Shell record time

Shell has two built-in variables about time,
You have never used it,
I have never used it,
Today is also the first time to see,
So I added a note,
For future reference.

$
Seconds: the time when the script has been run.
(
In seconds)
.

$
Tmout
If
Tmout
The environment variable is set to a non-zero time value,
After the specified time,
The shell prompt times out,
This will cause a logout.


ZJ @
ZJ
:
~
/
Script/
Cushell/
08.
11.
15 $
Cat time
.
Sh
#! /Bin/bash


While
(
(
1)
)

Do

Sleep
1
Echo "this pro run $ seconds"
"S"

if
[
[
$
SECONDS
-
eq
10 ]
]
;
then
exit
0
fi
done
zj@
zj
:
~
/
Script/
cushell/
08.
11.
15$
.
/
time
.
sh
This pro run 1s
This pro run 2s
This pro run 3s
^C

zj@
zj
:
~
/
Script/
cushell/
08.
11.
15$
cat time_out.
sh
#!/bin/bash


TMOUT=
3

Echo "Hello what? "

Echo "only $ tmout seconds to answer! "

Read
-
S name
Echo $
Name

Read-
T almost