Category Archives: Operating System

Using grep as highlighter

Posted on December 18, 2015 by ronaldpringadi

1$ grep –color -E ‘^|pattern1|pattern2’ file name

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TCL programming

Posted on November 12, 2015 by ronaldpringadi

A reusable expect dispatcher I kept around for running the same kind of operation across a list of servers — untar an index, restart a service, patch a config file. The trick is that the script reads the first command-line … Continue reading →

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Simple unit test is bash file

Posted on October 28, 2015 by ronaldpringadi

Consider the following 3 files: 1. shellTestFramework.sh 1234567891011121314151617181920212223242526272829303132333435363738394041424344454647#!/bin/bash # Copyright (c) Ronald Pringadi # Before each Test function setUpTest(){     #"Please overwrite this function on your unit test. Something that need to be done before each test"     … Continue reading →

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Compare File Permission Recussively on Linux Directories

Posted on August 13, 2015 by ronaldpringadi

Scan 12345678910111213141516171819202122#!/usr/bin/perl use File::Find; my $directory1 = ‘/root/rpmbuild/RPMSX’; my $directory2 = ‘/root/rpmbuild/RPMSX.bak’; find(\&hashfiles, $directory1); sub hashfiles {   my $file1 = $File::Find::name;   (my $file2 = $file1) =~ s/^$directory1/$directory2/;         return(0) if (! -f $file2) ;   … Continue reading →

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Linux find files and total their size

Posted on July 22, 2015 by ronaldpringadi

1find ./ -type f -newerct "1 May 2015" ! -newerct "1 Jul 2015" -print0 | du –files0-from=- -hc| tail -n1

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Wireshark filters

Posted on June 22, 2015 by ronaldpringadi

Filter by ip dst or source using wildcard on the last 3 digits: (ip.dst == 192.168.0.0/24) || (ip.src == 192.168.0.0/24)

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Allowing a linux/unix user all sudo access without password

Posted on December 15, 2014 by ronaldpringadi

/etc/sudoers yourusername ALL=(ALL) NOPASSWD:ALL

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Solaris Notes

Posted on December 7, 2014 by ronaldpringadi

Extracting a solaris package without installing it. #http://serverfault.com/questions/287469/extract-files-out-of-solaris-pkg-file-without-installing pkgtrans filename.pkg /home/user/temporary_package_prefix

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Find with xargs

Posted on October 20, 2014 by ronaldpringadi

Search all files under current directory, look for xml node ‘‘, copy and print that node. Send the output to a file. find . |xargs -n1 xmlstarlet sel -t -c “//processorInfo[@ruleType=’store’]” 2>/dev/null > /cygdrive/b/allstore.txt

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XMLStartlet – Command line xml queries

Posted on October 20, 2014 by ronaldpringadi

xmlstarlet sel -t -c “//YOUR_NODE_ELEMENT_TAG_NAME[@ATTRIBUTE_NAME=’ATTRIBUTE_VALUE’]” YOUR_XML_FILE.xml

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