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How to pipe stdout while keeping it on screen ? (and not to a output file)
....
echo 'ee' | tee /dev/tty | foo
Reference: The Open Group Base Specifications Issue 7
IEEE Std 1003.1, 2013 Edition, §10.1:
/dev/tty
Associated with the process group of that process, if any. It is
useful for programs or shell procedures that wish to be sure of
writing messages to...
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 frame two for loops in list comprehension python
...on asking now. Please edit your answer to add explanations and give an indication of what limitations and assumptions apply.
– Brian
Aug 13 at 17:25
add a comment
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Getting root permissions on a file inside of vi? [closed]
...utions, you will see the commercial-at symbol omitted. Depending on the location, % is a valid expression, and has the same effect as reading the % register. Nested inside another expression the shortcut is generally disallowed, however: such as in this case.
>NUL and >/dev/null redirect st...
How to get git diff with full context?
...
Got inspiration and so I added a git alias.
$ cat ~/.gitconfig | fgrep diff
df = "!git diff -U$(wc -l \"$1\" | cut -d ' ' -f 1) \"$1\""
$ git df <file>
Update:
Just found "git df" does not work sometimes, due to directory change when executing git alias....
How can I undo git reset --hard HEAD~1?
...4 file2
$ git reset --hard HEAD^
HEAD is now at 1a75c1d... added file1
$ cat file2
cat: file2: No such file or directory
$ git reflog
1a75c1d... HEAD@{0}: reset --hard HEAD^: updating HEAD
f6e5064... HEAD@{1}: commit: added file2
$ git reset --hard f6e5064
HEAD is now at f6e5064... added file2
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How do you read from stdin?
...data), "lines."
On Unix, you could test it by doing something like:
% cat countlines.py | python countlines.py
Counted 3 lines.
On Windows or DOS, you'd do:
C:\> type countlines.py | python countlines.py
Counted 3 lines.
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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 get the nvidia driver version from the command line?
...omething wrong with your PATH. You could try to find nvidia-smi like so: locate nvidia-smi
– Brendan Wood
Mar 10 '17 at 15:46
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What is a CSRF token ? What is its importance and how does it work?
I am writing an application (Django, it so happens) and I just want an idea of what actually a "CSRF token" is and how it protects the data. Is the post data not safe if you do not use CSRF tokens?
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