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sudo date MMDDHHmmYY
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du -ks * | sort -n -r
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Eclipse also offers column selection functionality similar to popular text editors Notepad++, Sublime Text2.
On a Mac, need to press "cmd + option + A"
On Windows and Linux, you need to press "alt + shift + A"
Please note doing above will take you to block selection mode, and you need to press same keys again to come back to normal mode.
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In absence of telnet we can use nc (which version??) to validate connectivity.
nc -w 2 -v 10.0.0.1 < /dev/null; exitCode=$?; echo "Exit code = $exitCode"; if [ $exitCode -ge 1 ]; then echo "No connectivity"; else echo 'SUCCESS!!!'; fi; >> fw_validation.txt
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For loop example in bash script:
To get yarn log files for multiple spark jobs, we can use this command.
for i in `cat appid.txt`; do echo $i; yarn logs -applicationId $i > sparkjob_01sep_logs/$i.log; echo "——"; done
For loop with sequence and ssh into multiple servers:
To login into multiple servers and run a command, we can use below command.
for i in `seq 101 125`;do ssh -q machinename$i "hostname;ls -ltr";done
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We can redirect all System.out.println output to a file with below code snippet.
System.setOut(new PrintStream(new BufferedOutputStream(new FileOutputStream("/tmp/output.txt"))));
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Open Automator
File > New
select Application
Then add "Run Shell Script" option
Give the command to run, here I am giving Google chrome canary with no proxy option
/Applications/Google\ Chrome\ Canary.app/Contents/MacOS/Google\ Chrome\ Canary --no-proxy-server=Then Save with the name you want.
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Disable proxy setting
Add command line parameter --no-proxy-server= to the command. (In windows, add this to the target path in the shortcut properties)
Specify different proxy
Add command line parameter --proxy-server="127.0.0.1:8080" to the command
Specify no proxy server list
Add command line parameter like this --proxy-bypass-list="127.0.0.1;localhost"
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You want to use a maven dependency and you also need to know about the license information. If it is only one dependency you can easily check it. But each maven dependency more dependencies itself to do its work. That means you have to find out license information of all those jars also.
For example, if you want to use cassandra-unit jar (https://github.com/jsevellec/cassandra-unit) you have to know the license of this jar and 41 other jars also. You see how painful it is. To use one jar you have to find out information of 41 jars, think if you want to use some 10 jars, how many more jars you need to check.
Here maven plugin maven-project-info-reports-plugin comes to the rescue. This plugin can find out all the information you need.
I followed below steps to solve my problem.
Step 1:
I have created a new maven project in the eclipse and added my dependency (cassandra-unit). Then I have added maven-project-info-reports-plugin in the reports section.
Now pom file looks like below.
Step 2:
Then run maven goal mvn project-info-reports:dependencies and it will create a html file at target/site/dependencies.html which gives you all the information you need.
You can see license details of the Maven site plugin
POM.XML
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.reddy</groupId>
<artifactId>SampleDependencies</artifactId>
<version>0.0.1-SNAPSHOT</version>
<dependencies>
<dependency>
<groupId>org.cassandraunit</groupId>
<artifactId>cassandra-unit</artifactId>
<version>2.2.2.1</version>
</dependency>
</dependencies>
<reporting>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-project-info-reports-plugin</artifactId>
<version>2.6</version>
</plugin>
</plugins>
</reporting>
</project>
If you have ever wanted to show a list of subdirectories underneath
the current directory while at the terminal prompt, there’s a simple
command that can help.
Simply run the following command from the bash terminal prompt, which filters the file listing to only show folders:
ls -l | grep ^d
Since typing that whole command every time you want to show a list of
directories might get a little tiring, you can use the alias feature to
assign it to something you can more easily remember:
alias lsd="ls -l | grep ^d"
Now when you type “lsd” at the prompt, you will see a list containing
only the directories, which can be very useful when you are trying to
navigate through a messy set of folders.
J – to join two lines
Deletion
dl – single character, dw – Single word, dd – single line, d$ – to the end of the line
Editing
i – insert mode, A – append to the end of the line, o – insert in next line
Misc
:set list – to see special characters
:%s/str1/str2/g – search and replace
$$ = The PID number of the process executing the shell.
$? = Exit status variable.
$0 = The name of the command you used to call a program.
$1 = The first argument on the command line.
$2 = The second argument on the command line.
$n = The nth argument on the command line.
$* = All the arguments on the command line.
$# The number of command line arguments.
Since you don't want password to be not displayed on terminal you need to disable echo before reading password. Once password is read you need to enable it again.
#————————————————————
# Read Password
#————————————————————
/usr/ucb/echo -n “Please Enter Password For User ${SUSER}: “
stty -echo
read SPSWD
stty echo
clear
1. Go to Session: enter site name, port, etc…
2. Window > Behaviour : Window Title can be set here.
3. Connection > Data: User name should be given Auto-login username.
4. Connection > SSH : check Enable Compression.
5. Connection > SSH > Tunnels: enter local port number in Source Port, the port to be forwarded in Destination in the form
For MySQL client, this local port will be the port and localhost will be the machine.
Create windows short cut for this.
1. Create a short cut for PuTTY and change its command like below.
C:\Users\user\Desktop\putty.exe -ssh -pw
Source: http://www.jfitz.com/tips/putty_config.html
I was trying to do a recursive search in Unix using find command and then copy all those files to a specific folder.
I found below command does that.
find . -name *2011-03-19* -exec cp {} /home/Reddy/logs/ \;
Important thing is, we need to escape the ending semi-colon.
{} is the place holder for putting the search result, i.e., the file name found.
If you got a virus usually it will disable the following things so that you can't be able to delete the virus.
It will disable Folder Options menu item from View menu, disables the Task Manager, and disables the Registry Editor.
You can enable all these from the Group Policy editor by yourself manually.