cloud engineer
by Ulysses
Core dumps are triggered by kernel when a program crashses. It saves memory to a file.
How to enable core dumps.
ulimit -S -c unlimited |
ulimit -S -c unlimited
Enable core dumps permanently. Edit /etc/security/limits.conf. Add the following.
* soft core unlimited |
* soft core unlimited
Disable core dumps.
ulimit -S -c 0 |
ulimit -S -c 0
Disable core dumps permanently. Edit /etc/security/limits.conf. Add the following.
* soft core 0 * hard core 0 |
* soft core 0 * hard core 0
by Ulysses
How to enable and disable CloudWatch alarms
$ aws cloudwatch disable-alarm-actions --alarm-names myalarm --region us-east-1 $ aws cloudwatch enable-alarm-actions --alarm-names myalarm --region us-east-1 |
$ aws cloudwatch disable-alarm-actions --alarm-names myalarm --region us-east-1 $ aws cloudwatch enable-alarm-actions --alarm-names myalarm --region us-east-1
by Ulysses
Here’s the process to restore Winbind.
Restore old config.
cp /etc/sssd/sssd.conf-xxxxxxx /etc/sssd/sssd.conf cp /etc/krb5.conf-xxxxxxx /etc/krb5.conf |
cp /etc/sssd/sssd.conf-xxxxxxx /etc/sssd/sssd.conf cp /etc/krb5.conf-xxxxxxx /etc/krb5.conf
Disable SSSD. Authconfig creates /etc/nswitch.conf.
authconfig --disablesssd --disablesssdauth --updateall |
authconfig --disablesssd --disablesssdauth --updateall
Start Winbind.
service winbind start; service smb start; service nmb start |
service winbind start; service smb start; service nmb start