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BASH fork

Posted 04-05-2020 at 05:11 PM by karanis

Tags bash, fork

#!/usr/bin/bash
function_to_fork() {
...
}

function_to_fork &
# ... execution continues in parent process ...

karanis

LQ Newbie

Posted in Uncategorized

Views 211 Comments 0 karanis is offline

nmap Scan Network (better&faster)

Posted 04-05-2020 at 05:10 PM by karanis

Tags bash, net

nmap -sL 192.168.*.* | grep \(1
ip neigh show dev eth1

karanis

LQ Newbie

Posted in Uncategorized

Views 259 Comments 0 karanis is offline

non-Interactive self signed Certificate

Posted 04-05-2020 at 05:08 PM by karanis

Tags openssl

openssl req -new -newkey rsa:4096 -days 365 -nodes -x509 \
-subj "/C=US/ST=Denial/L=Springfield/O=Dis/CN=www.example.com" \
-keyout www.example.com.key -out www.example.com.cert

karanis

LQ Newbie

Posted in Uncategorized

Views 186 Comments 0 karanis is offline

SSH : add a host to ~/.ssh/known_hosts

Posted 04-05-2020 at 05:06 PM by karanis

Tags ssh

ssh-keyscan -t rsa -H 192.168.2.124 >> ~/.ssh/known_hosts

karanis

LQ Newbie

Posted in Uncategorized

Views 142 Comments 0 karanis is offline

POWER OFF spinning disk

Posted 04-05-2020 at 05:03 PM by karanis

Tags energy, power off, spinning disk

If you are aware and paranoid on energy saving on spinning disks (which 'as they spin, they die sooner') like me, you may need :

# udisksctl power-off -b /dev/sdX

or

# hdparm -S 1 /dev/sdb

/* for hot plugs */
edit "/etc/udev/rules.d/45-sdX-power.rules" file
ACTION=="add", SUBSYSTEM=="block", KERNEL=="sdX", ATTR{queue/rotational}=="1", RUN+="/path/to/hdparm -S 1 /dev/sdX"...

karanis

LQ Newbie

Posted in Uncategorized

Views 224 Comments 0 karanis is offline