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How to insert a text at the beginning of a file?
...n operate on an address:
$ sed -i '1s/^/<added text> /' file
What is this magical 1s you see on every answer here? Line addressing!.
Want to add <added text> on the first 10 lines?
$ sed -i '1,10s/^/<added text> /' file
Or you can use Command Grouping:
$ { echo -n '<adde...
Can Flask have optional URL parameters?
Is it possible to directly declare a flask URL optional parameter?
11 Answers
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Best practices when running Node.js with port 80 (Ubuntu / Linode) [closed]
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Port 80
What I do on my cloud instances is I redirect port 80 to port 3000 with this command:
sudo iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 80 -j REDIRECT --to-port 3000
Then I launch my Node.js on port 3000. Requests to port 80 will get mapped to port...
How to select a node using XPath if sibling node has a specific value?
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Not sure why everybody is querying for siblings, you can also check for <bb/>-elements matching the predicate from <a/>'s predicate:
//a[bb/text() = "zz"]/cc/text()
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How do you stop MySQL on a Mac OS install?
I installed MySQL via MacPorts . What is the command I need to stop the server (I need to test how my application behave when MySQL is dead)?
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How to assign the output of a Bash command to a variable? [duplicate]
...r
pwd=$(pwd)
Notice no spaces after the equals sign.
Also as Mr. Weiss points out; you don't assign to $pwd, you assign to pwd.
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Writing string to a file on a new line every time
...my string every time I call file.write() . What's the easiest way to do this in Python?
10 Answers
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How to loop over files in directory and change path and add suffix to filename
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edited May 19 '17 at 21:20
Alan W. Smith
20.7k33 g...
Count the occurrences of DISTINCT values
I am trying to find a MySQL query that will find DISTINCT values in a particular field, count the number of occurrences of that value and then order the results by the count.
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How to remove “index.php” in codeigniter's path
...]|robots\.txt)
RewriteRule ^(.*)$ /index.php/$1 [L]
Another good version is located here:
http://snipplr.com/view/5966/codeigniter-htaccess/
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