how to print interface names only
Clash Royale CLAN TAG#URR8PPP
up vote
1
down vote
favorite
i want to print interface names only from iwconfig command
this is output of iwconfig:
wlp2s0 IEEE 802.11 ESSID:"CoreFragment"
Mode:Managed Frequency:2.442 GHz Access Point: 0C:D2:B5:55:DF:74
Bit Rate=72.2 Mb/s Tx-Power=22 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:on
Link Quality=55/70 Signal level=-55 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:4 Invalid misc:6567 Missed beacon:0
enp3s0 no wireless extensions.
wlx00e02d01076f IEEE 802.11bgn ESSID:"Aleph_inCar" Nickname:"<WIFI@REALTEK>"
Mode:Master Frequency:2.412 GHz Access Point: 00:E0:2D:01:07:6F
Bit Rate:72.2 Mb/s Sensitivity:0/0
Retry:off RTS thr:off Fragment thr:off
Power Management:off
Link Quality=4/100 Signal level=4/100 Noise level=0/100
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0
lo no wireless extensions.
enx001e101f0000 no wireless extensions.
I tried this :
iwconfig | grep ESSID | sed 's/"//g' | cut -f1 -d" "
but i got no wireless extension also in output
i want to get output from iwconfig command only
how print wlp2s0,enp3s0,wlx00e02d01076f,enx001e101f0000 only...
ubuntu network-interface
edited Dec 7 at 8:36
Kusalananda
120k16225369
asked Dec 7 at 8:02
yash shah
105
|
show 1 more comment
up vote
1
down vote
favorite
i want to print interface names only from iwconfig command
this is output of iwconfig:
wlp2s0 IEEE 802.11 ESSID:"CoreFragment"
Mode:Managed Frequency:2.442 GHz Access Point: 0C:D2:B5:55:DF:74
Bit Rate=72.2 Mb/s Tx-Power=22 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:on
Link Quality=55/70 Signal level=-55 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:4 Invalid misc:6567 Missed beacon:0
enp3s0 no wireless extensions.
wlx00e02d01076f IEEE 802.11bgn ESSID:"Aleph_inCar" Nickname:"<WIFI@REALTEK>"
Mode:Master Frequency:2.412 GHz Access Point: 00:E0:2D:01:07:6F
Bit Rate:72.2 Mb/s Sensitivity:0/0
Retry:off RTS thr:off Fragment thr:off
Power Management:off
Link Quality=4/100 Signal level=4/100 Noise level=0/100
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0
lo no wireless extensions.
enx001e101f0000 no wireless extensions.
I tried this :
iwconfig | grep ESSID | sed 's/"//g' | cut -f1 -d" "
but i got no wireless extension also in output
i want to get output from iwconfig command only
how print wlp2s0,enp3s0,wlx00e02d01076f,enx001e101f0000 only...
ubuntu network-interface
edited Dec 7 at 8:36
Kusalananda
120k16225369
asked Dec 7 at 8:02
yash shah
105
yash did you try to pass the interface likewlp2s0to the ifconfig command?
– Valentin Bajrami
Dec 7 at 8:22
yes.. I tried but i want to see my output from iwconfig @ValentinBajrami
– yash shah
Dec 7 at 8:27
1
then the easiest way would beiwconfig 2>/dev/null | awk '/ESSID/print $1'
– Valentin Bajrami
Dec 7 at 8:37
1
Unclear: You say you don't want the interfaces with no wireless extension, but then you list these in the desired output. What are you going to use the wireless interface names for?
– Kusalananda
Dec 7 at 8:40
2
Ok, so the question changed once again. Do you wantloalso in the output? Why would you wantenp3s0in the output. Why does it have to do with wireless interfaces?
– Valentin Bajrami
Dec 7 at 8:40
|
show 1 more comment
up vote
1
down vote
favorite
up vote
1
down vote
favorite
i want to print interface names only from iwconfig command
this is output of iwconfig:
wlp2s0 IEEE 802.11 ESSID:"CoreFragment"
Mode:Managed Frequency:2.442 GHz Access Point: 0C:D2:B5:55:DF:74
Bit Rate=72.2 Mb/s Tx-Power=22 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:on
Link Quality=55/70 Signal level=-55 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:4 Invalid misc:6567 Missed beacon:0
enp3s0 no wireless extensions.
wlx00e02d01076f IEEE 802.11bgn ESSID:"Aleph_inCar" Nickname:"<WIFI@REALTEK>"
Mode:Master Frequency:2.412 GHz Access Point: 00:E0:2D:01:07:6F
Bit Rate:72.2 Mb/s Sensitivity:0/0
Retry:off RTS thr:off Fragment thr:off
Power Management:off
Link Quality=4/100 Signal level=4/100 Noise level=0/100
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0
lo no wireless extensions.
enx001e101f0000 no wireless extensions.
I tried this :
iwconfig | grep ESSID | sed 's/"//g' | cut -f1 -d" "
but i got no wireless extension also in output
i want to get output from iwconfig command only
how print wlp2s0,enp3s0,wlx00e02d01076f,enx001e101f0000 only...
ubuntu network-interface
edited Dec 7 at 8:36
Kusalananda
120k16225369
asked Dec 7 at 8:02
yash shah
105
i want to print interface names only from iwconfig command
this is output of iwconfig:
wlp2s0 IEEE 802.11 ESSID:"CoreFragment"
Mode:Managed Frequency:2.442 GHz Access Point: 0C:D2:B5:55:DF:74
Bit Rate=72.2 Mb/s Tx-Power=22 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:on
Link Quality=55/70 Signal level=-55 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:4 Invalid misc:6567 Missed beacon:0
enp3s0 no wireless extensions.
wlx00e02d01076f IEEE 802.11bgn ESSID:"Aleph_inCar" Nickname:"<WIFI@REALTEK>"
Mode:Master Frequency:2.412 GHz Access Point: 00:E0:2D:01:07:6F
Bit Rate:72.2 Mb/s Sensitivity:0/0
Retry:off RTS thr:off Fragment thr:off
Power Management:off
Link Quality=4/100 Signal level=4/100 Noise level=0/100
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0
lo no wireless extensions.
enx001e101f0000 no wireless extensions.
I tried this :
iwconfig | grep ESSID | sed 's/"//g' | cut -f1 -d" "
but i got no wireless extension also in output
i want to get output from iwconfig command only
how print wlp2s0,enp3s0,wlx00e02d01076f,enx001e101f0000 only...
ubuntu network-interface
ubuntu network-interface
edited Dec 7 at 8:36
Kusalananda
120k16225369
asked Dec 7 at 8:02
yash shah
105
edited Dec 7 at 8:36
Kusalananda
120k16225369
asked Dec 7 at 8:02
yash shah
105
edited Dec 7 at 8:36
Kusalananda
120k16225369
edited Dec 7 at 8:36
Kusalananda
120k16225369
edited Dec 7 at 8:36
Kusalananda
120k16225369
120k16225369
asked Dec 7 at 8:02
yash shah
105
asked Dec 7 at 8:02
yash shah
105
asked Dec 7 at 8:02
yash shah
105
105
yash did you try to pass the interface likewlp2s0to the ifconfig command?
– Valentin Bajrami
Dec 7 at 8:22
yes.. I tried but i want to see my output from iwconfig @ValentinBajrami
– yash shah
Dec 7 at 8:27
1
then the easiest way would beiwconfig 2>/dev/null | awk '/ESSID/print $1'
– Valentin Bajrami
Dec 7 at 8:37
1
Unclear: You say you don't want the interfaces with no wireless extension, but then you list these in the desired output. What are you going to use the wireless interface names for?
– Kusalananda
Dec 7 at 8:40
2
Ok, so the question changed once again. Do you wantloalso in the output? Why would you wantenp3s0in the output. Why does it have to do with wireless interfaces?
– Valentin Bajrami
Dec 7 at 8:40
|
show 1 more comment
yash did you try to pass the interface likewlp2s0to the ifconfig command?
– Valentin Bajrami
Dec 7 at 8:22
yes.. I tried but i want to see my output from iwconfig @ValentinBajrami
– yash shah
Dec 7 at 8:27
1
then the easiest way would beiwconfig 2>/dev/null | awk '/ESSID/print $1'
– Valentin Bajrami
Dec 7 at 8:37
1
Unclear: You say you don't want the interfaces with no wireless extension, but then you list these in the desired output. What are you going to use the wireless interface names for?
– Kusalananda
Dec 7 at 8:40
2
Ok, so the question changed once again. Do you wantloalso in the output? Why would you wantenp3s0in the output. Why does it have to do with wireless interfaces?
– Valentin Bajrami
Dec 7 at 8:40
yash did you try to pass the interface like
wlp2s0 to the ifconfig command?– Valentin Bajrami
Dec 7 at 8:22
yash did you try to pass the interface like
wlp2s0 to the ifconfig command?– Valentin Bajrami
Dec 7 at 8:22
yes.. I tried but i want to see my output from iwconfig @ValentinBajrami
– yash shah
Dec 7 at 8:27
yes.. I tried but i want to see my output from iwconfig @ValentinBajrami
– yash shah
Dec 7 at 8:27
1
1
then the easiest way would be
iwconfig 2>/dev/null | awk '/ESSID/print $1'– Valentin Bajrami
Dec 7 at 8:37
then the easiest way would be
iwconfig 2>/dev/null | awk '/ESSID/print $1'– Valentin Bajrami
Dec 7 at 8:37
1
1
Unclear: You say you don't want the interfaces with no wireless extension, but then you list these in the desired output. What are you going to use the wireless interface names for?
– Kusalananda
Dec 7 at 8:40
Unclear: You say you don't want the interfaces with no wireless extension, but then you list these in the desired output. What are you going to use the wireless interface names for?
– Kusalananda
Dec 7 at 8:40
2
2
Ok, so the question changed once again. Do you want
lo also in the output? Why would you want enp3s0 in the output. Why does it have to do with wireless interfaces?– Valentin Bajrami
Dec 7 at 8:40
Ok, so the question changed once again. Do you want
lo also in the output? Why would you want enp3s0 in the output. Why does it have to do with wireless interfaces?– Valentin Bajrami
Dec 7 at 8:40
|
show 1 more comment
1 Answer
1
active
oldest
votes
up vote
2
down vote
accepted
Your command works perfectly. Simply redirect the STDERR output to STDOUT, so that grep and cut process them as you want:
iwconfig 2>&1 | grep ESSID | sed 's/"//g' | cut -f1 -d" "
However, this method using grep, sed and cut is an overkill. A single grep can get you what you want as suggested in the update below.
UDPATE:
As per the edited question, and given that the user is using Ubuntu (and hence the grep supports Perl regex), here is one method:
iwconfig 2>&1 | grep -oP "^w+"
answered Dec 7 at 8:22
shivams
2,86611425
how I can remove lo from your suggested command :iwconfig 2>&1 | grep -oP "^w+"
– yash shah
Dec 7 at 9:27
otherwise it works... @shivams
– yash shah
Dec 7 at 9:28
I think the use ofgrep,sedandcutis overkill for such a trivial task
– Valentin Bajrami
Dec 7 at 9:39
@ValentinBajrami Yes. But the combination of the 3 was the one suggested by the OP. I have suggested an updated version.
– shivams
Dec 7 at 14:54
@yashshah to removelo, just add one moregrepto the pipe:iwconfig 2>&1 | grep -oP "^w+" | grep -v lo
– shivams
Dec 7 at 22:05
|
show 1 more comment
Your Answer
StackExchange.ready(function()
var channelOptions =
tags: "".split(" "),
id: "106"
;
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function()
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled)
StackExchange.using("snippets", function()
createEditor();
);
else
createEditor();
);
function createEditor()
StackExchange.prepareEditor(
heartbeatType: 'answer',
convertImagesToLinks: false,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: null,
bindNavPrevention: true,
postfix: "",
imageUploader:
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
,
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
);
);
draft saved
draft discarded
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2funix.stackexchange.com%2fquestions%2f486528%2fhow-to-print-interface-names-only%23new-answer', 'question_page');
);
Post as a guest
Required, but never shown
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
2
down vote
accepted
Your command works perfectly. Simply redirect the STDERR output to STDOUT, so that grep and cut process them as you want:
iwconfig 2>&1 | grep ESSID | sed 's/"//g' | cut -f1 -d" "
However, this method using grep, sed and cut is an overkill. A single grep can get you what you want as suggested in the update below.
UDPATE:
As per the edited question, and given that the user is using Ubuntu (and hence the grep supports Perl regex), here is one method:
iwconfig 2>&1 | grep -oP "^w+"
answered Dec 7 at 8:22
shivams
2,86611425
how I can remove lo from your suggested command :iwconfig 2>&1 | grep -oP "^w+"
– yash shah
Dec 7 at 9:27
otherwise it works... @shivams
– yash shah
Dec 7 at 9:28
I think the use ofgrep,sedandcutis overkill for such a trivial task
– Valentin Bajrami
Dec 7 at 9:39
@ValentinBajrami Yes. But the combination of the 3 was the one suggested by the OP. I have suggested an updated version.
– shivams
Dec 7 at 14:54
@yashshah to removelo, just add one moregrepto the pipe:iwconfig 2>&1 | grep -oP "^w+" | grep -v lo
– shivams
Dec 7 at 22:05
|
show 1 more comment
up vote
2
down vote
accepted
Your command works perfectly. Simply redirect the STDERR output to STDOUT, so that grep and cut process them as you want:
iwconfig 2>&1 | grep ESSID | sed 's/"//g' | cut -f1 -d" "
However, this method using grep, sed and cut is an overkill. A single grep can get you what you want as suggested in the update below.
UDPATE:
As per the edited question, and given that the user is using Ubuntu (and hence the grep supports Perl regex), here is one method:
iwconfig 2>&1 | grep -oP "^w+"
answered Dec 7 at 8:22
shivams
2,86611425
how I can remove lo from your suggested command :iwconfig 2>&1 | grep -oP "^w+"
– yash shah
Dec 7 at 9:27
otherwise it works... @shivams
– yash shah
Dec 7 at 9:28
I think the use ofgrep,sedandcutis overkill for such a trivial task
– Valentin Bajrami
Dec 7 at 9:39
@ValentinBajrami Yes. But the combination of the 3 was the one suggested by the OP. I have suggested an updated version.
– shivams
Dec 7 at 14:54
@yashshah to removelo, just add one moregrepto the pipe:iwconfig 2>&1 | grep -oP "^w+" | grep -v lo
– shivams
Dec 7 at 22:05
|
show 1 more comment
up vote
2
down vote
accepted
up vote
2
down vote
accepted
Your command works perfectly. Simply redirect the STDERR output to STDOUT, so that grep and cut process them as you want:
iwconfig 2>&1 | grep ESSID | sed 's/"//g' | cut -f1 -d" "
However, this method using grep, sed and cut is an overkill. A single grep can get you what you want as suggested in the update below.
UDPATE:
As per the edited question, and given that the user is using Ubuntu (and hence the grep supports Perl regex), here is one method:
iwconfig 2>&1 | grep -oP "^w+"
answered Dec 7 at 8:22
shivams
2,86611425
Your command works perfectly. Simply redirect the STDERR output to STDOUT, so that grep and cut process them as you want:
iwconfig 2>&1 | grep ESSID | sed 's/"//g' | cut -f1 -d" "
However, this method using grep, sed and cut is an overkill. A single grep can get you what you want as suggested in the update below.
UDPATE:
As per the edited question, and given that the user is using Ubuntu (and hence the grep supports Perl regex), here is one method:
iwconfig 2>&1 | grep -oP "^w+"
answered Dec 7 at 8:22
shivams
2,86611425
edited Dec 7 at 14:55
answered Dec 7 at 8:22
shivams
2,86611425
answered Dec 7 at 8:22
shivams
2,86611425
answered Dec 7 at 8:22
shivams
2,86611425
2,86611425
how I can remove lo from your suggested command :iwconfig 2>&1 | grep -oP "^w+"
– yash shah
Dec 7 at 9:27
otherwise it works... @shivams
– yash shah
Dec 7 at 9:28
I think the use ofgrep,sedandcutis overkill for such a trivial task
– Valentin Bajrami
Dec 7 at 9:39
@ValentinBajrami Yes. But the combination of the 3 was the one suggested by the OP. I have suggested an updated version.
– shivams
Dec 7 at 14:54
@yashshah to removelo, just add one moregrepto the pipe:iwconfig 2>&1 | grep -oP "^w+" | grep -v lo
– shivams
Dec 7 at 22:05
|
show 1 more comment
how I can remove lo from your suggested command :iwconfig 2>&1 | grep -oP "^w+"
– yash shah
Dec 7 at 9:27
otherwise it works... @shivams
– yash shah
Dec 7 at 9:28
I think the use ofgrep,sedandcutis overkill for such a trivial task
– Valentin Bajrami
Dec 7 at 9:39
@ValentinBajrami Yes. But the combination of the 3 was the one suggested by the OP. I have suggested an updated version.
– shivams
Dec 7 at 14:54
@yashshah to removelo, just add one moregrepto the pipe:iwconfig 2>&1 | grep -oP "^w+" | grep -v lo
– shivams
Dec 7 at 22:05
how I can remove lo from your suggested command :iwconfig 2>&1 | grep -oP "^w+"
– yash shah
Dec 7 at 9:27
how I can remove lo from your suggested command :iwconfig 2>&1 | grep -oP "^w+"
– yash shah
Dec 7 at 9:27
otherwise it works... @shivams
– yash shah
Dec 7 at 9:28
otherwise it works... @shivams
– yash shah
Dec 7 at 9:28
I think the use of
grep , sed and cut is overkill for such a trivial task– Valentin Bajrami
Dec 7 at 9:39
I think the use of
grep , sed and cut is overkill for such a trivial task– Valentin Bajrami
Dec 7 at 9:39
@ValentinBajrami Yes. But the combination of the 3 was the one suggested by the OP. I have suggested an updated version.
– shivams
Dec 7 at 14:54
@ValentinBajrami Yes. But the combination of the 3 was the one suggested by the OP. I have suggested an updated version.
– shivams
Dec 7 at 14:54
@yashshah to remove
lo, just add one more grep to the pipe: iwconfig 2>&1 | grep -oP "^w+" | grep -v lo– shivams
Dec 7 at 22:05
@yashshah to remove
lo, just add one more grep to the pipe: iwconfig 2>&1 | grep -oP "^w+" | grep -v lo– shivams
Dec 7 at 22:05
|
show 1 more comment
draft saved
draft discarded
Thanks for contributing an answer to Unix & Linux Stack Exchange!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Some of your past answers have not been well-received, and you're in danger of being blocked from answering.
Please pay close attention to the following guidance:
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
draft saved
draft discarded
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2funix.stackexchange.com%2fquestions%2f486528%2fhow-to-print-interface-names-only%23new-answer', 'question_page');
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
yash did you try to pass the interface like
wlp2s0to the ifconfig command?– Valentin Bajrami
Dec 7 at 8:22
yes.. I tried but i want to see my output from iwconfig @ValentinBajrami
– yash shah
Dec 7 at 8:27
1
then the easiest way would be
iwconfig 2>/dev/null | awk '/ESSID/print $1'– Valentin Bajrami
Dec 7 at 8:37
1
Unclear: You say you don't want the interfaces with no wireless extension, but then you list these in the desired output. What are you going to use the wireless interface names for?
– Kusalananda
Dec 7 at 8:40
2
Ok, so the question changed once again. Do you want
loalso in the output? Why would you wantenp3s0in the output. Why does it have to do with wireless interfaces?– Valentin Bajrami
Dec 7 at 8:40