The Korn shell (ksh) is a shell with advanced scripting features, commonly found on commercial unices and some BSD systems but rarely used on Linux.

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Solaris 10, Shell Script, Cursor movement [closed]

#include <signal.h> #include <unistd.h> #include <stdio.h> #include <sys/types.h> #include <time.h> void prtime() { time_t rawtime; struct tm * ...
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757 views

case + how to implement equal or less or greater in case syntax

My target is to verify a range of number with (only with case + esac), and print the range. So for example: If the number is between 0 and 80, print >=0<=80 If the number is between 81 and 100 ...
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1answer
1k views

Bash vs ksh pipes

I am stuck with some problems with my scripts in ksh. FWIW the problem which I am unable to overcome is that when I use a structure such as this command | while read VAR1 do many.commands using ...
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2answers
1k views

Del key in AIX ksh over PuTTY telnet

At the place where I work we're developing under AIX with ksh and connecting to it via telnet. Most people use ArcTel to connect, while I prefer PuTTY. The only problem I have with PuTTY is that the ...
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2answers
899 views

History command in ksh not able to use [closed]

I am using the ksh shell. I am not getting any impact of these following commands. It is executing without any error but it is not giving the proper results. export HISTTIMEFORMAT='%F %T ' Use the ...
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656 views

ksh - map Ctrl-D to exit shell

I would like to know how we can map the keys Ctrl-D in ksh to exit the shell as it does in bash shell. Not much familiar with key binding in ksh. Edit My comments are after the <!-- string ...
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3answers
5k views

How to iterate through a comma-separated list and execute a command for each entry

I have been give a command which outputs a comma-separated list for autosys jobs in the variable $all_jobs: box=box-of-jobs;all_jobs=$(jobscout -box $box | egrep "^\w+" | tr '\n' ',' | sed s/.$//); ...
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619 views

Reading the contents of the file and splitting using ksh

We're using a ksh script for installing one product. I've another config file, I'd need to read this configuration file from my main script Content of the Configuration file: ...
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488 views

Comparison of shells? [closed]

Do shells have any actual advantages or disadvantages? They can all run any binary, they all support pipes and > (output to file). Why would one choose bash over sh, or sh over ksh, etc? Why does ...
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2k views

Ksh Script to ftp multiple directories simultaneously

I'm new to this site and i have this problem: I have a directory in unix with multiple directories in it. Each directory have around 5k files in it. So we are talking about 40k to 50k files. I need ...
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2k views

Pattern matching from the input arguments

we're trying to enhance the scripts. Users will pass some arguments and part of the arguments will have 5.0.3 For an example the input argument would be like Jboss5.0.3GA. Since it ( Jboss5.0.3GA ) ...
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801 views

How to find old directories in local directory using find in AIX?

I need to find all old directories in current directory. find in AIX does not provide -maxdepth parameter. There is only -depth and -prune parameters. It is possible to write something like following: ...
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531 views

Why does sendmail work differently in different shells?

The following code works when I directly run it in bash shell: SUBJECT="SUBJECT-"`date`; MAIL_FROM="abc@site.com"; MAIL_TO="abc@site.com"; MAIL_CC="abc@site.com"; MAIL_FILE="/path/of/html/body.html"; ...
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1answer
97 views

Unsure about the behaviour of my script when writing to log file

I have a very simple ksh script and at certain points I want to write to a log file. I use the following commands in two places... print "Directory listing 1:\n" > ${LogFile} ll >> ...
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730 views

How to create an alias that takes an argument in KornShell

I am trying to create an alias which when given some argument will look for the folder with contains the argument as pattern. Let the alias name be gohf. Now, I will be using this alias like gohf ...
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208 views

How do I ensure that only one instance of my ksh script runs on Solaris using NFS? [duplicate]

Possible Duplicate: What Unix commands can be used as a semaphore/lock? I have read many similar post and the solution seems to be to use flock. flock does not exist on my system and I ...
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3answers
2k views

Solaris: find the day of last Monday,Tuesday,…Sunday by means of shell script

I'm trying desperatly to find a bash or ksh routine that allows me to find for example the previous Monday,Tuesday,Wednesday,... preceding today's date. Additonal it has to work on plain vanilla ...
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3answers
8k views

How to use cut command to get the first and last elements of a row?

I've asked almost the same question already, but this time, I want to retrieve the X latest elements of a row of a CSV file. For example, with an input file as this one: 1;foo;bar;baz;x;y;z ...
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3answers
512 views

linux/solaris + verify duplicate valid IP address from file

what the best way to find duplicate IP from file ( I have ksh script in this script I need to write function that check for duplicate IP ) for example if IP - 192.1926.23.52 exists twice in file - ...
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1answer
884 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 ...
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2answers
685 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 ...
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3answers
4k views

Storing a list in a variable

I am trying to store the name of list of files that contain 781 in their name. I will be using this list to perform some operations and after that I will delete this list. I have two options to do ...
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1answer
522 views

Ksh loses data after piping 16K bytes

I recently found that ksh may lose some data after printing more than 16K bytes to the stdout if it is blocked for a couple of seconds. This test.sh script prints out 257*64 (16448) bytes: ...
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553 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 ...
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364 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 ...
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2answers
808 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 ...
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1k views

Shell - Deal with multiple command history files

Where I work, for security and auditing purpose, we have to keep one history file for each session (user, date, terminal, etc in the file name). Obviously, the HISTFILE variable, is set to read only ...
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2answers
5k views

Bash/Korn shell script edited on Windows throws error '…^M: not found'

Some background on the issue: I am new to scripting and wrote a simple Bash script in Windows using Notepad++. cxStopAllServicesOnSERVER.sh #!/usr/bin/bash cd "/some/path" echo "Hi. Logs can be ...
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4answers
1k views

A unix command to truncate each line of a file

I have a CSV file and I want to truncate it from the third semicolon. For example, if I have this file: 1;foo;bar;baz;x;y;z 2;foo;bar;baz;x;y;z 3;foo;bar;baz;x;y;z I want to get the following ...
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406 views

Korn shell timeout/kill script

I am trying to write a simple Korn shell script to execute a loading process. The process occasionally runs into connectivity issues, so I need to kill it if it runs too long. I have been trying the ...
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967 views

Problem with using grep command with env variable containing special characters

I have a variable "abc" with value "xyz*!@#" in my unix account (ksh). I used export command to export this variable into the environment. When I use grep command as below env |grep xyz I get the ...
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Skip first 3 byte of a file

I am using AIX 6.1 ksh shell I want to use one liner to do something like this cat A_FILE | skip-first-3-bytes-of-the-file I want to skip the first 3 bytes of the first line, is there a way to ...
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851 views

What does exit do in an if block in a shell script?

I have a question regarding unix shell script. Say if you do exit 1 in inner if: will it exit or will it still execute the outer if? The following is a dummy example. if [ "$PASSWORD" == ...
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Change Korn prompt to show shorter path for working directory

I have changed my .kshrc to show my prompt as follows: 511 /export/home/students/cninja $ where 511 is the command number and ../students/cninja is the current working directory. Is it possible to ...
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Executing user defined function in a find -exec call

I'm on Solaris 10 and I have tested the following with ksh (88), bash (3.00) and zsh (4.2.1). The following code doesn't yield any result: function foo { echo "Hello World" } find somedir -exec ...
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441 views

When is it useful to use “grep — SOMEPATTERN”?

So under Linux/AIX where ever.., when is it useful to use: grep -- SOMEPATTERN the Question is the "--" part. When is it usefull to use?
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print command not found

From the korn shell, I keep getting print command not found. When I run print from the shell, it says the same thing. How would I go about fixing this? printf works fine, but for some reason print is ...
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468 views

How to set the command(s) that get run before every single prompt?

I used to know this but I forgot: I want to execute a command or a couple of commands before every single prompt. When I am in our PROD box, I want a big fat reminder above every prompt that says * ...
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3answers
940 views

Timeout `idql` command in ksh

I probably read all the threads in almost all the forums for a solution to my need. I am a beginner in shell scripting and I dont have a perfect solution yet. Below is my code snippet. idql -n ...
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2answers
3k views

What are the dangers of setting a high limit to max File Descriptors per process?

I'm working on an old legacy application, and I commonly come across certain settings that no one around cam explain. Apparently at some point, some processes in the application were hitting the max ...
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2answers
1k views

Using sed to color the output from a command on solaris

I have a ksh script that must work on both linux and solaris. I'm trying to color the output of specific commands. It works on linux (specifically RHEL6), but not on solaris (SunOS 5.10). Command ...
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1answer
1k views

Do shells support recursion?

I'm trying to write recursive functions in my shell scripts. Consider the following code: function printA { if [[ "$1" = 0 ]]; then return else echo "a$(printA $(("$1" - 1)))" ...
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1answer
463 views

Which version of unix from a shell?

I recently started a new job, and was told that I need to log on (Via shell) to a particular unix system. I'm trying to figure out a few peculiarities with the system, but first I need to know what ...
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1answer
545 views

Time validation with regex

I'd like to make validation about time stamp of one of my log file. But it seems I have problem on my expression in case statement. TIME value might be something like 11:49 or 2011. And I just want ...
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665 views

How to capitalize word (i.e. first letter to upper) in KornShell

Is there a builtin way in KornShell to capitalize a word, e.g. korn -> Korn? A Bash 4 example to clarify: str='korn' echo "${str^}" If there is not a bultin way to do this in KornShell, what is the ...
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Korn Shell: End, pgup, pgdown, and delete key not working

So basically my End, Pageup/Pagedown, and Delete key are not working in ksh93. I'm running FreeBSD by the way. My arrow keys are working, and so is my home key. Those keys work when I put this in my ...
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2answers
4k views

Colored Prompt in KornShell

According to this StackOverflow post, it is possible have a colored prompt in KornShell. I have not been able to figure out how to do this. I am able to use color: echo -e "\033[34mLinux\033[00m" ...
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1answer
362 views

Ksh features incorporated into Zsh?

I have been a user of Bash for some time. I want to learn at least one other shell now, so I have been picking up the Korn Shell. However, it doesn't look like Ksh has had major updates for almost ...
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627 views

What is the difference between $* and $@?

Consider the following code: foo () { echo $* } bar () { echo $@ } foo 1 2 3 4 bar 1 2 3 4 It outputs: 1 2 3 4 1 2 3 4 I am using Ksh88, but I am interested in other common ...
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4answers
3k views

Use a variable reference “inside” another variable

I'm sure it is relatively simple, I just don't know how to do it. #!/usr/bin/ksh set `iostat` myvar=6 I want to something like echo ${$myvar} which i want interpreted as ${$myvar} -> ${6} -> value ...