Using the below script we tries to connect to different wifi channels of hotspot using iwconfig command. $ vim wifi_channel_hop.sh #!/bin/bash IFACE=wlan0 IEEE80211bg="1 2 3 4 5 6 7 8 9 10 11" IEEE80211bg_intl="$IEEE80211b 12 13 14" IEEE80211a="36 40 44 48 52 56 60 64 149 153 157 161" IEEE80211bga="$IEEE80211bg $IEEE80211a" IEEE80211bga_intl="$IEEE80211bg_intl $IEEE80211a" while true ; do for CHAN in $IEEE80211bg ; do echo "Switching to channel $CHAN" sudo iwconfig $IFACE channel $CHAN sleep 1 done done Reference: https://github.com/brannondorsey/sniff-probes/blob/master/sniff-probes.sh

Command line execution

Terminalbash
sudo iwconfig $IFACE channel $CHAN                 sleep 1                 done done Reference: https://github.com/brannondorsey/sniff-probes/blob/master/sniff-probes.sh

Gotchas and common issues

  • Permission checks - verify user access rights and sudo privileges before executing system-level operations.

  • Environment configuration - double-check path variables and dependency versions to prevent runtime failures.

  • Backup safeguards - maintain configuration backups before applying system or database modifications.

Following these steps ensures clean configuration and reliable execution for shell script for switching wifi channel using hopping.