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How do I force detach Screen from another SSH session?
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As Jose answered, screen -d -r should do the trick. This is a combination of two commands, as taken from the man page.
screen -d detaches the already-running screen session, and screen -r reattaches the existing session. By running screen -d -r, you force screen to detach it and then r...
How to open a file using the open with statement
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Python allows putting multiple open() statements in a single with. You comma-separate them. Your code would then be:
def filter(txt, oldfile, newfile):
'''\
Read a list of names from a file line by line into an output file.
If a line begins with a particular name, insert a string ...
How to RSYNC a single file?
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edited Aug 24 at 9:00
Community♦
111 silver badge
answered Feb 15 '13 at 4:36
Michael PlaceMichael...
argparse store false if unspecified
...fault value of False.
Likewise, store_false will default to True when the command-line argument is not present.
The source for this behavior is succinct and clear: http://hg.python.org/cpython/file/2.7/Lib/argparse.py#l861
The argparse docs aren't clear on the subject, so I'll update them now: h...
“unary operator expected” error in Bash if condition
...to use bash, it's much easier to always use the double bracket conditional compound command [[ ... ]], instead of the Posix-compatible single bracket version [ ... ]. Inside a [[ ... ]] compound, word-splitting and pathname expansion are not applied to words, so you can rely on
if [[ $aug1 == "and...
Select rows which are not present in other table
....ip
WHERE i.ip IS NULL;
EXCEPT
Short. Not as easily integrated in more complex queries.
SELECT ip
FROM login_log
EXCEPT ALL -- "ALL" keeps duplicates and makes it faster
SELECT ip
FROM ip_location;
Note that (per documentation):
duplicates are eliminated unless EXCEPT ALL is used.
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How to Convert all strings in List to lower case using LINQ?
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48
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How do I select the parent form based on which submit button is clicked?
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65
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Linq order by boolean
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Correct, false (0) comes before true (1) in ascending (default) sorting order.
– silkfire
Apr 9 '17 at 23:13
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How does “make” app know default target to build if no target is specified?
Most linux apps are compiled with:
3 Answers
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