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Add Current PATH to crontab Are you sick of your cron job failing because you are not explicitly listing the full path of everything in your shell script? Here’s how to fix it! Problem Your script works when you run it from the console but fails in cron. Cause Your crontab doesn’t have the right . . . → Read More: Add Current PATH to crontab How to create a bash script that deletes itself This script will delete itself via the shred command (secure deletion) when it exits #!/bin/bash # # Author: Steve Stonebraker # Date: August 20, 2013 # Name: shred_self.sh # Purpose: securely self-deleting shell script # http://brakertech.com/self-deleting-bash-script currentscript=$0 # function that is called when the script exits . . . → Read More: self deleting bash script Recently I needed to calculate the starting and ending memory addresses of an IOS application (in order to dump it). As a result i needed to figure out how to add two hex addresses. Here’s what I discovered. Basic Example In this case we are adding 0x4f000 and 0×2000 $ printf “0x%X\n” $(( 0x4f000+0×2000 )) . . . → Read More: Howto Add Hex Numbers via Command Line Here’s my bash cheat sheet: Tests Combining [ condition ] && action; # action executes if condition is true. [ condition ] || action; # action executes if condition is false. Filesystem related tests We can test different filesystem related attributes using different condition flags as follows: [ -f $file_var ]: Returns true if the . . . → Read More: Bash Cheat Sheet Goal: Whitelist an Entire Country with ipset For this article i’ll be referencing the github repository I set up at https://github.com/ssstonebraker/braker-scripts/tree/master/working-scripts/ipset We have a few files there, specifically: * cidr_to_ipset.sh (a script to create an ipset ruleset) * Some example CIDR blocks for Italy (IT.txt), Spain (ES.txt), Great Britian (GB.txt), USA (US.TXT) * sample_firewall.txt (example . . . → Read More: Whitelist Entire Country with ipset To make Mongo DB SSL on Ubuntu 12.04 you need to either purchase it or compile from source. To make compiling from source easy here’s a script to help you out! Mongo Compile SSL from Source Script Note: Make sure you are not running an EC2 Small instance or you will run out of space! . . . → Read More: Howto make Mongo SSL on Ubuntu 12.04 Recently I tried passing a bash variable to perl command in bash script, it didn’t end well. Troy Engel from http://tacticalvim.wordpress.com/ was nice enough to point out the issue: use sed instead of perl for what you need; it’s simpler, faster and uses the bash variables easily. I set up a test script /home/someuser/test.sh to show: . . . → Read More: passing bash variable to perl command in bash script Goal: Update wordpress post with PHP cli < ?php $con = mysql_connect("localhost","root","[redacted]"); if (!$con) { echo "Unable to connect to DB: " . mysql_error(); exit; } if (!mysql_select_db("wordpress")) { echo "Unable to select mydbname: " . mysql_error(); exit; } $myfileText = mysql_real_escape_string(file_get_contents('./code_for_wordpress.html',true)); $sql = "UPDATE `[your_instance_prefix]_posts` SET `post_content` = '$myfileText' WHERE `ID` like '1397';"; $result . . . → Read More: php mysql update variable Objective: Prep dev httpd.conf for production Tasks: Remove jenkins virtual host entry (which starts with a comment line “#Start Jenkins”) Replace .dev with nothing (ex: www.dev.example.com becomes www.example.com) Replace debug with error (ex: Loglevel debug becomes Loglevel error) Sed to remove lines after match In this example we will use sed delete all lines after . . . → Read More: sed delete all lines after To manually update the CDN Sync Tool table (for wordpress plugin CDN Sync Tool) try this MySQL Insert Statement: Replace the id with the latest id on your table Manually insert row to cdn sync table INSERT INTO `wordpressdb`.`prefix_cst_new_files` (`id`, `file_dir`, `remote_path`, `changedate`, `synced`) VALUES (1567,’/full/path/to/file/filename.txt’,'filename.txt’,’1345062888′,’1′); To confirm your work: SELECT * FROM `wordpressdb`.`prefix_cst_new_files` where . . . → Read More: mysql insert cdn sync tool |
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