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Top Forums Shell Programming and Scripting Linux/bash Script only working if executed from shell prompt Post 302971796 by Don Cragun on Monday 25th of April 2016 08:13:53 PM
Old 04-25-2016
The command:
Code:
set PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin

is something that you would use in a csh script; not bash. In a bash script, that command sets the 1st positional parameter for the current shell execution environment to PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin; it does not change the value of the PATH environment variable for that script. Try changing it to:
Code:
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin

If that doesn't solve your problem, please answer the following questions:
  1. Who are you logged in as when the script succeeds when you run it from your shell?
  2. Whose crontab is the script run from when cron runs the job? What is the entry in that crontab that starts this script?
  3. What is the output from the command?: ls -ld /var/log /var/log/cronlog
  4. What is the output from the command?: type date ping service

Last edited by Don Cragun; 04-25-2016 at 09:39 PM.. Reason: Explain what set PATH=... does in bash.
 

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INITSCRIPT(5)						Linux System Administrator's Manual					     INITSCRIPT(5)

NAME
initscript - script that executes inittab commands. SYNOPSIS
/bin/sh /etc/initscript id runlevels action process DESCRIPTION
When the shell script /etc/initscript is present, init will use it to execute the commands from inittab. This script can be used to set things like ulimit and umask default values for every process. EXAMPLES
This is a sample initscript, which might be installed on your system as /etc/initscript.sample. # # initscript Executed by init(8) for every program it # wants to spawn like this: # # /bin/sh /etc/initscript <id> <level> <action> <process> # # Set umask to safe level, and enable core dumps. umask 022 ulimit -c 2097151 PATH=/bin:/sbin:/usr/bin:/usr/sbin export PATH # Increase the hard file descriptor limit for all processes # to 8192. The soft limit is still 1024, but any unprivileged # process can increase its soft limit up to the hard limit # with "ulimit -Sn xxx" (needs a 2.2.13 or later Linux kernel). ulimit -Hn 8192 # Execute the program. eval exec "$4" NOTES
This script is not meant as startup script for daemons or somesuch. It has nothing to do with a rc.local style script. It's just a handler for things executed from /etc/inittab. Experimenting with this can make your system un(re)bootable. FILES
/etc/inittab, /etc/initscript. AUTHOR
Miquel van Smoorenburg ,<miquels@cistron.nl> SEE ALSO
init(8), inittab(5). July 10, 2003 INITSCRIPT(5)
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