What !! means while calling echo
0
Could somebody explain this output?
$ echo !
!
$ echo !!
echo echo !
echo !
$
I expected sedond echo to write only !!
command-line echo
asked 4 hours ago
SanyaSanya
12
add a comment |
0
Could somebody explain this output?
$ echo !
!
$ echo !!
echo echo !
echo !
$
I expected sedond echo to write only !!
command-line echo
asked 4 hours ago
SanyaSanya
12
If you view your commandhistory& decide you want to run command 419 in that history, you can type!419and it'll execute. Provided answers tell you!!executes your last command, but it has other uses too :)
– guiverc
4 hours ago
Same question, although different context: askubuntu.com/q/627781/295286 Effectively duplicate
– Sergiy Kolodyazhnyy
3 hours ago
To prevent the!!from being evaluated (it's being evaluated prior to executing the echo cmd), use quotes, egecho '!!'gnu.org/software/bash/manual/html_node/Quoting.html
– michael
3 hours ago
add a comment |
0
0
0
Could somebody explain this output?
$ echo !
!
$ echo !!
echo echo !
echo !
$
I expected sedond echo to write only !!
command-line echo
asked 4 hours ago
SanyaSanya
12
Could somebody explain this output?
$ echo !
!
$ echo !!
echo echo !
echo !
$
I expected sedond echo to write only !!
command-line echo
command-line echo
asked 4 hours ago
SanyaSanya
12
asked 4 hours ago
SanyaSanya
12
asked 4 hours ago
SanyaSanya
12
asked 4 hours ago
SanyaSanya
12
asked 4 hours ago
SanyaSanya
12
12
If you view your commandhistory& decide you want to run command 419 in that history, you can type!419and it'll execute. Provided answers tell you!!executes your last command, but it has other uses too :)
– guiverc
4 hours ago
Same question, although different context: askubuntu.com/q/627781/295286 Effectively duplicate
– Sergiy Kolodyazhnyy
3 hours ago
To prevent the!!from being evaluated (it's being evaluated prior to executing the echo cmd), use quotes, egecho '!!'gnu.org/software/bash/manual/html_node/Quoting.html
– michael
3 hours ago
add a comment |
If you view your commandhistory& decide you want to run command 419 in that history, you can type!419and it'll execute. Provided answers tell you!!executes your last command, but it has other uses too :)
– guiverc
4 hours ago
Same question, although different context: askubuntu.com/q/627781/295286 Effectively duplicate
– Sergiy Kolodyazhnyy
3 hours ago
To prevent the!!from being evaluated (it's being evaluated prior to executing the echo cmd), use quotes, egecho '!!'gnu.org/software/bash/manual/html_node/Quoting.html
– michael
3 hours ago
If you view your command
history & decide you want to run command 419 in that history, you can type !419 and it'll execute. Provided answers tell you !! executes your last command, but it has other uses too :)– guiverc
4 hours ago
If you view your command
history & decide you want to run command 419 in that history, you can type !419 and it'll execute. Provided answers tell you !! executes your last command, but it has other uses too :)– guiverc
4 hours ago
Same question, although different context: askubuntu.com/q/627781/295286 Effectively duplicate
– Sergiy Kolodyazhnyy
3 hours ago
Same question, although different context: askubuntu.com/q/627781/295286 Effectively duplicate
– Sergiy Kolodyazhnyy
3 hours ago
To prevent the
!! from being evaluated (it's being evaluated prior to executing the echo cmd), use quotes, eg echo '!!' gnu.org/software/bash/manual/html_node/Quoting.html– michael
3 hours ago
To prevent the
!! from being evaluated (it's being evaluated prior to executing the echo cmd), use quotes, eg echo '!!' gnu.org/software/bash/manual/html_node/Quoting.html– michael
3 hours ago
add a comment |
2 Answers
2
active
oldest
votes
1
!! means last command.
echo !! will echo last command, which was echo !.
answered 4 hours ago
Manoj SawaiManoj Sawai
6641720
add a comment |
0
Easily explained:
$ echo 1
1
$ !!
echo 1
1
so !! just repeats the last command, so
echo !!
does excactly what it's supposed to to!
;-)
edited 3 hours ago
wjandrea
9,22442463
answered 4 hours ago
FabbyFabby
26.8k1360161
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
1
!! means last command.
echo !! will echo last command, which was echo !.
answered 4 hours ago
Manoj SawaiManoj Sawai
6641720
add a comment |
1
!! means last command.
echo !! will echo last command, which was echo !.
answered 4 hours ago
Manoj SawaiManoj Sawai
6641720
add a comment |
1
1
1
!! means last command.
echo !! will echo last command, which was echo !.
answered 4 hours ago
Manoj SawaiManoj Sawai
6641720
!! means last command.
echo !! will echo last command, which was echo !.
answered 4 hours ago
Manoj SawaiManoj Sawai
6641720
answered 4 hours ago
Manoj SawaiManoj Sawai
6641720
answered 4 hours ago
Manoj SawaiManoj Sawai
6641720
answered 4 hours ago
Manoj SawaiManoj Sawai
6641720
6641720
add a comment |
add a comment |
0
Easily explained:
$ echo 1
1
$ !!
echo 1
1
so !! just repeats the last command, so
echo !!
does excactly what it's supposed to to!
;-)
edited 3 hours ago
wjandrea
9,22442463
answered 4 hours ago
FabbyFabby
26.8k1360161
add a comment |
0
Easily explained:
$ echo 1
1
$ !!
echo 1
1
so !! just repeats the last command, so
echo !!
does excactly what it's supposed to to!
;-)
edited 3 hours ago
wjandrea
9,22442463
answered 4 hours ago
FabbyFabby
26.8k1360161
add a comment |
0
0
0
Easily explained:
$ echo 1
1
$ !!
echo 1
1
so !! just repeats the last command, so
echo !!
does excactly what it's supposed to to!
;-)
edited 3 hours ago
wjandrea
9,22442463
answered 4 hours ago
FabbyFabby
26.8k1360161
Easily explained:
$ echo 1
1
$ !!
echo 1
1
so !! just repeats the last command, so
echo !!
does excactly what it's supposed to to!
;-)
edited 3 hours ago
wjandrea
9,22442463
answered 4 hours ago
FabbyFabby
26.8k1360161
edited 3 hours ago
wjandrea
9,22442463
edited 3 hours ago
wjandrea
9,22442463
edited 3 hours ago
wjandrea
9,22442463
9,22442463
answered 4 hours ago
FabbyFabby
26.8k1360161
answered 4 hours ago
FabbyFabby
26.8k1360161
answered 4 hours ago
FabbyFabby
26.8k1360161
26.8k1360161
add a comment |
add a comment |
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If you view your command
history& decide you want to run command 419 in that history, you can type!419and it'll execute. Provided answers tell you!!executes your last command, but it has other uses too :)– guiverc
4 hours ago
Same question, although different context: askubuntu.com/q/627781/295286 Effectively duplicate
– Sergiy Kolodyazhnyy
3 hours ago
To prevent the
!!from being evaluated (it's being evaluated prior to executing the echo cmd), use quotes, egecho '!!'gnu.org/software/bash/manual/html_node/Quoting.html– michael
3 hours ago