untony.orgRecieved 2 additional Raspis and couldnt’stop setting them up unfortunately the display ordered was broken so i didnt build the mobile RetroPi. So I tried it with my cheap china beamer:
Longrunner Cam with Raspberry and self build Lego Case.
Unfortunately broken display (Raspi HD TFT Hat 800×480).
But a 10″ touch screen and case arrived
+ Raspberry Pi 3 B+
+ Anker PowerBar (10000 mAh)
Installed NetPi Image from: https://drive.google.com/drive/folders/1pCzC8NRPJU0gfBHewlNSo_Z0O3xk7fbY
see also:
http://www.blamethenetwork.com/netpiplus/
Install additional Kali-Tools
apt-get install git # git clone https://github.com/LionSec/katoolin.git && sudo cp katoolin/katoolin.py /usr/bin/katoolin chmod +x /usr/bin/katoolin katoolin
establish remote ssh-connection via ssh reverse tunnel (provides ssh-connection to rasp in a network via a server/device with a public ip)
on the raspberry:
ssh -R 2222:localhost:22 loginOfServerIP@ServerIPon server side to connect back to raspberry:
ssh -p 2222 loginOfComputerWithoutPublicIP@localhost
verify usage of autossh if regularely needed
mysql::db do failed: MySQL server has gone away at ./inclibdb.pm line 1848
Solved by
set a higher value for wait_timeout and connect_timeout in my.cnf
from the MySQL Documentation
EXAMPLES
Sleep in the command column of the processlist).Kernel Panic after yum upgrade to kernel 3.10.0-957.1.3.el7.x86_64 ona Centos 7 VM:
– booted old kernel
– no initramfs-3.10.0-957.1.3.el7.x86_64.img in /boot
Solved by
– yum remove kernel-3.10.0-957.1.3.el7.x86_64
– verify uninstallation
rpm -qa | grep kernel | sort
– reinstall
yum install kernel-3.10.0-957.1.3.el7.x86_64
– verify again, check initramfs creation in /boot
rpm -qa | grep kernel | sort ls -la /boot/initram
reboot into new kernel
see also: https://ma.ttias.be/reinstall-the-linux-kernel-on-centos-or-rhel/
Send mail via sendmail
vi /tmp/email.txt
Insert
Subject: Terminal Email Send
Email Content line 1
Email Content line 2
(ESC)wq(ENTER)
sendmail user@example.com < /tmp/email.txt
Quick and dirty, with subject only:
mail -s "Test Subject" user@example.com < /dev/null
Faking Mails with cutomized sender:
mail -s "Everything possible" -aFrom:bill.gargantur@iliketobeanemailfaker.com recipient@maildomain.com < /dev/null
*Will be delivered into spamfolder or not delivered cause SPF checks that mailsender is not authorized sender of the maildomain –> only if accurate spamsolution/SPF is implemented on recipient side
Install/Config sendmail
for just relay edit /etc/mail/sendmail.cf and add:
"Smart" relay host (may be null)
DSrelay.example.com
or if ip based:
"Smart" relay host (may be null)
DS[10.10.10.10]
of course relay host must permit this.
If you ever wanted an automation when a process is not running it is just a small script helping to achieve this:
check_process.sh (dont forget to make it executable)
check_process() {
echo "$ts: checking $1"
[ "$1" = "" ] && return 0
[ `pgrep -f $1` ] && return 1 || return 0
#pgrep -n if process-name match exactly
}
while [ 1 ]; do
# timestamp
ts=`date +%T`
echo "$ts: begin checking..."
check_process "myprog.pl"
[ $? -eq 0 ] && echo "$ts: not running, restarting..." && `/usr/bin/perl /home/me/myprog.pl >/dev/null`
sleep 10 done
You can also send yourself a mail instead of just starting process instead of
/usr/bin/perl /home/me/myprog.pl
do
echo "Subject: Process is stopped" | sendmail yourmail@mail.com
If you want to run this in background do
nohup check_process.sh &
or you can put this on startup via cronjob
crontab -e
@reboot root /home/me/check_process.sh
Origin/Source: https://stackoverflow.com/questions/7708715/check-if-program-is-running-with-bash-shell-script
If you have to find out who has mapped a network drive in Windows start a Command prompt and type
wmic netuse where LocalName="X:" get Username /value
replace „X:“ with the drive you want.
Lack of free space? just type in
du -sk *|sort -n
on /
or any folder you like. You will get an information about space occupation where you can investigate further.
Sample output:
0 fastboot 0 proc 0 sys 4 boot 4 dev 4 lib64 4 media 4 mnt 4 srv 8 aquota.user 8 home 12 aquota.group 16 lost+found 120 tmp 644 run 6080 bin 7244 sbin 8544 etc 29076 lib 1345892 opt 1364796 usr 3028736 root 12280360 var
yum help
yum list available
yum list installed
yum list all
yum list kernel
yum info vsftpd
yum deplist nfs-utils
yum provides “*bin/top”
yum search samba
yum updateinfo security
Query repositories for available package updates
yum check-update
yum install --downloadonly vsftpd
yum install vsftpd
yum update httpd
yum update --security
yum autoremove httpd
yum remove vsftpd
yum downgrade abc
yum clean packages
show-installed
Experienced a memory leak on Windows Server 2011 Small Business Server. Tried to analyze with Process-Explorer and finally found out that the Windows SBS-Manager and the SQL-Database (SBSMonitoring) are the processes which consume more and more memory over the time. After some research i agreed with disabling the two services (https://serverfault.com/questions/522647/removing-sbs-monitoring-permanently-sbs-2008-2011)
