You can use sleep
and clear
commands in your script as following:
for word in $(< read)
do
echo "$word"
sleep 1
clear
done
Explanation:
The sleep
command make delay for a specified amount of time (in seconds). With sleep 1
delay would be for 1 second. You can change for more time delay by incrementing the second parameter or for delaying less than 1 second divide it to low units; Like sleep .1
for 1/10 second delay or sleep .001
for 1/1000 second delay and etc.
The clear
command clear the terminal screen.
Even better you can do this through below awk
command:
awk '{i=1; while(i<=NF){ print $((i++)); system("sleep 1; clear") }}' read
Explanation:
In awk
, the NF
specifies the total number of fields in the current input record/line, so by using a variable as a counter (i
) and looping over it, we are printing all of them from 1st position to the end of them (NF
). Then by using the system("sleep 1; clear")
part, we are telling to awk
to calling the system commands to sleeping for 1 second and clearing the screen.
In above we are displaying the input file as word by word. If you are going to display it line by line add IFS=$'\n'
in the script like:
IFS=$'\n'
for word in $(< read)
do
echo "$word"
sleep 1
clear
done
And change the awk
command like:
awk '{ $0; system("sleep 1; clear") }1' read
$0
specifies the current line. and the 1
on end enables the default awk
's print command.
Meet paste
, part of the preinstalled GNU core utilities:
$ paste <(printf %s "$varA") <(printf %s "$varB")
Aug 01 04:25
Aug 04 07:28
Aug 16 03:39
Aug 26 10:06
paste
takes files and not variables as input, so I used bash
Process Substitution and just printed the variable content with printf
. The default delimiter between columns is TAB
, you can change that with the -d
option, e.g. paste -d" "
for a single space character. To learn more about paste
have a look at the online manual or run info '(coreutils) paste invocation'
.
Best Answer
should do what you want. Substitute
1 2
with the numbers or strings you need. Dependent on the values of$i
you may need to quote it like so:echo variable"$i"_case"$i"
.