how to set linux date and time in commands
how to set linux date and time in commands
For example, to change date to 14 Nov 2017 11:57:00, the command would be,
$ sudo date --set "14 Nov 2017 11:57:00"
Tue Nov 14 11:57:00 HKT 2017
how to set linux date and time in commands
For example, to change date to 14 Nov 2017 11:57:00, the command would be,
$ sudo date --set "14 Nov 2017 11:57:00"
Tue Nov 14 11:57:00 HKT 2017
What is a good basic iptables config? Basic rules needed: Allow incoming TCP to 22 for SSH but blocks all others. Allow outgoing TCP/UDP connections. You may consider using the following rules as a start: for tables in iptables ip6tables ; do # Flush existing rules $tables -F # Default policy $tables -P INPUT DROP…
Understanding the literature is usually the first step to do research, which is the same for systems research on cloud computing. A reading list may help a lot to those that just start in cloud computing research. Prof. Lin Gu, my PhD supervisor, compiled a reading list for system research on cloud computing. The reading…
How to find out all files with replication factor 1 in HDFS? The hdfs dfsadmin -report shows there are blocks with replication factor 1: Missing blocks (with replication factor 1): 7 How to find them out? You can run hdfs fsck to list all files with their replication counts and grep those with replication factor…
We ever discussed fixing ports used by NFSv3 so that it can be easily exported to external networks. For NFSv4.1 or higher, things are much easier. The ports for mountd, statd, and lockd are not required in a pure NFSv4 environment. We have less ports to control or allow for connections. Only port 111 and…
RAID systems such as MegaRAID add signatures to disks to maintain the infomration on these didks. When we simply remove these disks and install them to another server, Linux on the new server may detect these RAID signature infomration and refuses to continue write to the disk. Here is one example that mkfs reports “apparently…
How to input smiley faces in iPhone? I use Emoji Free app to enable the Emoji input methods. It is quite good and enables inputing of many nice smiley faces and icons. The app from App Store:Â Emoji Free app. Read more: Changing iPhone Holiday Calendar to Your Local One How to Play YouTube Video in…