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How do you add swap to an EC2 instance?
...', bs means 'block size' and count is the number of blocks you want to allocate… you can read the man page of the command for more info: linux.die.net/man/1/dd
– Fábio Batista
May 19 '14 at 22:23
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How do I view the SQLite database on an Android device? [duplicate]
... on devices that are not rooted.
Connect your device and launch the application in debug mode.
You may want to use adb -d shell "run-as com.yourpackge.name ls /data/data/com.yourpackge.name/databases/" to see what the database filename is.
Notice: com.yourpackge.name is your application package ...
How to replace an entire line in a text file by line number
...script and had no problems:
#Create temporary file with new line in place
cat /dir/file | sed -e "s/the_original_line/the_new_line/" > /dir/temp_file
#Copy the new file over the original file
mv /dir/temp_file /dir/file
This doesn't go by line number, but you can easily switch to a line number...
How can I measure the actual memory usage of an application or process?
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With ps or similar tools you will only get the amount of memory pages allocated by that process. This number is correct, but:
does not reflect the actual amount of memory used by the application, only the amount of memory reserved for it
can be misleading if pages are shared, for example by sever...
How to import load a .sql or .csv file into SQLite?
...
Try doing it from the command like:
cat dump.sql | sqlite3 database.db
This will obviously only work with SQL statements in dump.sql. I'm not sure how to import a CSV.
share
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Java inner class and static nested class
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From the Java Tutorial:
Nested classes are divided into two categories: static and non-static. Nested classes that are declared static are simply called static nested classes. Non-static nested classes are called inner classes.
Static nested classes are accessed using the enclosing...
How to save and load cookies using Python + Selenium WebDriver
...wer by @Eduard Florinescu but with newer code and missing import added:
$ cat work-auth.py
#!/usr/bin/python3
# Setup:
# sudo apt-get install chromium-chromedriver
# sudo -H python3 -m pip install selenium
import time
from selenium import webdriver
from selenium.webdriver.chrome.options import O...
How to set the context path of a web application in Tomcat 7.0
... ROOT but this is a terrible way to do it, IMHO. Now I checked out the tomcat doc & it says
13 Answers
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gitignore without binary files
... update your .gitignore with the following command which also removes duplicates and keeps alphabetic ordering intact.
T=$(mktemp); (cat .gitignore; find . -executable -type f | sed -e 's%^\./%%') | sort | uniq >$T; mv $T .gitignore
Note, that you cannot pipe output directly to .gitignore, bec...
How to compile and run C/C++ in a Unix console/Mac terminal?
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All application execution in a Unix (Linux, Mac OS X, AIX, etc.) environment depends on the executable search path.
You can display this path in the terminal with this command:
echo $PATH
On Mac OS X (by default) this will di...