I'm sure there is a quick and easy way to calculate the sum of a column of values on Unix systems (using something like awk or xargs perhaps), but writing a shell script to parse the rows line by line is the only thing that comes to mind at the moment. For example, what's the simplest way to modify the command below to compute and displ...
First and foremost I should acknowledge that I have no experience at all using Java ServerPages, but I'm positive about achieving this task if you guys help me out a bit since it doesn't seem like something difficult for a seasoned JSP programmer. Anyway the thing is, there's an actual running JSP application within a *NIX box which I s...
I've written a Korn Shell script that sets an array the following way: set -A fruits Apple Orange Banana Strawberry but when I'm trying to run it from within cron, it raises the following error: Your "cron" job on myhost /myScript.sh produced the following output: myScript.sh: -A: bad option(s) I've tried many crontab syntax vari...
Is there any way to throw errors or warnings in a korn shell script to prevent the use of unset variables ? Let's assume I have a temporary folder that I want to remove. TEMP_FILES_DIR='/app/myapp/tmp' rm -Rf $TEMP_FILE_DIR #notice the misspelling How to prevent this kind of mistakes before they actually happen? I know the script sh...
I recently ran up against a wall doing some bash shell programming where an associative array would have solved my problems. I googled about features of the Korn shell and learned that it supports associative arrays, so I installed Cygwin's pdksh (public domain korn shell). However, when trying to create an associative array in the pre...
what would be your suggestions for a good bash/ksh script template to use as a standard for all newly created scripts? I usually start (after #! line) with a commented-out header with a filename, synopsis, usage, return values, author(s), changelog and would fit into 80-char lines. all documentation lines I start with double-hash symbo...
This is a crude korn shell script that someone else wrote. I don't know much about using shell syntax and I'm not even sure if this is possible. Is there any way for me to run this file and be prompted for the date so that I don't have to manually go into the script and change it each time? For example, I wan to replace the "1/12/09" ...
Hello. I'm attempting to run the following command in Korn Shell (ksh): set -A INDEXES `db2 "describe indexes for table ${TABSCHEMA}.${TABNAME} show detail" | awk '{print $1"."$2}'` What I'm attempting to achieve is place a list of the indexes over a particular table into an array which I can later iterate through. The problem is, w...
Breadth-first list is important, here. Also, limiting the depth searched would be nice. $ find . -type d /foo /foo/subfoo /foo/subfoo/subsub /foo/subfoo/subsub/subsubsub /bar /bar/subbar $ find . -type d -depth /foo/subfoo/subsub/subsubsub /foo/subfoo/subsub /foo/subfoo /foo /bar/subbar /bar $ < what goes here? > /foo /bar /foo/subfoo...
I am running the following script: #!/bin/ksh ./clear_old ./rooms_xls.pl 2/23/09 cd doors ./doors_xls.pl 2/23/09 How can I get the date to be today's date based upon the system/server time? ...
Similar question to How to keep from duplicating path variable in csh. But I don't use csh. PATH=${SOMETHING}:${PATH} How do I remove duplicates from PATH. ...
I have a ksh script that returns a long list of values, newline separated, and I want to see only the unique/distinct values. It is possible to do this? For example, say my output is file suffixes in a directory: tar gz java gz java tar class class I want to see a list like: tar gz java class ...
I want my ksh script to have different behaviors depending on whether there is something incoming through stdin or not: (1) cat file.txt | ./script.ksh (then do "cat <&0 >./tmp.dat" and process tmp.dat) vs. (2) ./script.ksh (then process $1 which must be a readable regular file) Checking for stdin to see if it is a terminal[ -t 0...
I have a variable that stores a Unix path, for example: typeset unixpath=/foo/bar/ And I have to convert it to a DOS path using Korn shell scripting: dospath=\\foo\\bar\\ ...
I am trying to check if a symbolic link exists from korn shell script using "-h filename" command.This works good on HP boxes. Not sure what is the correct option for Linux,AIX and Solaris boxes. ...
Is it possible to find out the full path to the script that is currently executing in Korn shell? i.e. if my script is in /opt/scripts/myscript.ksh, can I programmatically inside that script discover '/opt/scripts/myscript.ksh'? Thanks, ...
I am writing a script to run under the korn shell on AIX. I'd like to use the mkdir command to create a directory. But the directory may already exist, in which case I don't want to do anything. So I want to either test to see that the directory doesn't exist, or suppress the "File exists" error that mkdir throws when it tries to create ...
In my current situation, it is not unusual for me to have several UNIX computers I connect to, as several different users depending on the situation, and to traverse through various directories on the machines doing things. I use ksh through the entire thing. I was fiddling with my prompt recently, and I was able to get it to change som...
I am trying to redirect both STDOUT/STDERR of a UNIX command and append to a log file in a korn shell. rm -rf file1 >>& logfile Will this command work in ksh or is this a typical bash command? What harm would I be causing with above command? ...
The "disown" command works in bash, but not in ksh. If I have started a process in ksh, how can I "disown" it, so I can exit my shell. (I know about nohup, but the process has already started!) ...