Author Archive for: bermmerb

[Git] How to checkout release from tag

20 Apr
April 20, 2021

The syntax is

git clone -b 'tag' --single-branch --depth 1 https://github.com/git/git.git

For example

git clone -b master --single-branch https://github.com/greenbone/openvas-smb.git
git clone -b gvmd-20.08 --single-branch https://github.com/greenbone/gvmd.git 

[Python] collections of data

04 Apr
April 4, 2021

1. List items are ordered, changeable, and allow duplicate values.

mylist = ["apple", "banana", "cherry"]

2. Tuple items are ordered, unchangeable, and allow duplicate values.

mytuple = ("apple", "banana", "cherry")

3. Set items are unordered, unchangeable, and do not allow duplicate values.

myset = {"apple", "banana", "cherry"}

4. A dictionary is a collection which is ordered*, changeable and does not allow duplicates.

thisdict = {
  "brand": "Ford",
  "model": "Mustang",
  "year": 1964
}

Noted: *As of Python version 3.7, dictionaries are ordered. In Python 3.6 and earlier, dictionaries are unordered.

[Windows terminal] disable WSL terminal highlight and hide ntuser.dat

03 Oct
October 3, 2020

1 Edit .bashrc

bermmerb@Berm-PC:/mnt/c/Users/berm$ sudo vim ~/.bashrc

2 Put the scripts in the end of file.

LS_COLORS="ow=01;36;40" && export LS_COLORS
LS_COMMON="-hG"
LS_COMMON="$LS_COMMON --color=auto"
LS_COMMON="$LS_COMMON -I NTUSER.DAT* -I ntuser.dat*"
test -n "$LS_COMMON" &&
alias ls="command ls $LS_COMMON"
alias ll="ls -l"
alias la="ls -a"
alias lal="ll -a"

3 Restart terminal and done.

Fix vmware-authd.exe authorization service high cpu usage

08 Sep
September 8, 2020

In administrator command prompt

lodctr /R

[Openvas] Fixed The request contained an unknown or invalid Host header

12 May
May 12, 2020

Sometimes when install or update Openvas. There is an error message on web browser indicate that “The request contained an unknown or invalid Host header”

The request contained an unknown or invalid Host header. If you are trying to access GSA via its hostname or a proxy, make sure GSA is set up to allow it.

Here is how to solve this problem.

1. Edit /etc/default/openvas-gsa in the ALLOW_HEADER_HOST

root@host# vim /etc/default/openvas-gsa

2. Uncomment the section and add your host.

# To allow <host> as hostname/address part of a Host header:
#
ALLOW_HEADER_HOST=PUT YOUR HOST NAME HERE

3. restarting gsad service with /etc/init.d/openvas-gsa restart

root@host# /etc/init.d/openvas-gsa restart

4. Done. Verify the result in web browser.

[Ubuntu] Check harddisk health with smartctl, HDD S.M.A.R.T test

24 Mar
March 24, 2020

1. Install

sudo apt-get install smartmontools

2. Verify HDD support S.M.A.R.T

sudo /sbin/sudo smartctl -i /dev/sde
smartctl 7.1 2019-12-30 r5022 [x86_64-linux-5.3.10-1-pve] (local build)
Copyright (C) 2002-19, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Model Family:     Western Digital Green
Device Model:     WDC WD20EZRX-00D8PB0
Serial Number:    WD-WMC4M0DF2257
LU WWN Device Id: 5 0014ee 6afbfdb12
Firmware Version: 80.00A80
User Capacity:    2,000,397,852,160 bytes [2.00 TB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Rotation Rate:    5400 rpm
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   ACS-2 (minor revision not indicated)
SATA Version is:  SATA 3.0, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is:    Tue Mar 24 17:10:57 2020 +07
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

3. Test

sudo /sbin/smartctl -t <short|long|conveyance|select> -C /dev/sde
sudo /sbin/smartctl -t long /dev/sde
smartctl 7.1 2019-12-30 r5022 [x86_64-linux-5.3.10-1-pve] (local build)
Copyright (C) 2002-19, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF OFFLINE IMMEDIATE AND SELF-TEST SECTION ===
Sending command: "Execute SMART Extended self-test routine immediately in off-line mode".
Drive command "Execute SMART Extended self-test routine immediately in off-line mode" successful.
Testing has begun.
Please wait 266 minutes for test to complete.
Test will complete after Tue Mar 24 21:27:39 2020 +07
Use smartctl -X to abort test.

4. Verify result

sudo /sbin/smartctl -a /dev/sde
SMART Self-test log structure revision number 1
Num  Test_Description    Status                  Remaining  LifeTime(hours)  LBA_of_first_error
# 1  Short offline       Completed without error       00%      7757         -

[Proxmox] Manage zpool degrade harddisk and clear degrade status

19 Jan
January 19, 2020
  1. Find degrade hard-disk
root@user-pve:/home/user# /usr/sbin/zpool status -v
  pool: user-storage
 state: DEGRADED
status: One or more devices has experienced an unrecoverable error.  An
        attempt was made to correct the error.  Applications are unaffected.
action: Determine if the device needs to be replaced, and clear the errors
        using 'zpool clear' or replace the device with 'zpool replace'.
   see: http://zfsonlinux.org/msg/ZFS-8000-9P
  scan: scrub repaired 280K in 0 days 04:33:34 with 0 errors on Sun Jan 12 04:57:36 2020
config:

        NAME          STATE     READ WRITE CKSUM
        user-storage  DEGRADED     0     0     0
          raidz1-0    DEGRADED     0     0     0
            sda       ONLINE       0     0     0
            sdb       ONLINE       0     0     0
            sdc       ONLINE       0     0     0
            sdd       ONLINE       0     0     0
            sde       DEGRADED     0     0    74  too many errors

errors: No known data errors
root@user-pve:/home/user#
  1. Check hard-disk status
In this case all hard-disk health seem fine. So the degrade status seem false positive.
  1. Reset degrade status
root@user-pve:/home/user# /usr/sbin/zpool clear user-storage sde
root@user-pve:/home/user# /usr/sbin/zpool status -v
  pool: user-storage
 state: ONLINE
  scan: scrub in progress since Sun Jan 19 19:17:39 2020
        10.7G scanned at 1.53G/s, 1.32M issued at 193K/s, 877G total
        0B repaired, 0.00% done, no estimated completion time
config:

        NAME          STATE     READ WRITE CKSUM
        user-storage  ONLINE       0     0     0
          raidz1-0    ONLINE       0     0     0
            sda       ONLINE       0     0     0
            sdb       ONLINE       0     0     0
            sdc       ONLINE       0     0     0
            sdd       ONLINE       0     0     0
            sde       ONLINE       0     0     0

errors: No known data errors
root@user-pve:/home/user# apt update
  1. Verify status in proxmox

[Fixed] Windows can’t access linux samba share.

08 Nov
November 8, 2019

Had to comment away the following in the config file:

user@ubuntu:~$ sudo vim /etc/samba/smb.conf

Comment out “map to guest = bad user” line.

# This option controls how unsuccessful authentication attempts are mapped
# to anonymous connections
#   map to guest = bad user

Restart samba service

user@ubuntu:~$ sudo /etc/init.d/smbd restart

Done.

[Fixed] ZFS zpool disappear after reboot [ubuntu]

08 Nov
November 8, 2019

After kernel upgrade, ZFS couldn’t start, but some process create some file in the mount point. So after that ZFS can’t start the process ever again. Here’s how to fix.

1. disable service zfs.target and restart.

user@ubuntu:~$ sudo systemctl disable zfs.target

2. after reboot delete or move data in mount point to another location.

3. enable service zfs.target and restart.

user@ubuntu:~$ sudo systemctl enable zfs.target

4. after reboot move data back.

[Splunk revision update] Update splunk version ubuntu

19 Oct
October 19, 2019

1. Download and update using dpkg -i <splunk package>.

user@Lnx:~$ sudo dpkg -i splunk-7.3.2-c60db69f8e32-linux-2.6-amd64.deb 
[sudo] password for <user>: 
(Reading database ... 235721 files and directories currently installed.)
Preparing to unpack splunk-7.3.2-c60db69f8e32-linux-2.6-amd64.deb ...
This looks like an upgrade of an existing Splunk Server. Attempting to stop the installed Splunk Server...
Stopping splunkd...
Shutting down.  Please wait, as this may take a few minutes.
..
Stopping splunk helpers...

Done.
Unpacking splunk (7.3.2) over (7.3.1) ...
Setting up splunk (7.3.2) ...
complete
user@Lnx:~$

2. Update and start service.

user@Lnx:~$ cd /opt/splunk/bin/
user@Lnx:/opt/splunk/bin$ sudo ./splunk enable boot-start
Do you agree with this license? [y/n]: y
Perform migration and upgrade without previewing configuration changes? [y/n] y

3. Restart Splunk service

user@Lnx:~$ sudo service splunk restart

4. Visit splunk url on host.

http://127.0.0.1:51546
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