In the process of our development, we often encounter situations where scheduled tasks are not executed as expected. In the Linux system, timing tasks are generally implemented by the system Crontab. This article discusses how to judge whether the Crontab is running normally.
The main solution is how to configure `docker` security in the environment where `selinux` is turned on, as well as common error solutions. It is not blindly `chmod -R 777`,`--privileged=true`,`setenforce 0` , But focus on using the `selinux` security strategy
System administrators usually only care about the security update part of the system when upgrading the system, and the upgrade of pure software version does not need to be rooted, because upgrading them may cause unpredictable problems. We only install the security update part of the system update.
In general, the IP of our Ping server is only the delay obtained by the ICMP protocol transmission, and some IDCs will optimize the ICMP delay very well. In fact, it is exposed by testing with TCPing.
These versions have different characteristics and play different roles in different application fields, so they cannot be generalized. And most VPS only provide release versions maintained by the open source community
Have you encountered using yum to install software as slow as a turtle? The default system uses centos mirror source, we can modify it to accelerate the domestic mirror source
Suppose you have a file that needs to be removed from the server, or you want to put it on the server. It would be a bit redundant to set up some form of FTP client, or configure a share to handle this small task