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How can I list ALL DNS records?
...but not below.
# try this
dig google.com any
This may return A records, TXT records, NS records, MX records, etc if the domain name is exactly "google.com". However, it will not return child records (e.g., www.google.com). More precisely, you MAY get these records if they exist. The name server d...
How to view file diff in git before commit
...
If you want to see what you haven't git added yet:
git diff myfile.txt
or if you want to see already added changes
git diff --cached myfile.txt
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How do I close a single buffer (out of many) in Vim?
... names is often more effective.
For instance, after I opened a couple of .txt file to refresh my memories of some fine point.. copy and paste a few lines of text to use as a template of sorts.. etc. I would type the following:
:bd txt <Tab>
Note that the matching string does not have to b...
How do I write output in same place on the console?
...
Python 2
I like the following:
print 'Downloading File FooFile.txt [%d%%]\r'%i,
Demo:
import time
for i in range(100):
time.sleep(0.1)
print 'Downloading File FooFile.txt [%d%%]\r'%i,
Python 3
print('Downloading File FooFile.txt [%d%%]\r'%i, end="")
Demo:
import time
f...
How to replace (or strip) an extension from a filename in Python?
...d do what you want.
import os
print os.path.splitext('/home/user/somefile.txt')[0]+'.jpg'
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What is the difference between cout, cerr, clog of iostream header in c++? When to use which one?
...put by default. Redirecting (piping) one of them (e.g. program.exe >out.txt) would not affect the other.
Generally, stdout should be used for actual program output, while all information and error messages should be printed to stderr, so that if the user redirects output to a file, information m...
How to append to a file in Node?
...alled:
Asynchronously:
const fs = require('fs');
fs.appendFile('message.txt', 'data to append', function (err) {
if (err) throw err;
console.log('Saved!');
});
Synchronously:
const fs = require('fs');
fs.appendFileSync('message.txt', 'data to append');
But if you append repeatedly to th...
How to create a file in Linux from terminal window? [closed]
... containing the output of some command.
eg: grep --help > randomtext.txt
echo "This is some text" > randomtext.txt
nano /path/to/file or vi /path/to/file (or any other editor emacs,gedit etc)
It either opens the existing one for editing or creates & opens the empty file to enter,...
How should I use git diff for long lines?
...r example, instead of getting something like this:
diff --git a/test-file.txt b/test-file.txt
index 19e6adf..eb6bb81 100644
--- a/test-file.txt
+++ b/test-file.txt
@@ -1 +1 @@
-this is a short line
+this is a slightly longer line
You might get something like this:
diff --git a/test-file.txt b/te...
Confused by python file mode “w+”
... you'd do something like this to read from your file:
with open('somefile.txt', 'w+') as f:
# Note that f has now been truncated to 0 bytes, so you'll only
# be able to read data that you write after this point
f.write('somedata\n')
f.seek(0) # Important: return to the top of the f...