how to list and delete shared memory in linux?
how to list and delete shared memory in linux?
List all shared memories in your Linux Systems
> $ ipcs -m
Delete specific one
> $ ipcrm -M 0x0001869c
how to list and delete shared memory in linux?
List all shared memories in your Linux Systems
> $ ipcs -m
Delete specific one
> $ ipcrm -M 0x0001869c
Git tracks changes as commits. This makes it possible and convenient to check the code change history in a repository. However, this also has side effect. The history consumes storage and the whole repository including the current version of the code files and all the previous changes may be quite large. This is especially a…
Hyperledger Fabric is a consortium blockchain system. It’s performance is relatively good and its modular architecture enables it to be usable in many scenarios. Hyperledger Fabric itself has rich documents and samples of test networks. For beginners, deploying a new network for trying and testing still consumes quite some time. In this post, we will…
Our servers run inside our own cluster and no firewall is needed. How to totally disable firewall or iptables on Fedora 20? Fedora 20 uses FirewallD as the firewall service. To totally disable firewalld: # systemctl disable firewalld # systemctl stop firewalld Read more: How to Flush iptables on Fedora Linux How to enable iptables…
How to split a string by string in Python? For example, “a string separated by space” => [“a”, “string”, “separated”, “by”, “space”] and “a,string,separated,by,comma” => [“a”, “string”, “separated”, “by”, “comma”] Python’s string.split() standard library function, if provided a separator, will split the string by the separator, for example >>> str2 = “a,string,separated,by,,,comma” >>> str2.split(“,”) [‘a’,…
UDP has its advantages over TCP, such as being relatively lightweight and receiving one packet per read call (recvmsg), although the programmers need to handle related issues, such as packet lost and out-of-order packets delivery. This post gives information and references on how to write UDP programs in a C/Linux environment. What is UDP Check…
I would like to check whether the domain name’s IP has changed in the authoritative DNS server. The system’s configured DNS server may still cache the old IP, which is fine. The question is how to query from the authoritative DNS server the new IP? You can use dig – DNS lookup utility to query…