echo "I'm a Unix Creationist, the world was created on $(TZ=GMT date -d @0) and it will end on $(TZ=GMT date -d @$((2**31-1)))"
encfsctl passwd /home/bredsaal/encfs_test/plain/
http://bredsaal.dk/how-to-change-encfs-password
depending on how you use ES, in my cases, I would never have indexes over half my RAM - Sorry - I cant wait for ages for data :)
#!/bin/bash
# Delete all containers
docker rm $(docker ps -a -q)
# Delete all images
docker rmi $(docker images -q)
docker-compose stop -t 1 worker
docker-compose build worker
docker-compose up --no-start worker
docker-compose start worker
sudo killall -HUP mDNSResponder
fdupes -rndfS directory/
CRTL+a SHIFT-s: screen-split horizontal
CRTL+a SHIFT-|: screen-split vertical
CTRL+a y TAB (tabulación): moves between spaces
CTRL+a SHIFT-C: Create new window in spaces
CTRL+a n: moves to current window
CTRL+a SHIFT-x : close current space
CTRL+a SHIFT+q : close all spaces except current
$ yum update
$ yum -y install net-tools vim screen mc less openssh-server curl wget
$ systemctl start sshd.service
$ yum -y install epel-release
$ cp /usr/share/zoneinfo/GB /etc/localtime
root@elkb ~ $ cp /usr/share/zoneinfo/Europe/Madrid /etc/localtime
$ yum whatprovides ifconfig
$ yum install net-tools <-- Provides **ifconfig**
$ yum -y groupinstall "Development Tools" <-- Install compilation tools
vi /etc/sysconfig/network-scripts/ifcfg-eth0
I will change the file like this:
#My IP description
# IPv-4
DEVICE="eth0"
NM_CONTROLLED="yes"
ONBOOT=yes
HWADDR=20:89:84:c8:12:8a
TYPE=Ethernet
BOOTPROTO=static
NAME="System eth0"
UUID=5fb06bd0-0bb0-7ffb-45f1-d6edd65f3e03
sysctl -p -w vm.max_map_count=262144
rpm -ivh http://yum.puppetlabs.com/puppetlabs-release-el-7.noarch.rpm
If your internet connection is behind a web proxy, you need to configure the following on your CentOS server:
System-wide proxy settings - add the following lines to your /etc/environment file:
$ vi /etc/environment
Add the following lines.
http_proxy="http://proxysrv:8080/"
https_proxy="https://proxysrv:8080/"
ftp_proxy="ftp://proxysrv:8080/"
no_proxy=".mylan.local,.domain1.com,host1,host2"
To apply these settings without restarting the machine run the following commands on the bash shell:
export http_proxy="http://proxysrv:8080/"
export https_proxy="https://proxysrv:8080/"
export ftp_proxy="ftp://proxysrv:8080/"
export no_proxy=".mylan.local,.domain1.com,host1,host2"
You also need to configure yum:
vi /etc/yum.conf
Try with
apt-cache madison myPackage
Quote from man page:
It displays available versions of a package in a tabular format.
Also you can
apt-cache policy package
and then
apt-get install package=version
First get the git-completion.bash script (view it here) and put it in your home directory:
curl https://raw.githubusercontent.com/git/git/master/contrib/completion/git-completion.bash -o ~/.git-completion.bash
Next, add the following lines to your .bash_profile. This tells bash to execute the git autocomplete script if it exists.
if [ -f ~/.git-completion.bash ]; then
. ~/.git-completion.bash
fi
The problem is that .gitignore ignores just files that weren't tracked before (by git add). Run git rm --cached name_of_file and your file will be ignored again (in case it's mentioned in .gitignore).
git checkout master # first get back to master
git checkout experiment -- app.js # then copy the version of app.js
# from branch "experiment"
git checkout otherbranch myfile.txt
To remove a local branch
git branch -d the_local_branch
To remove a remote branch (if you know what you are doing!)
git push origin --delete the_remote_branch
To disable TLS/SSL verification for a single git command try passing -c to git with the proper config variable, or use Flow's answer:
git -c http.sslVerify=false clone https://example.com/path/to/git
To disable SSL verification for a specific repository If the repository is completely under your control, you can try:
git config http.sslVerify false
Disabling TLS(/SSL) certificate verification globally is a terribly insecure practice. Don't do it.
Do not issue the above command with a --global modifier.
On your server (A):
nc -l -p 1234 -q 1 > something.zip < /dev/null
On your "sender client" (B):
cat something.zip | netcat server.ip.here 1234
V - selects entire lines
v - selects range of text
ctrl-v - selects columns
gv - reselect block
After selecting the text, try d to delete, or y to copy, or :s/match/replace/, or :center, or !sort, or...
I finally found how-to. First, I had to add -i eth1 to my "outside" rule (eth1 is my WAN connection). I also needed to add two others rules. Here in the end what I came with :
iptables -t nat -A PREROUTING -i eth1 -p tcp --dport 8080 -j DNAT --to 10.32.25.2:80
iptables -t nat -A PREROUTING -p tcp --dport 8080 -j DNAT --to 10.32.25.2:80
iptables -t nat -A POSTROUTING -p tcp -d 10.32.25.2 --dport 80 -j MASQUERADE
root@ESJC-HAHP-AS07S $ iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 3000 -j DNAT --to 172.17.0.134:3000
root@ESJC-HAHP-AS07S $ iptables -t nat -A PREROUTING -p tcp --dport 3000 -j DNAT --to 172.17.0.134:3000
root@ESJC-HAHP-AS07S $ iptables -t nat -A POSTROUTING -p tcp -d 172.17.0.134 --dport 3000 -j MASQUERADE
iptables -A INPUT -i eth0 -p tcp --dport 80 -j ACCEPT
## not if service is enable and port active -- >
iptables -A INPUT -i eth0 -p tcp --dport 8080 -j ACCEPT
iptables -A PREROUTING -t nat -i eth0 -p tcp --dport 80 -j REDIRECT --to-port 8080
To disable ipv6, you have to open /etc/sysctl.conf using any text editor and insert the following lines at the end:
net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
net.ipv6.conf.lo.disable_ipv6 = 1
If ipv6 is still not disabled, then the problem is that sysctl.conf is still not activated.
To solve this, open a terminal(Ctrl+Alt+T) and type the command,
sudo sysctl -p
You will see this in the terminal:
net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
net.ipv6.conf.lo.disable_ipv6 = 1
After that, if you run:
$ cat /proc/sys/net/ipv6/conf/all/disable_ipv6
It will report:
1
If you see 1, ipv6 has been successfully disabled.
$ sudo apt-get install vlan
$ sudo modprobe 8021q
$ vconfig add eth1.10
$ vconfig rem eth1.10
Removed VLAN -:eth1.10:-
$ ip a l eth1.10
Device "eth1.10" does not exist.
/etc/sysconfig/selinux
sestatus
1-Edit /etc/selinux/config and set the SELINUX variable to 'disabled'
If SELinux is disabled, then you should be able to do this:
find / -exec setfattr -x security.selinux {} \;
2-Use the setenforce command to disable on-the-fly
setenforce 0 'to disable
setenforce 1 'to enable
With solution 1, your changes are permanent but only effective if you reboot the machine.
With solution 2, your changes are NOT permanent but effective immediately.
Try the following:
grep -v -e '^$' foo.txt
The -e option allows regex patterns for matching.
The single quotes around ^$ makes it work for Cshell. Other shells will be happy with either single or double quotes.
UPDATE: This works for me for a file with blank lines or "all white space" (such as windows lines with "\r\n" style line endings), whereas the above only removes files with blank lines and unix style line endings:
grep -e -v '^[[:space:]]*$' foo.txt
#######################################################################################################
https://t37.net/how-to-fix-your-elasticsearch-cluster-stuck-in-initializing-shards-mode.html
for shard in $(curl -XGET http://localhost:9200/_cat/shards | grep UNASSIGNED | awk '{print $2}'); do
curl -XPOST 'localhost:9200/_cluster/reroute' -d '{
"commands" : [ {
"allocate" : {
"index" : "t37",
"shard" : $shard,
"node" : "datanode15",
"allow_primary" : true
}
}
]
}'
sleep 5
done
This is a common issue arising from the default index setting, in particularly, when you try to replicate on a single node. To fix this with transient cluster setting, do this:
curl -XPUT http://localhost:9200/_settings -d '{ "number_of_replicas" :0 }'
Next, enable the cluster to reallocate shards (you can always turn this on after all is said and done):
curl -XPUT http://localhost:9200/_cluster/settings -d '
{
"transient" : {
"cluster.routing.allocation.enable": true
}
}'
Now sit back and watch the cluster clean up the unassigned replica shards. If you want this to take effect with future indices, don't forget to modify elasticsearch.yml file with the following setting and bounce the cluster:
index.number_of_replicas: 0
# cat file |egrep -v "^#|^$"
pv -tpreb openelec_raspi_imagenio.img | dd of=/dev/disk1 bs=1m
| dd if=/dev/urandom | pv | dd of=/dev/null
pv -treb 2017-11-29-raspbian-stretch-lite.img | dd of=/dev/disk2 bs=1m && sync
To configure SSMTP, you will have to edit its configuration file (/etc/ssmtp/ssmtp.conf) and enter your account settings:
/etc/ssmtp/ssmtp.conf
# The user that gets all the mails (UID < 1000, usually the admin)
[email protected]
# The mail server (where the mail is sent to), both port 465 or 587 should be acceptable
# See also https://support.google.com/mail/answer/78799
mailhub=smtp.gmail.com:587
# The address where the mail appears to come from for user authentication.
rewriteDomain=gmail.com
# The full hostname
hostname=localhost
# Use SSL/TLS before starting negotiation
UseTLS=Yes
UseSTARTTLS=Yes
# Username/Password
AuthUser=username
AuthPass=password
# Email 'From header's can override the default domain?
FromLineOverride=yes
Note: Take note, that the shown configuration is an example for Gmail, You may have to use other settings. If it is not working as expected read the man page man 8 ssmtp, please.
Create aliases for local usernames (optional)
/etc/ssmtp/revaliases
root:[email protected]:smtp.gmail.com:587
mainuser:[email protected]:smtp.gmail.com:587
To test whether the Gmail server will properly forward your email:
$ echo test | mail -v -s "testing ssmtp setup" [email protected]
Reference: https://easyengine.io/tutorials/linux/ubuntu-postfix-gmail-smtp/
you can always set it up externally while starting elasticsearch:
$ elasticsearch -f -Des.config=<NewConfig>
Try the following:
grep -v -e '^$' foo.txt
The -e option allows regex patterns for matching.
The single quotes around ^$ makes it work for Cshell. Other shells will be happy with either single or double quotes.
UPDATE: This works for me for a file with blank lines or "all white space" (such as windows lines with "\r\n" style line endings), whereas the above only removes files with blank lines and unix style line endings:
grep -e -v '^[[:space:]]*$' foo.txt
If you want to delete lines 5 through 10 and 12:
sed -e '5,10d;12d' file
This will print the results to the screen. If you want to save the results to the same file:
sed -i.bak -e '5,10d;12d' file
This will back the file up to file.bak, and delete the given lines.
To delete line 5, do:
sed -i '5d' file.txt
For a variable line number:
sed -i "${line}d" file.txt
If the -i option isn't available in your flavor of sed, you can emulate it with a temp file:
sed "${line}d" file.txt > file.tmp && mv file.tmp file.txt
mdadm --assemble --uuid <uuid> /dev/md0
You can use Nmap's snmp-brute something like
nmap -sU -p161 --script snmp-brute --script-args snmplist=community.lst 192.168.1.0/24
As of version 1.1.7i1 Check_MK supports the option -II. It does exactly the same as -I but removes all existing checks before doing the inventory. Only those checks are affected that are being inventorized. Example 1:
root@linux# cmk -II df xyzsrv01
This first removes all checks of type df on host xyzsrv01 and then does inventory.
Example 2:
root@linux# cmk -II xyzsrv01
This removes all agent based of host xyzsrv01 before doing inventory.
You can even do a check_mk -II and thus reinventorize all agent based checks on all hosts - and removing all checks currently not found on the target hosts.
How to forward specific log file outside of /var/log with rsyslog to remote server?
Just setup an imfile rule in your /etc/rsyslog.conf
#/etc/rsyslog.conf
$ModLoad imfile
$InputFileName /data/mysql/error.log
$InputFileTag mysql-error
$InputFileStateFile stat-mysql-error
$InputFileSeverity error
$InputFileFacility local3
$InputRunFileMonitor
local3.* @@hostname:<portnumber>
This watches a file and saves to the local3 facility in syslog. Then you can send all data from the local3 facility to your remote server. You may also want to add the following to your rsyslog conf (usually /etc/rsyslog.d/50-default.conf on Ubuntu) to not save the local3 facility to /var/log/syslog:
#/etc/rsyslog.d/50-default.conf
*.*;auth,authpriv.none,local1.none,local2.none,local3.none,local4.none,local5.none,local6.none -/var/log/syslog
Additionally, I would encourage some reading from the following rsyslog docs for more advanced filtering:
http://www.rsyslog.com/doc/property_replacer.html
http://www.rsyslog.com/doc/rsyslog_conf_filter.html
!is:starred !is:important label:unread
Putting this in ~/.bashrc will apply @alvin's solution across different sessions as wlell
HISTCONTROL=ignoredups:erasedups
shopt -s histappend
PROMPT_COMMAND="history -n; history -w; history -c; history -r; $PROMPT_COMMAND"
Some time ago I used cron to do just that. You can make an entry like this
@reboot /path/to/my/script
More info here
Instead of the first five fields, one of eight special strings may appear:
string meaning
------ -------@reboot ------@reboot
@reboot Run once, at startup.
@yearly Run once a year, "0 0 1 1 *".
@annually (same as @yearly)
@monthly Run once a month, "0 0 1 * *".
@weekly Run once a week, "0 0 * * 0".
@daily Run once a day, "0 0 * * *".
@midnight (same as @daily)
@hourly Run once an hour, "0 * * * *".
Open your terminal and run
curl -sSL https://get.rvm.io | bash -s stable
When this is complete, you need to restart your terminal for the rvm to work.
Now, run rvm list known
This shows the list of versions of the ruby.
Now, run rvm install ruby-2.4.2
If you type ruby -v in the terminal, you should see ruby 2.4.2.
If it still shows you ruby 2.0., run rvm use ruby-2.4.2 --default.
$ hist rvm
$ curl -sSL https://get.rvm.io | bash -s stable
$ rvm list known
$ rvm install ruby-2.4.2
$ rvm use ruby-2.4.2 --default
RVM is not a function, selecting rubies with 'rvm use ...' will not work.
You need to change your terminal emulator preferences to allow login shell.
Sometimes it is required to use `/bin/bash --login` as the command.
Please visit https://rvm.io/integration/gnome-terminal/ for an example.
Warning! PATH is not properly set up, '/Users/jaci/.rvm/gems/ruby-2.4.2/bin' is not at first place.
Usually this is caused by shell initialization files. Search for 'PATH=...' entries.
You can also re-add RVM to your profile by running: 'rvm get stable --auto-dotfiles'.
To fix it temporarily in this shell session run: 'rvm use ruby-2.4.2'.
To ignore this error add rvm_silence_path_mismatch_check_flag=1 to your ~/.rvmrc file.
Warning, new version of rvm available '1.29.8-next', you are using older version '1.29.3'.
You can disable this warning with: echo rvm_autoupdate_flag=0 >> ~/.rvmrc
You can enable auto-update with: echo rvm_autoupdate_flag=2 >> ~/.rvmrc
$ bundle install
Downloading jekyll-3.6.3 revealed dependencies not in the API or the lockfile (kramdown (~> 1.14), rouge (< 3, >= 1.7)).
Either installing with `--full-index` or running `bundle update jekyll` should fix the problem.
In Gemfile:
github-pages was resolved to 155, which depends on
jekyll-avatar was resolved to 0.4.2, which depends on
jekyll
I was able to unistall jdk 8 in mavericks successfully doing the following steps:
Run this command to just remove the JDK
sudo rm -rf /Library/Java/JavaVirtualMachines/jdk<version>.jdk
Run these commands if you want to remove plugins
sudo rm -rf /Library/PreferencePanes/JavaControlPanel.prefPane
sudo rm -rf /Library/Internet\ Plug-Ins/JavaAppletPlugin.plugin
sudo rm -rf /Library/LaunchAgents/com.oracle.java.Java-Updater.plist
sudo rm -rf /Library/PrivilegedHelperTools/com.oracle.java.JavaUpdateHelper
sudo rm -rf /Library/LaunchDaemons/com.oracle.java.Helper-Tool.plist
sudo rm -rf /Library/Preferences/com.oracle.java.Helper-Tool.plist
log stream --predicate 'eventMessage contains "docker"'
%sudo ALL=(ALL) NOPASSWD:ALL
npm uninstall -g truffle
apt purge npm
curl -sL https://deb.nodesource.com/setup_8.x | sudo -E bash -
sudo apt-get install -y nodejs
npm i -g truffle
In this example we change uid and gid on user elasticsearch,
[root@elkm02 ~]# id elasticsearch
uid=997(elasticsearch) gid=995(elasticsearch) grupos=995(elasticsearch)
Currently has 997 for uid and 995 at group, we want to change so it matches other cluster users and will fix permissions for _snapshot directories on elasticsearch.
Remember to check before if those uid and gid numbers are already used by other user/groups
Change uuid
usermod -u 996 elasticsearch
Change gid
groupmod -g 994 elasticsearch
Find and change all file belongings to user-group
find / -uid 997 -exec chown elasticsearch {} \;
find / -gid 995 -exec chgrp elasticsearch {} \;
Follow these steps https://coderwall.com/p/v1agsg/installing-etckeeper-to-store-config-with-autopush-to-git-in-ubuntu-14-04-lts
First update the current version to the lastest packages.
apt-get update && apt-get -y upgrade && apt-get -y dist-upgrade
Reboot if you're able to, if not just go through editing sources.list.
$ sed -i /deb/s/jessie/stretch/g /etc/apt/sources.list
$ sed -i /deb/s/jessie/stretch/g /etc/apt/sources.list.d/*.list
After that, run again update, upgrade and dist-upgrade.
https://medium.com/@doronsegal/gpg-agent-is-older-than-x-e8860a383cb0
It seems like the version of the running gpg agent was different from the one pass was running (under the hood it’s GnuPG). In order to be able to read my password again I had to “kill” the running agent so the GnuPG could use the newer version (I was using -v for verbose mode).
gpgconf --kill -v gpg-agent
When using pass save passwords with this pattern in order to make firefox plugin work.
MyPassword
---
path / reference.com
username: username
password: MyPassword
url: http://www.example.com/path
curl -O https://storage.googleapis.com/golang/go1.11.2.linux-amd64.tar.gz
tar xvzf go1.11.2.linux-amd64.tar.gz
sudo mv go /usr/local/
export GOROOT=/usr/local/go
export GOPATH=$HOME/src/workspace
export PATH=$GOROOT/bin:$GOPATH/bin:$PATH
echo $GOROOT
echo $GOPATH
echo "export GOROOT=/usr/local/go" >> .bashrc
echo "export GOPATH=$HOME/src/workspace" .bashrc
echo "export PATH=$GOROOT/bin:$GOPATH/bin:$PATH" >> .bashrc
go version
- htop Provides a full list of processes running
- Glances System monitoring tool written in Python
- Conky Advanced, highly configurable system monitor for X based on torsmo
- nmon Performance monitoring tool
- atop Monitor for system resources and process activity
- gtop System monitoring dashboard for the terminal
- Linux Process Viewer Enables fine grained examination of processes
From imagemagick:
animate -pause *.jpg
You can also use mplayer:
mplayer mf://*.jpg -mf fps=10
#######################################################################################################