Useful Commands
==============
Public domain
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### Using regular expresion and sed
cat index.html | sed -e 's/<a href=".*">/" "/g'
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### Fromating flash storage
first we have to find flash hard link
dmesg | tail
or
lsblk
format to FAT
sudo mkdosfs -n 'Label' -I /dev/{hard link}
format to EXT3:
sudo mkfs.ext3 -n 'Label' -I /dev/{hard link}
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### Display all local devices' IP
sudo arp-scan --localnet
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### resolve DNS from specific dns server
dig www.rangin.net @a.root-servers.net
dig www.rangin.net @192.5.6.30
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### SOCKS proxy for all programs
tsocks' role is to allow non SOCKS aware applications (e.g telnet, ssh, ftp etc) to use SOCKS without any modification. It does this by intercepting the calls that applications make to establish network connections and negotating them through a SOCKS server as necessary.
apt-get install tsocks
Edit the file: ā€/etc/tsocks.confā€¯
server = 127.0.0.1
server_port = 1080
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### Syncing with help of ftp
echo 'mirror --reverse --deleteĀ --only-newer --verbose /home/pesarkhobeee/mp3 /public_html/mp3 ' | lftp -u farid,linux@zanjan zanjanlug.org
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### Virtual terminal with help of screen
screen -S "name"
screen -ls #screen list
screen -r screen name #reattach
* Ctrl-A ? => help
* Ctrl-A c => creat new windows
* Ctrl-A n => next windows
* Ctrl-A p => previous windows
* Ctrl-A d => detach Screen
* Ctrl-A k => exit
* Ctrl-A H => creat running log
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### Request to DHCPServer
sudo dhclient eth0
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### TimeZone
You can check your current timezone by just running
date
Thu Mar 21 18:02:49 MST 2012
Or checking the timezone file at
more /etc/timezone
US/Arizona
So to change it just run
sudo dpkg-reconfigure tzdata
And follow on screen instructions. Easy.
Also be sure to restart cron as it wonā€™t pick up the timezone change and will still be running on UTC.
/etc/init.d/cron stop
/etc/init.d/cron start
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### The Network Time Protocol daemon
The ntp daemon ntpd calculates the drift of your system clock and continuously adjusts it, so there are no large corrections that could lead to inconsistent logs for instance. The cost is a little processing power and memory, but for a modern server this is negligible.
Installation
To install ntpd, from a terminal prompt enter:
sudo apt-get install ntp
Configuration
Edit /etc/ntp.conf to add/remove server lines. By default these servers are configured:
# Use servers from the NTP Pool Project. Approved by Ubuntu Technical Board
# on 2011-02-08 (LP: #104525). See http://www.pool.ntp.org/join.html for
# more information.
server 0.ubuntu.pool.ntp.org
server 1.ubuntu.pool.ntp.org
server 2.ubuntu.pool.ntp.org
server 3.ubuntu.pool.ntp.org
After changing the config file you have to reload the ntpd:
sudo /etc/init.d/ntp reload
View status
Use ntpq to see to see more info:
sudo ntpq -p
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### Monitor TCP traffic
tcpdump -i eth0 -nq host 216.239.32.20
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### Automate Download process with help of aria2 and cronjob
touch /home/pi/Downloads/session.txt && aria2c --save-session=/home/pi/Downloads/session.txt --input-file=/home/pi/Downloads/session.txt -x16 -s16 -k1M --dir=/home/pi/Downloads
crontab -e
0 2 * * * /usr/bin/screen -dmS filmjoo /home/pi/Downloads/download.sh
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### sshuttle: where transparent proxy meets VPN meets ssh
sshuttle -r root@178.162.199.55 0.0.0.0/0
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### Standalone and cli base network manager
iwlist wlan0 scan
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### Dont display all comments and white space line from a text file
egrep -v '^#|^ *$' /etc/sysctl.conf
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_BY: Farid Ahmadian_
_TAG: bash, network, commandline_
_DATE: 2017-04-23 13:30:10_