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Environment variable substitution in sed
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Your two examples look identical, which makes problems hard to diagnose. Potential problems:
You may need double quotes, as in sed 's/xxx/'"$PWD"'/'
$PWD may contain a slash, in which case you need to find a character not contained in $PWD to use as a delimiter.
To nail both issues at ...
Matplotlib (pyplot) savefig outputs blank image
I am trying to save plots I make using matplotlib; however, the images are saving blank.
5 Answers
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How to display line numbers in 'less' (GNU)
...-LINE-NUMBERS
Causes a line number to be displayed at the beginning of each
line in the display.
You can also toggle line numbers without quitting less by typing -N.
It is possible to toggle any of less's command line options in this way.
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How can I list all the deleted files in a Git repository?
I know Git stores information of when files get deleted and I am able to check individual commits to see which files have been removed, but is there a command that would generate a list of every deleted file across a repository's lifespan?
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How do I make a UITableViewCell appear disabled?
I know about UITableview: How to Disable Selection for Some Rows but Not Others and cell.selectionStyle = UITableViewCellSelectionStyleNone , but how do I make a cell (or any UIView for that matter) appear disabled (grayed-out) like below?
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.NET String.Format() to add commas in thousands place for a number
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String.Format("{0:n}", 1234); // Output: 1,234.00
String.Format("{0:n0}", 9876); // No digits after the decimal point. Output: 9,876
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How to execute mongo commands through shell scripts?
...the --eval flag, if it is just a single command.
mongo --eval "printjson(db.serverStatus())"
Please note: if you are using Mongo operators, starting with a $ sign, you'll want to surround the eval argument in single quotes to keep the shell from evaluating the operator as an environment variable:...
Event system in Python
... Python do you use? I'm already aware of pydispatcher , but I was wondering what else can be found, or is commonly used?
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Copying files from Docker container to host
I'm thinking of using Docker to build my dependencies on a Continuous Integration (CI) server, so that I don't have to install all the runtimes and libraries on the agents themselves.
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How do I remove all non alphanumeric characters from a string except dash?
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