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Why is printing to stdout so slow? Can it be sped up?
...ring, it also 0.05s here for 100,000 lines.
However, with the above modifications to write unbuffered, it takes 40 seconds to write only 1,000 lines to disk. I gave up waiting for 100,000 lines to write, but extrapolating from the previous, it would take over an hour.
That puts the terminal's 11 s...
Viewing full output of PS command
...wing options will cause (or force) long lines to wrap instead of being truncated.
ps aux | less -+S
ps aux | most -w
If you use either of the following commands, lines won't be wrapped but you can use your arrow keys or other movement keys to scroll left and right.
ps aux | less -S # use arr...
How to test an Internet connection with bash?
...onection
for interface in $(ls /sys/class/net/ | grep -v lo);
do
if [[ $(cat /sys/class/net/$interface/carrier) = 1 ]]; then OnLine=1; fi
done
if ! [ $OnLine ]; then echo "Not Online" > /dev/stderr; exit; fi
Note for those new to bash: The final 'if' statement tests if NOT [!] online and exits...
How to get Erlang's release version number from a shell?
.../erl
$ cd /usr/bin
$ ls -l erl
../lib/erlang/bin/erl
$ cd ../lib/erlang/
$ cat releases/17/OTP_RELEASE
17.3
EDIT
# Some versions seem to have OTP_VERSION instead of OTP_RELEASE
$ cat releases/17/OTP_VERSION
17.4
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Exception handling in R [closed]
...iscontinued, but you can try
Github search as e.g. in this query for tryCatch in language=R;
Ohloh/Blackduck Code search eg this query for tryCatch in R files
the Debian code search engine on top of the whole Debian archive
Just for the record, there is also try but tryCatch may be preferable....
Why aren't Java Collections remove methods generic?
... pass in to remove(); it only requires that they be equal. From the specification of remove(), remove(o) removes the object e such that (o==null ? e==null : o.equals(e)) is true. Note that there is nothing requiring o and e to be the same type. This follows from the fact that the equals() method tak...
How do I trim whitespace from a string?
...ip()
'Hello'
>>> ' Hello'.strip()
'Hello'
>>> 'Bob has a cat'.strip()
'Bob has a cat'
>>> ' Hello '.strip() # ALL consecutive spaces at both ends removed
'Hello'
If you need only to remove one space however, you could do it with:
def strip_one_space(s):
if s.en...
Where does PostgreSQL store the database?
...v 23 '11 at 4:53
Mike Sherrill 'Cat Recall'Mike Sherrill 'Cat Recall'
78.4k1616 gold badges103103 silver badges156156 bronze badges
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Sending a mail from a linux shell script
...command.
For instance, to send the content of a file, you can do this:
$ cat /path/to/file | mail -s "your subject" your@email.com
man mail for more details.
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What's the difference between “groups” and “captures” in .NET regular expressions?
... will hold {S}, i.e. only the last matching group. However, and here's the catch, if you want to find the other two catches, they're in Captures, which contains all intermediary captures for {Q} {R} and {S}.
If you ever wondered how you could get from the multiple-capture, which only shows last mat...