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Shell Script – Delete Old Files
For housekeeping the backup files on a server, we can write a shell script to remove files which were created some days ago and scheduled it by cron job. The following code is an example to remove...
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Shell Script – stat
Usually, we have to manipulate the file time attributes in the shell script in order to complete the task. Just like the example at Shell Script – Delete Old Files # Delete backup files which are more...
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Shell Script – Check Empty Folder
I am working on a housekeeping shell script to delete old files and update some files. I want to know whether the .sh is completed without problem. So i made a checking part in the shell script. The...
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Shell Script – Check the existence of files which have common file name
Except checking whether the folder is empty or not, i would also like to know whether the *.log files are removed. Here is another example. #!/bin/sh # Read a folder path from user input and check if #...
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Shell Script – Check if a file is updated
In the housekeeping shell script, i would update some files. The following example will try to update the /tmp/test file and display the result. #!/bin/sh # Update /tmp/test and check whether it is...
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Java – Date validation using SimpleDateFormat
I need to write a program which reads a date string. The program then archives all the data on the server with the input date as an cut off date. The following java program is based on the tutorial in...
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Dialog – Create a Simple Menu for Inexperienced Linux Users
Recently, i have a new task which is adding a user account on a Linux box with UI login shell. My project leader suggests a few tools for me to study and finally i pick the the one called pdmenu....
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Maven – Start Jetty Server by Ant task using maven-antrun-plugin
I have the following shell script to start the Jetty Server in my portable web application in Windows. start_jetty.bat start java -DSTOP.PORT=8080 -DSTOP.KEY=stop_jetty -jar start.jar EXIT It will...
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Mac – Show Hidden Files in Finder
By default Finder would not show hidden files. Use the following commands to change this setting. defaults write com.apple.finder AppleShowAllFiles TRUE killall Finder If you want to revert the...
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Shell – Redirect output to file with datetime as filename
This is an example shell script which creates a file with datetime as filename. eureka.sh #!/bin/bash echo "Eureka!" > eureka.$(date '+%Y-%m-%d').txt The file is created. Done =) Reference:...
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Shell Script – Check file owner and other attributes
Here is a simple shell script which would read a user input and return you the owner and group of the input path. check_owner_and_group.sh #!/bin/sh echo "Please enter a file/folder path:" read...
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Jenkins – Get the build user name in job config
I would like to get the username who triggered the Jenkins job in the Post build task. At first i thought the Build User Vars Plugin could work but than i realize those variables are only available in...
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Submit Google Forms by curl command
Google Forms is a very common way to collect user data nowadays. After you have created the form, you could insert it to your web site and present it with your own style. Other than that, we could...
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Shell – String replace
Previously we talked about how to submit a Google Form by the curl command. Submit Google Forms by curl command In the url, we have to encode the special characters such as whitespace. In shell...
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