#!/bin/sh

/etc/init.d/dnsmasq stop
grep -v "debian" /var/dhcp.leases > tmpfile && mv tmpfile /var/dhcp.leases
/etc/init.d/dnsmasq start

#!/bin/sh

/etc/init.d/dnsmasq stop
grep -v "$0" /var/dhcp.leases > tmpfile && mv tmpfile /var/dhcp.leases
/etc/init.d/dnsmasq start

root@BananaPi_BPi-R3 /root [#]# grep -v
BusyBox v1.36.1 (2024-02-19 19:52:06 UTC) multi-call binary.

Usage: grep [-HhnlLoqvsrRiwFE] [-m N] [-A|B|C N] { PATTERN | -e PATTERN... | -f FILE... } [FILE]...

Search for PATTERN in FILEs (or stdin)

        -H      Add 'filename:' prefix
        -h      Do not add 'filename:' prefix
        -n      Add 'line_no:' prefix
        -l      Show only names of files that match
        -L      Show only names of files that don't match
        -c      Show only count of matching lines
        -o      Show only the matching part of line
        -q      Quiet. Return 0 if PATTERN is found, 1 otherwise
        -v      Select non-matching lines
        -s      Suppress open and read errors
        -r      Recurse
        -R      Recurse and dereference symlinks
        -i      Ignore case
        -w      Match whole words only
        -x      Match whole lines only
        -F      PATTERN is a literal (not regexp)
        -E      PATTERN is an extended regexp
        -m N    Match up to N times per file
        -A N    Print N lines of trailing context
        -B N    Print N lines of leading context
        -C N    Same as '-A N -B N'
        -e PTRN Pattern to match
        -f FILE Read pattern from file
root@BananaPi_BPi-R3 /root [#]#

#!/bin/sh

/etc/init.d/dnsmasq stop
grep -v "$0" /var/dhcp.leases > /tmp/tmpfile && mv /tmp/tmpfile /var/dhcp.leases
/etc/init.d/dnsmasq start