a file name x $ cat x 1A34532112345 I wants to print in hex using awk I written a script (with help from web) fold -1 /home/cscape/Desktop/x | gawk '{ printf("%s , %X\n",$0, int($0) )}' ...
2
votes
3answers
223 views

Indent like first line

How can I indent a file such as its first line? Example: A file containing x=1+2+3+4+ 5+6+7+8 +9+10+12 should be converted to x=1+2+3+4+ 5+6+7+8 +9+10+12 I need this inside ...
5
votes
1answer
1k views

Find all folders in a directory with the same content

In Ubuntu, is there any to find duplicate folders in a directory (i. e., folders with the same content)? I think there are already some command-line tools available for finding duplicate files (such ...
1
vote
2answers
127 views

Extra % in output of awk script

I have the following script in awk that sums all columns in a file that I pipe to it: #sum_all.awk { for (i=1; i<=NF; i++) { sum[i]+= $i } } END { for (i=1; i<=NF; i++ ) { printf "%d ", ...
6
votes
3answers
7k views

Is there a way to call a command with a set time limit and kill it when that time passes? [duplicate]

Possible Duplicate: Run a command for a specified time and then abort if time exceeds I was working on a continuos integration build script when a need for such a command arose. Basically ...
0
votes
1answer
98 views

why there is random behaviuor for a background job?

going through advanced bash scripting guide example 3.3 running a loop in background, i found this : #!/bin/bash # background-loop.sh for i in 1 2 3 4 5 6 7 8 9 10 # First loop. do echo -n "$i " done ...
0
votes
1answer
420 views

How to make a scheduled task based on a file creation time?

The supercomputer I run my Analysis uses SGE to do the job management and requires each job duration not longer than 24 hours. And this feature is causing me quite a headache. Sadly, I was asked to ...
1
vote
1answer
751 views

Linux + replace STRING/WORD in file according to rule

My target is to replace any word/string/Any characters in file with new word/string according to the following rules: If numeric characters on the left side of word/string then we not replace the ...
0
votes
1answer
493 views

linux + perl + replace any WORD in file with special characters with condition

Example1 work fine when I want to replace OLD_TEXT with NEW_TEXT ( its replace also all special characters as $@^%)(_+`:; etc ..) example1 export OLD_TEXT='$$OLD_WORD$$' export ...
4
votes
3answers
3k views

In Unix speak what is the difference between a shell script and an executable?

I have seen this question on this site and this prompted me to ask this question . I want to know in Unix speak what is the difference between an executable and a shell script ?
0
votes
1answer
3k views

What is the fastest way to process line by line in bash? [duplicate]

Possible Duplicate: How to loop over the lines of a file? Let's say I cat a file and I want to run a bash command on each line and write each line as output. How can I run a bash command ...
4
votes
3answers
12k views

How to take 'password' like input in shell script? [duplicate]

Possible Duplicate: How to hide commands typed in a Linux shell? Reading passwords without showing on screen in Bash Scripts I would like to take a password as input, but I want user to ...
14
votes
4answers
5k views

Is there a JavaScript shell?

Recently I've been working with JS and I'm very enthusiastic about this language. I know that there is node.js for running JS at server side, but is there a shell that uses JS as a scripting language? ...
2
votes
2answers
1k views

Regex for phrase matching with case statement in ksh

I am trying to start or stop a service on AIX in ksh. I am trying to start to build in fool proofing for checking things like if the services is already down, etc. Here is my script #!/bin/ksh ...
3
votes
2answers
161 views

POSIX test and -a

I checked a script of mine with checkbashisms and I got the following warnings: possible bashism in check_ssl_cert line 821 (test -a/-o): if [ -n "${ALTNAMES}" -a -n "${COMMON_NAME}" ] ; then In ...
0
votes
1answer
160 views

linux/solaris + manipulation of Standard Output

I run the following line on linux/solaris machine ( all output will write in to /tmp/Log from application.bin ) ./application.bin 1>>/tmp/Log We can see the content of the /tmp/Log file ...
6
votes
4answers
7k views

How can I assign an initial/default password to a user in Linux?

I found a guide that explains how to set a user's password. I'm trying to automate it and send an e-mail to the user like: userid created with password XYZ. request to change the initial password. ...
1
vote
1answer
1k views

connect to a remote server through ssh [duplicate]

Possible Duplicate: How do I execute a remote shell script over SSH and be prompted for passwords by commands that require it in that script? I want to connect to a remote server through ...
3
votes
3answers
646 views

Script matching literal pattern over multiple lines?

I have a multi-line string in the variable $PAT. $PAT must be searched for within the file $FILE. If $PAT is in $FILE, it needs to print the file with $PAT removed. If $PAT is not found, then print ...
2
votes
1answer
206 views

Difference between 3 commands which are used to execute shell script? [duplicate]

Possible Duplicate: Different ways to execute a shell script What are the specific differences between the commands listed below? ./<scriptname> . <scriptname> bash ...
3
votes
2answers
1k views

Why can't I kill a timeout called from a Bash script with a keystroke?

[Edit: This looks similar to some other questions asking how to kill all spawned processes – the answers all seem to be to use pkill. So the core of my question may be: Is there a way to propagate ...
8
votes
4answers
27k views

Appending current date to filename

I'm trying to append the current date to the end of a file name like this: TheFile.log.2012-02-11 Here is what I have so far: set today = 'date +%Y' mkdir -p The_Logs & find . -name The_Logs ...
1
vote
2answers
13k views

Shell script to increment count of entries

I want a script which increments the count when the script runs. Basically I want to send an email notification when I find 10 devices down from the same country and scripts run after every down ...
-1
votes
1answer
124 views

Counters in shell

I am looking for a shell script where counter needs to be set for input paramter and do action once the count reaches to 5. The problem is there could be n number of input parameter and action should ...
1
vote
2answers
909 views

bash scripting - Any function to escape character?

I am trying to automate some of my stuff and facing a issue, the problem boils down to escaping the value that is being passed as a argument to the script. myScript.sh #!/bin/bash loadPatch -name ...
2
votes
1answer
612 views

Can i update my commands( like awk,sed) to the latest release in solaris?

bash-3.00# awk '{print NR}' f1.txt 1 2 3 4 but FNR does not print anything. awk '{print FNR}' f1.txt the above line does not gives me any output,seems that the awk that i am having in my ...
18
votes
3answers
917 views

What is the difference between [[ $a == z* ]] and [ $a == z* ]?

Is there is any difference between these two. [[ $a == z* ]] and [ $a == z* ] Can I have an example where they would have different outputs? Furthermore, how does the working of [[ ]] differs ...
1
vote
1answer
313 views

Linux + Solaris how to verify the last execute process from list of process

I need advice: How to verify which is the last scan_sys.sh process that run in my linux or solaris ? my target is to kill all scan_sys.sh process , except the latest scan_sys.sh ( the last execute ...
6
votes
3answers
4k views

Diff, show modified line from right file only

I have file a and b and I would like to output lines of b that changed since it was cloned from a. Just the modified lines, no surrounding context, no diff offset marks. How can I do that using shell ...
1
vote
3answers
4k views

Print lines where first field has only four characters using regex in awk?

John Goldenrod:(916) 348-4278:250:100:175 Chet Main:(510) 548-5258:50:95:135 Tom Savage:(408) 926-3456:250:168:200 Elizabeth Stachelin:(916) 440-1763:175:75:300 output should contain the lines ...
11
votes
6answers
49k views

How can I monitor all outgoing requests/connections from my machine?

My machine is a server so I want to ignore connections being made to my server (e.g. when someone visits my website). I want to see only connections/requests being made by my server to other places. ...
5
votes
1answer
381 views

Batch conversion of Module files with XMP

I have the following script to convert a big bunch of .MOD and .XM files into Wave format: #!/bin/bash for f in ./XM.* ./MOD.* do xmp $f -d wav -o - | ffmpeg -i - -acodec libmp3lame -ab 320k ...