Questions[echo](ubuntu)

I'm getting a curl command output as below

curl -s https://api.github.com/repos/harshavardhanc/dockerfile-ansible/pulls\?state\=all | jq -r '.[]|(.number|tostring)+" "+.user.login+" "+.created_at+" "+.merged_at'

5 test 2019-09-27T11:06:23Z 2019-09-27T11:09:28Z
4 test1 2019-09-26T16:56:40Z 2019-09-26T16:57:02Z
3 test2 2019-09-26T16:54:25Z 2019-09-26T16:54:55Z
2 test3 2019-09-26T16:52:59Z 2019-09-26T16:55:19Z
1 test4 2019-09-26T16:46:52Z 2019-09-26T16:47:25Z

and I'm storing it in a variable and trying to pass echo the variable to pass the value to another command to parse the output. But when I'm trying to echo the variable it is printing all the lines as a single line.

prlist=$(curl -s https://api.github.com/repos/harshavardhanc/dockerfile-ansible/pulls\?state\=all | jq -r '.[]|(.number|tostring)+" "+.user.login+" "+.created_at+" "+.merged_at')
echo $prlist

5 test 2019-09-27T11:06:23Z 2019-09-27T11:09:28Z 4 test1 2019-09-26T16:56:40Z 2019-09-26T16:57:02Z 3 test2 2019-09-26T16:54:25Z 2019-09-26T16:54:55Z 2 test3 2019-09-26T16:52:59Z 2019-09-26T16:55:19Z1 test4 2019-09-26T16:46:52Z 2019-09-26T16:47:25Z

How to avoid this printing in different line? Please help.

In the terminal of Ubuntu 18.04 LTS, when I write this command:

echo -e "Hello\\\n"

It gives this as the output:

Hello\n

But it should print, as the man page says:

Hello\

That is, first print Hello, then \, then a newline character (and then another newline). Where is the problem?

See these few echo -e commands and their output:

man420@man420-X542UQ:~$ echo -e "HEllo\a\a\a\a\a\a\\\n"
HEllo\n
man420@man420-X542UQ:~$ echo -e "HEllo\\\n"
HEllo\n
man420@man420-X542UQ:~$ echo -e "HEllo\a\\\n"
HEllo\n

I'm working on a Bash script and the length of the string contained in a certain variable is one of my conditions. The current string is W5u7TBTzF17GGFV8DBJHvgAAAAI. Initially I've count the string length by the help of wc -c:

$ VAR='W5u7TBTzF17GGFV8DBJHvgAAAAI'; echo "$VAR" | wc -c
28

But my script condition [[ ${#VAR} -eq 28 ]] never pass. Then I decided to count the characters on by one. Indeed the string length is 27 characters, also the value of ${#VAR} is 27:

$ echo "${#VAR}"
27

So I'm in wondering - where does this difference come from?

I have a simple echo print out that I've added to my .bashrc:

echo "$(tput setaf 2)Wake up....."
sleep 2s
reset
sleep 2s
echo "$(tput setaf 2)Wake up....."
sleep 2s
reset
echo "$(tput setaf 2)Wake up neo....."
sleep 2s
echo "$(tput setaf 2)The Matrix has you......"
sleep 2s
reset
echo "$(tput setaf 2)Follow the white rabbit......"
sleep 2s
reset
cmatrix

This prints a message to terminal, but I want it look as though it's being typed, with a consistent delay between characters.

Important: this question How to disable microphone from auto adjusting its input volume doesn't cover this scenario.

This question is about the volume auto adjust feature of pulseaudio "module-echo-cancel".

I am using the pulseaudio module module-echo-cancel, officially documented here.

You can enable it by editing /etc/pulse/default.pa and adding the line:

load-module module-echo-cancel

And reseting it with pulseaudio -k. And it works.

But the documentation doesn't inform how to disable the volume auto adjust that this module executes when it is enabled.