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write a shell script to ssh to a remote machine and execute commands
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There are multiple remote linux machines, and I need to write a shell script which will execute the same set of commands in each machine. (Including some sudo operations). How can this be done using shell scripting?
You can do this with ...
How to get execution time in rails console?
...be better to add another answer or comment with reference to the benchmark-ips gem? You've done quite a big edit to the answer there which changes it significantly and rather reduces the appropriateness of the votes on it already.
– Shadwell
Jan 2 '17 at 13:01
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How do I resolve the “java.net.BindException: Address already in use: JVM_Bind” error?
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Yes you have another process bound to the same port.
TCPView (Windows only) from Windows Sysinternals is my favorite app whenever I have a JVM_BIND error. It shows which processes are listening on which port. It also provides a convenient context menu to either kill the proc...
Why Does OAuth v2 Have Both Access and Refresh Tokens?
...ifies access token validation and makes it easier to scale and support multiple authorization servers. There is a window of time when an access token is valid, but authorization is revoked.
Indeed, in the situation where Resource Server and Authorization Server is the same entity, and where the ...
How to change the port of Tomcat from 8080 to 80?
...I use the following commands:
sudo /sbin/iptables -t nat -I PREROUTING -p tcp --dport 80 -j REDIRECT --to-port 8080
sudo /sbin/service iptables save
http://www.excelsior-usa.com/articles/tomcat-amazon-ec2-advanced.html#port80
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Websocket API to replace REST API?
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The only problem I can using TCP (WebSockets) as your main web content delivery strategy is that there is very little reading material out there about how to design your website architecture and infrastructure using TCP.
So you can't learn from other pe...
Interpolating a string into a regex
...uote or Regexp.escape if I just used single quotes on my input string: (an IP address match)
IP_REGEX = '\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}'
my_str = "192.0.89.234 blahblah text 1.2, 1.4" # get the first ssh key
# replace the ip, for demonstration
my_str.gsub!(/#{IP_REGEX}/,"192.0.2.0")
puts my_...
OceanBase使用libeasy原理源码分析：客户端 - 数据库(内核) - 清泛网 - 专...
..._t用来封装一个要发出去的请求，easy_client_t用来封装一个TCP连接的发起端，easy_hash_t是一个哈希表，easy_hash_list_t是采用开放寻址解决hash冲突的链表节点。
一、异步请求
在OceanBase 0.4 中，mergeserver请求chunkserver是异步的方式。实...
实战低成本服务器搭建千万级数据采集系统 - 更多技术 - 清泛网 - 专注C/C++...
...过各大微博的搜索api。就比如新浪微博API针对一个服务器IP的请求次数，普通权限限制是一个小时1w次，最高权限合作授权一个小时4w次。使用应用时还需要有足够的用户，单用户每个应用每小时访问1000次，最高权限4w次需要40个...
分布式系统的事务处理 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...面会讨论一下Dynamo的Vector Clock）
Two/Three Phase Commit
这个协议的缩写又叫2PC，中文叫两阶段提交。在分布式系统中，每个节点虽然可以知晓自己的操作时成功或者失败，却无法知道其他节点的操作的成功或失败。当一个事务跨越...