Difference between revisions of "Late booting of machine due to sendmail/sm-client services"
m |
m |
||
| (3 intermediate revisions by the same user not shown) | |||
| Line 1: | Line 1: | ||
[[Main Page|Home]] > [[CentOS]] > [[CentOS 6.x]] > [[System troubleshooting]] > [[Late booting of machine due to sendmail/sm-client services]] | |||
Sometime Linux machines may take long time to boot due to sendmail / sm-client services which take lot of time to start during machine boot. This may happen because sendmail and sm-client are not able to resolve hostname to IP addresses. Hence we should check file '<tt>/etc/hosts</tt>' and verify that it contains mapping from both '<tt>127.0.0.1</tt>' and '<tt>::1</tt>' to hostname. '''Also this mapping should be in first non-commented line of /etc/hosts file. Doing this mapping on second or third line wont help'''. | Sometime Linux machines may take long time to boot due to sendmail / sm-client services which take lot of time to start during machine boot. This may happen because sendmail and sm-client are not able to resolve hostname to IP addresses. Hence we should check file '<tt>/etc/hosts</tt>' and verify that it contains mapping from both '<tt>127.0.0.1</tt>' and '<tt>::1</tt>' to hostname. '''Also this mapping should be in first non-commented line of /etc/hosts file. Doing this mapping on second or third line wont help'''. | ||
| Line 7: | Line 6: | ||
We should also let aliases localhost and localhost.localdomain remain in /etc/hosts file. If we remove their entries then too some system programs may stop working properly. | We should also let aliases localhost and localhost.localdomain remain in /etc/hosts file. If we remove their entries then too some system programs may stop working properly. | ||
[[Main Page|Home]] > [[CentOS]] > [[CentOS 6.x]] > [[System troubleshooting]] > [[Late booting of machine due to sendmail/sm-client services]] | |||
Latest revision as of 11:37, 28 July 2022
Home > CentOS > CentOS 6.x > System troubleshooting > Late booting of machine due to sendmail/sm-client services
Sometime Linux machines may take long time to boot due to sendmail / sm-client services which take lot of time to start during machine boot. This may happen because sendmail and sm-client are not able to resolve hostname to IP addresses. Hence we should check file '/etc/hosts' and verify that it contains mapping from both '127.0.0.1' and '::1' to hostname. Also this mapping should be in first non-commented line of /etc/hosts file. Doing this mapping on second or third line wont help.
This means that we should be careful when we change hostname by using 'hostname' command or by modifying '/etc/sysconfig/network' file. We should also correspondingly modify '/etc/hosts' whenever we change system name.
We should also let aliases localhost and localhost.localdomain remain in /etc/hosts file. If we remove their entries then too some system programs may stop working properly.
Home > CentOS > CentOS 6.x > System troubleshooting > Late booting of machine due to sendmail/sm-client services
