How to get the connected wifi network ssid?

Question

I want to obtain the currently connected wifi networks ssid in a bash script. I am trying to write a backup script where the script will perform a backup to a NAS server if it's connected to my home wifi network. I have looked into the ip route command but it only returns some basic information -

Answer 1

iwgetid -r

or

iwgetid wlan0 -r

Answer 2

The following should provide what you are looking for assuming you are connected using 1 wireless device:

nmcli -t -f ssid dev wifi| cut -d\' -f2

Answer 3

With NetworkManager-1.8.4, this produced the correct result

LANG=C nmcli -t -f active,ssid dev wifi | grep ^yes | cut -d: -f2-

There is a reason for every part of the command

• LANG=C is because we are using grep on localized string so force english
• nmcli ... -f active,ssid ... causes to print ssid with active status in form yes:myssid no:otherssid
• grep ^yes we want to filter active connections, but not SSIDs with text "yes" so it is the reason for ^
• cut ... -f2- prints the rest of the line after the first separator so we can have SSID with separator in it

Answer 4

This command returns the SSID of the connected wireless adapter (assuming you only have one).

iwconfig | grep ESSID | sed -e 's/.*ESSID:"\(.*\)".*/\1/'

It also print warning on the terminal but on stderr so it doesn't matter

remi@host~$id:~$ id=$(iwconfig | grep ESSID | sed -e 's/.*ESSID:"\(.*\)".*/\1/')
eth0      no wireless extensions.
lo        no wireless extensions.
virbr0    no wireless extensions.
tap0      no wireless extensions.

remi@host:~$ echo $id
CISPI

Answer 5

How 'bout iwconfig wlan0 | sed -e '/ESSID/!d' -e 's/.*ESSID:"/"/'?

Answer 6

nmcli -t -f NAME connection show --active

• -t Makes the output 'terse' so no headers
• -f NAME Shows only the ssid
• --active Shows only the active connections

Answer 7

I tried this:

    iwconfig wlan0 | grep ESSID | cut -d\" -f2