Step to rebuild crontab file of zimbra user

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3. Step to rebuild crontab file of zimbra user

Step to rebuild crontab file of zimbra user

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Problem

• Default crontab of zimbra user removed accidentally.
• System admin removed some entries from the crontab file.

Solution

Steps to restore or rebuild crontab entries for the zimbra user on different ZCS environments.

(A) Steps for single-server setup:

First we have to take backup of current crontab file, then we will use following commands to rebuild crontab for zimbra user.

On ZCS v8.6:

cp -pvr /var/spool/cron/zimbra  /tmp/zimbra.cron.BAK  
cat /opt/zimbra/zimbramon/crontabs/crontab > /tmp/cron.zimbra
cat /opt/zimbra/zimbramon/crontabs/crontab.ldap >> /tmp/cron.zimbra
cat /opt/zimbra/zimbramon/crontabs/crontab.store >> /tmp/cron.zimbra
cat /opt/zimbra/zimbramon/crontabs/crontab.logger >> /tmp/cron.zimbra
cat /opt/zimbra/zimbramon/crontabs/crontab.mta >> /tmp/cron.zimbra
echo "# ZIMBRAEND -- DO NOT EDIT ANYTHING BETWEEN THIS LINE AND ZIMBRASTART" >> /tmp/cron.zimbra 
crontab -u zimbra /tmp/cron.zimbra   
su - zimbra -c "zmschedulebackup -D" 

On ZCS v8.7.x and Above:

cp -pvr /var/spool/cron/zimbra  /tmp/zimbra.cron.BAK  
cat /opt/zimbra/conf/crontabs/crontab > /tmp/cron.zimbra
cat /opt/zimbra/conf/crontabs/crontab.ldap >> /tmp/cron.zimbra
cat /opt/zimbra/conf/crontabs/crontab.store >> /tmp/cron.zimbra
cat /opt/zimbra/conf/crontabs/crontab.logger >> /tmp/cron.zimbra
cat /opt/zimbra/conf/crontabs/crontab.mta >> /tmp/cron.zimbra
echo "# ZIMBRAEND -- DO NOT EDIT ANYTHING BETWEEN THIS LINE AND ZIMBRASTART" >> /tmp/cron.zimbra 
crontab -u zimbra /tmp/cron.zimbra   
su - zimbra -c "zmschedulebackup -D"

(B) Steps for multi-server setup:

Here we have mentioned the commands according to the role of ZCS server.

On ZCS v8.6:

LDAP Server:

cp -pvr /var/spool/cron/zimbra  /tmp/zimbra.cron.BAK 
cat /opt/zimbra/zimbramon/crontabs/crontab > /tmp/cron.zimbra
cat /opt/zimbra/zimbramon/crontabs/crontab.ldap >> /tmp/cron.zimbra  
echo "# ZIMBRAEND -- DO NOT EDIT ANYTHING BETWEEN THIS LINE AND ZIMBRASTART" >> /tmp/cron.zimbra  
crontab -u zimbra /tmp/cron.zimbra   
su - zimbra -c "zmschedulebackup -D" 

Mailbox Server:

cp -pvr /var/spool/cron/zimbra  /tmp/zimbra.cron.BAK 
cat /opt/zimbra/zimbramon/crontabs/crontab > /tmp/cron.zimbra
cat /opt/zimbra/zimbramon/crontabs/crontab.store >> /tmp/cron.zimbra
echo "# ZIMBRAEND -- DO NOT EDIT ANYTHING BETWEEN THIS LINE AND ZIMBRASTART" >> /tmp/cron.zimbra  
crontab -u zimbra /tmp/cron.zimbra   
su - zimbra -c "zmschedulebackup -D" 
/etc/init.d/crond restart

MTA+Proxy Server:

cp -pvr /var/spool/cron/zimbra  /tmp/zimbra.cron.BAK  
cat /opt/zimbra/zimbramon/crontabs/crontab > /tmp/cron.zimbra
cat /opt/zimbra/zimbramon/crontabs/crontab.mta >> /tmp/cron.zimbra
echo "# ZIMBRAEND -- DO NOT EDIT ANYTHING BETWEEN THIS LINE AND ZIMBRASTART" >> /tmp/cron.zimbra 
crontab -u zimbra /tmp/cron.zimbra   

On ZCS v8.7.x and Above:

LDAP Server:

cp -pvr /var/spool/cron/zimbra  /tmp/zimbra.cron.BAK 
cat /opt/zimbra/conf/crontabs/crontab > /tmp/cron.zimbra
cat /opt/zimbra/conf/crontabs/crontab.ldap >> /tmp/cron.zimbra  
echo "# ZIMBRAEND -- DO NOT EDIT ANYTHING BETWEEN THIS LINE AND ZIMBRASTART" >> /tmp/cron.zimbra  
crontab -u zimbra /tmp/cron.zimbra   
su - zimbra -c "zmschedulebackup -D" 

Mailbox Server:

cp -pvr /var/spool/cron/zimbra  /tmp/zimbra.cron.BAK 
cat /opt/zimbra/conf/crontabs/crontab > /tmp/cron.zimbra
cat /opt/zimbra/conf/crontabs/crontab.store >> /tmp/cron.zimbra
echo "# ZIMBRAEND -- DO NOT EDIT ANYTHING BETWEEN THIS LINE AND ZIMBRASTART" >> /tmp/cron.zimbra  
crontab -u zimbra /tmp/cron.zimbra   
su - zimbra -c "zmschedulebackup -D" 

MTA+Proxy Server:

cp -pvr /var/spool/cron/zimbra  /tmp/zimbra.cron.BAK  
cat /opt/zimbra/conf/crontabs/crontab > /tmp/cron.zimbra
cat /opt/zimbra/conf/crontabs/crontab.mta >> /tmp/cron.zimbra
echo "# ZIMBRAEND -- DO NOT EDIT ANYTHING BETWEEN THIS LINE AND ZIMBRASTART" >> /tmp/cron.zimbra 
crontab -u zimbra /tmp/cron.zimbra   

Note : We have to restart Cron service after installing new crontab file.

Commands to restart Cron service on different OS versions.

Ubuntu 12.04/14.04/16.04

service cron restart

RHEL/CentOS 7.x

systemctl restart crond

RHEL/CentOS 6.x

service crond restart

Submitted by: Heera Singh Koranga