Category Archives: Linux

You got to love Linux. Not only that it is free, but it is also very strong, stable, and widely used.

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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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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Bash Scripting templates

Posted on October 6, 2014 by ronaldpringadi

1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859# ========================== # Bash tips # ========================== # Run bash by $ /bin/bash scriptname.sh $ /bin/bash scriptname.sh +x  # debug mode # Or put the next line on the 1st line of your file. #!/bin/bash -x ## Double round braket … Continue reading →

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