Linux Ask! is a Q & A web site specific for Linux related questions. Questions are collected, answered and audited by experienced Linux users.
How to echo string to standard error (stderr)?
Answer:
To echo string to the standard error (stderr), rather than the standard output (stdout), you can define the following function in your shell (put in your ~/.bashrc file)
# function echo2() { echo "$@" 1>&2; }
Then you can execute the command like:
# echo2 test
Simple for loop in Bash shell
Answer:
A simple for loop in Bash shell would like the following. You can use it wisely to skip a lot of repetitive tasks.
#!/bin/bash
for i in {1..10}
do
echo "I am command No. $i"
done
Printing the exclamation mark using echo
Answer:
You might observed a problem when you try to print the exclamation mark (!) using the echo command
E.g.
# echo "test!"
-bash: !": event not foundTo solve it, you can use single quote instead
# echo 'test!'
test!Swap last two words in Bash
Answer:
Previous article we mentioned how to swap the last two characters in Bash, now we let you know how to Swap the last two words in Bash
Solution:
# foo bar
[Esc + t]That's simple, isn't?
Remove the whole line when typing a command in Bash
Answer:
When you are typing a command in Bash shell, , to quickly remove the whole line, press "Ctrl + u" or "Ctrl + c"
This trick is very handy and should be known by all Bash users.
You might also want to read:
