Latest revision as of 21:02, 6 January 2013

echo is a command to write something. By default this goes to stdout which by default goes to the console. Here is an example:

tweedleburg:~ # echo "hello world"
hello world

you can also output variables:

tweedleburg:~ # export name="Linus"
tweedleburg:~ # echo $name
Linus

for more info on this, see shell programming. As with every program that outputs text, you can redirect the output to a file like this:

tweedleburg:~ # echo "hello world" > file
tweedleburg:~ # cat file
hello world

Show all characters

To show all ascii characters you can use the following command:

for l in $(seq 0 1 7); do for i in $(seq 0 1 7); do for n in $(seq 0 1 7); do \
echo -en "\0${l}${i}${n}  "; done; done; done

echo -e "\x41"
A

@@ Line 1: / Line 1: @@
-echo is a [[command]] to write something. By default this goes to [[stdout]] which by default goes to the [[console]]. Here is an example:
+echo is a [[command]] to write something. By default this goes to [[stdout]] which by default goes to the [http://simple.wikipedia.org/wiki/Command_Line_Interface console]. Here is an example:
   tweedleburg:~ # echo "hello world"
   hello world
@@ Line 11: / Line 11: @@
   tweedleburg:~ # cat file
   hello world
+= Show all characters =
+To show all ascii characters you can use the following [[command]]:
+ for l in $(seq 0 1 7); do for i in $(seq 0 1 7); do for n in $(seq 0 1 7); do \
+ echo -en "\0${l}${i}${n}  "; done; done; done
+= Show hexadecimal characters =
+ echo -e "\x41"
+ A
+= See also =
+* [[sHell skripting tutorial]]