One-liner: how to do a ping sweep in bash

Ping sweep from 10.0.1.1 to 10.0.1.31:

 for i in {1..31}; do ping -c 1 10.0.1.$i | fgrep ttl & done 2>/dev/null | sed -e 's/^.*from //' -e 's/:.*$//' | sort -n -t. -k4

Result:

10.0.1.1
10.0.1.2
10.0.1.3
10.0.1.7
10.0.1.9
10.0.1.10
10.0.1.12
10.0.1.13
10.0.1.14
10.0.1.15
10.0.1.16
10.0.1.17
10.0.1.18
10.0.1.19
10.0.1.20

One-liner: how to search media files for file and track names

Let’s find all media files with file or track names containing the word “brain” recursively beginning from the current directory:

find . -type f -exec mediainfo '{}' \+ | tr -s ' ' | tr -s '      ' | sed -e 's/ : /:/' | awk -F: 'function aprt () {printf("%s | %s | %s\n",a["Complete name"], a["Duration"], a["Track name"]);a["Complete name"]="";a["Duration"]="";a["Track name"]="";} {a[$1]=$2} /^General/ {aprt()} END {aprt()}' | fgrep -i brain

Result (file name | duration | track name):

./Jazz Side of the Moon/8 Brain Damage.flac | 6 min 20 s | 
./Pink Floyd - TDSOTM - (CP35-3017 Japanese Black Triangle)/8 Brain Damage.flac | 3 min 50 s | Brain Damage
./The Dark Side of The Moon/09.flac | 3 min 51 s | Brain Damage
./Vocomotion - Dark Side of the Moon/08 - Vocomotion - Brain Damage.mp3 | 3 min 53 s | Brain Damage

The “one-liner” above could have been simpler and faster, if there were no spaces in the file names.

One-liner: how to convert CheckPoint netconf.C routes to Gaia/Clish commands

Provided all route metrics are zeroes:

cat /etc/sysconfig/netconf.C | tr '(' ' '| tr ')' ' ' | tr '"' ' '| tr ':' ' ' | tr '\t' ' '| tr -s ' '| sed -e 's/^ //' | sed 's/routes//' | awk '/route/ {printf("set static-route ");} /dest/ {printf("%s ",$2);} /via/ {printf("nexthop gateway address %s ",$2);} /metric/ {print "on"}'

The result:

set static-route 10.13.198.160/27 nexthop gateway address 10.12.12.1 on
set static-route 10.13.198.192/27 nexthop gateway address 10.12.12.1 on
set static-route 192.168.112.0/24 nexthop gateway address 10.12.12.1 on
set static-route 192.168.113.0/24 nexthop gateway address 10.12.12.1 on
set static-route 192.168.114.0/24 nexthop gateway address 10.12.12.1 on
set static-route 192.168.115.0/24 nexthop gateway address 10.12.12.1 on
set static-route default nexthop gateway address 10.0.0.1 on

One-liner: how to check file growth in real time

Not quite a one-liner, but it can be copy&pasted in a terminal window ;)

bash
TIME=10
FILE=file.log
function fsize {
	SIZE=`ls -l $FILE | awk '{print $5}'`
}
fsize
S1=$SIZE
while true
do
	sleep $TIME
	fsize
	S2=$SIZE
	(( DIFF=($S2-$S1)/$TIME ))
	echo "($S2-$S1)/$TIME = $DIFF"
	S1=$S2
done

The script above will check the “file.log” size every 10 seconds and output the previous size, the new size and bytes per second:

(30117062-30085517)/10 = 3154
(30148404-30117062)/10 = 3134
(30179199-30148404)/10 = 3079
^C
^D

Python on Solaris: Wrong ELF class: ELFCLASS64

If “pip” installed 64-bit libraries, while python is a 32-bit binary, “pkg” might stop working with the following error messages:

ImportError: ld.so.1: bootadm: fatal: /usr/lib/python2.7/site-packages/lxml/etree.so: wrong ELF class: ELFCLASS64
ImportError: ld.so.1: python2.7: fatal: /usr/lib/python2.7/site-packages/_cffi_backend.so: wrong ELF class: ELFCLASS64
$ file `which python`
/usr/bin/python:	ELF 32-bit LSB executable 80386 Version 1 [SSE], dynamically linked, not stripped

The workaround is to remove the corresponding python packages (in this case cffi and lxml), download and recompile them manually with “-m32”:

$ export CFLAGS="-m32"

One-liner: how to generate group-url for all remote-access tunnel-groups (Cisco ASA)

This one-liner takes Cisco ASA config, checks for “tunnel-group … remote-access” and generates the following two lines:

tunnel-group GROUPNAME webvpn-attributes
 group-url https://CISCO_ASA_FW_FQDN/GROUPNAME enable
for i in `fgrep tunnel-group CISCO_ASA.conf | fgrep remote-access | awk '{print $2}'`
do
echo "tunnel-group $i webvpn-attributes"
echo " group-url https://CISCO_ASA_FW_FQDN/$i enable"
done