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Full Discussion: Statement returning error only launching the sh script via crontab
Top Forums Shell Programming and Scripting Statement returning error only launching the sh script via crontab Post 303031422 by bakunin on Thursday 28th of February 2019 05:51:45 AM
Old 02-28-2019
Quote:
Originally Posted by mfran2002
in anycase I don't find .profile but only .bash_profile:
This is probably the relevant file.

.profile should be in your HOME directory and is a script which is executed every time you log on. It is executed by the login process itself.

.bashrc (or the similar .bash_profile) is also located in your HOME directory and also a script. It is executed every time a new instance of the shell starts up. The first shell is started by the login process as the last part of logging you on to the system, therefore the two configuration files are often confused. But if you, say, start a new shell in your session typing bash, then .bashrc is execute another time in this new shell, whereas .profile is not.

Also notice that there are system-wide counterparts for both of these files (in CentOS /etc/profile and /etc/bashrc IIRC) that are also executed but prior to your own files. You can override them this way but if you don't you should get a "halfways decent" default configuration at least.

All these files are bypassed by by cron because it is started by the init process, not by login. I have a file f_env for this purpose which i always use to set a standard environment for scripts. This way i never have to worry about putting scripts in the crontab because they are always (not only in cron) using their own environment and not whatever i use for me personally. So my scripts always start with something like:

Code:
#! /path/to/shell

. /usr/local/lib/shell/f_env

<rest of the code>

I hope this helps.

bakunin
 

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LEARN ABOUT REDHAT

cron

CRON(8) 						      System Manager's Manual							   CRON(8)

NAME

       cron - daemon to execute scheduled commands (Vixie Cron)

SYNOPSIS

       cron

DESCRIPTION

       Cron should be started from /etc/rc or /etc/rc.local.  It will return immediately, so you don't need to start it with '&'.

       Cron searches /var/spool/cron for crontab files which are named after accounts in /etc/passwd; crontabs found are loaded into memory.  Cron
       also searches for /etc/crontab and the files in the /etc/cron.d/ directory, which are in a different format (see  crontab(5)).	Cron  then
       wakes up every minute, examining all stored crontabs, checking each command to see if it should be run in the current minute.  When execut-
       ing commands, any output is mailed to the owner of the crontab (or to the user named in the MAILTO environment variable in the crontab,	if
       such exists).

       Additionally,  cron checks each minute to see if its spool directory's modtime (or the modtime on /etc/crontab) has changed, and if it has,
       cron will then examine the modtime on all crontabs and reload those which have changed.	Thus cron need not be restarted whenever a crontab
       file is modified.  Note that the Crontab(1) command updates the modtime of the spool directory whenever it changes a crontab.

SEE ALSO

       crontab(1), crontab(5)

AUTHOR

       Paul Vixie <paul@vix.com>

4th Berkeley Distribution					 20 December 1993							   CRON(8)
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