If you have multiple CSV files with the same format and you want to combine them to just a single file, just do
cat file1.csv file2.csv > output.csv
cat *.csv > output.csv
To count lines of one or many files on the shell I use wc (Wordcount). If you want to count all lines of all CSV files in a directory, just type:
wc -l *.csv
There are two things to increase the security for ssh logins.
sudo nano /etc/ssh/sshd_config and change the line Port 22 to something higher. Make sure to stay below 65,000 and don’t use any port which is already used by another service like 80 (web). After changing and saving the file, simply restart the ssh daemon and reload the configuration with sudo /etc/init.d/ssh reload. Done.
# Open the sshd config file
sudo nano /etc/ssh/sshd_config
ChallengeResponseAuthentication no
RSAAuthentication yes
PubkeyAuthentication yes
/etc/init.d/sshd restart
While transforming this page to Jekyll I needed a sitemap.xml for the Google Webmaster Tools. A quick search showed up this result. Works perfectly.
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layout: null
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For serialization and deserialization in the .NET framework, I use the Newtonsoft JSON Serializer. This library works really fast and is very flexible. Lately I had a problem that I wanted to serialize a List<ObjA> with ObjB and ObjC. ObjB and ObjC are children of ObjA. In the code it looks as the following:
public class ObjA
{}
public class ObjB : ObjA
{}
public class ObjC : ObjA
{}
public class Program
{
public void main()
{
List<ObjA> objectList = new List<ObjA>();
string serializedObjects = JsonConvert.SerializeObject(objectList);
List<ObjA> objectListNew = JsonConvert.DeserializeObject<List<ObjA>>(serializedObjects);
}
}
SerializeObject() and later deserialized it with the method DeserializeObject<>(), all the objects were of the type ObjA instead of type ObjB or ObjC. After a short research, I found the solution:
public class Program
{
public void main()
{
List<ObjA> objectList = new List<ObjA>();
string serializedObjects = JsonConvert.SerializeObject(objectList, Formatting.Indented, new JsonSerializerSettings()
{
ReferenceLoopHandling = ReferenceLoopHandling.Ignore,
TypeNameHandling = TypeNameHandling.All
});
List<ObjA> objectListNew = JsonConvert.DeserializeObject<List<ObjA>>(serializedObjects, new JsonSerializerSettings() {TypeNameHandling = TypeNameHandling.Auto});
}
}