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How to write into a file in PHP?
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Consider fwrite():
<?php
$fp = fopen('lidn.txt', 'w');
fwrite($fp, 'Cats chase mice');
fclose($fp);
?>
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How to find out what group a given user has?
... format.
sh collection.sh
#!/bin/bash
HOSTNAME=`hostname -s`
for i in `cat /etc/passwd| grep -vE "nologin|shutd|hal|sync|root|false"|awk -F':' '{print$1}' | sed 's/[[:space:]]/,/g'`; do groups $i; done|sed s/\:/\,/g|tr -d ' '|sed -e "s/^/$HOSTNAME,/"> /tmp/"$HOSTNAME"_inventory.txt
sudo cat ...
Hidden features of C
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A big negative is that GCC does not have a flag to catch signed integer overflows and throw a runtime exception. While there are x86 flags for detecting such cases, GCC does not utilize them. Having such a flag would allow non-performance-critical (especially legacy) applic...
Label encoding across multiple columns in scikit-learn
... return self.fit(X,y).transform(X)
Suppose we want to encode our two categorical attributes (fruit and color), while leaving the numeric attribute weight alone. We could do this as follows:
MultiColumnLabelEncoder(columns = ['fruit','color']).fit_transform(fruit_data)
Which transforms our ...
Verify a certificate chain using openssl verify
I'm building a own certificate chain with following componenents:
7 Answers
7
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Using variables inside a bash heredoc
...s.
In your second example, the shell invokes sudo only with the parameter cat, and the redirection applies to the output of sudo cat as the original user. It'll work if you try:
sudo sh -c "cat > /path/to/outfile" <<EOT
my text...
EOT
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Save modifications in place with awk
...nges to file, similar to sed where I would use -i option to save modifications to a file.
8 Answers
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Is there a “goto” statement in bash?
...nlike most of the methods described above).
#!/bin/bash
echo "Run this"
cat >/dev/null <<GOTO_1
echo "Don't run this"
GOTO_1
echo "Also run this"
cat >/dev/null <<GOTO_2
echo "Don't run this either"
GOTO_2
echo "Yet more code I want to run"
To put your script back to no...
What is
...extends Comparable<? super T>>, it's when you have something like Cat extends Animal implements Comparable<Animal>.
Look at the signature of Collections.sort
public static <T extends Comparable<? super T>> void sort(List<T> list)
Therefore, with a List<Cat> li...
(13: Permission denied) while connecting to upstream:[nginx]
...twork_connect 1
Details
I checked for errors in the SELinux logs:
sudo cat /var/log/audit/audit.log | grep nginx | grep denied
And found that running the following commands fixed my issue:
sudo cat /var/log/audit/audit.log | grep nginx | grep denied | audit2allow -M mynginx
sudo semodule -i m...