Tag Archives: Mac OSX

grep lines having a text string from compressed files

The log of an application in my job is archived in a file, 1 file per day. I was requested to extract the activity of one client from these logs for the whole August, i.e., from 31 compressed files.

I placed all compressed log files into a folder called /database and I created a file zgrep_all.sh to search and extract the log lines of my client. (If your *.gz  files are located somewhere else then pay attention to line 11 of tje script and modify it properly)


# author: tomeu.mir
# filename: zgrep_all.sh
# desc  : search string in all *gz files and spools the output to a file
# usage : . zgrep_all.sh <search string> <output filename>

for f in database/*.gz
  now=$(date +”%Y/%m/%d %T”)
  echo “[$now] Processing $f file with search string $search_string and output file $output_file”   
  zgrep -i “$search_string” $f >>  $output_file
now=$(date +”%Y/%m/%d %T”)
echo “[$now] done.”

Finally I executed the following:

$ . zgrep_all.sh MYCLIENTNAME output.log

How to install Oracle SQLPlus and Oracle Client in MAC OS


The How To has been extracted from the following link: http://www.joelennon.ie/2014/02/06/installing-oracle-instant-client-mac-os-x/

I just skipped some text and modified some paths to adapt it to oracle client release.


1. Download the files from the Oracle Site


Be sure to grab the following two files:

  • Instant Client Package – Basic
  • Instant Client Package – SQL*Plus

2. Extract the files and create the proper folder structure.

Open a Terminal window and unzip the downloaded files.

$ unzip -qq instantclient-basic-macos.x64-

$ unzip -qq instantclient-sqlplus-macos.x64-

Note: The -qq flag will tell the unzip utility to run in quieter mode, preventing any output from being displayed on the screen.

By default, the archive will extract all these files to a single directory. Instead, we’ll create a nicely structured directory to keep these files in your user Applications folder.

$ mkdir -p /Applications/oracle/product/instantclient_64/

$ mkdir -p /Applications/oracle/product/instantclient_64/

$ mkdir -p /Applications/oracle/product/instantclient_64/

$ mkdir -p /Applications/oracle/product/instantclient_64/

$ mkdir -p /Applications/oracle/product/instantclient_64/

$ mkdir -p /Applications/oracle/product/instantclient_64/

Next, move the files over to these directories as follows:

$ cd instantclient_11_2

$ mv ojdbc* /Applications/oracle/product/instantclient_64/

$ mv x*.jar /Applications/oracle/product/instantclient_64/

$ mv glogin.sql /Applications/oracle/product/instantclient_64/

$ mv *dylib* /Applications/oracle/product/instantclient_64/

$ mv *README /Applications/oracle/product/instantclient_64/

$ mv * /Applications/oracle/product/instantclient_64/

3. Create a proper tnsnames.ora file to define proper connection strings

Copy or create a tnsnames.ora file to /Applications/oracle/product/instantclient_64/


Create the tnsnames.ora file with the vi editor, paste the following lines and save it.











    )  )

(You can better ask to a DBA to review the content of this file and ask her to provide you with a proper test connection)

4. Set up environment variables

Edit or create a file .bash_profile

$ cd /Users/UserName

$ vi ~/.bash_profile

if you haven’t created a .bash_profile before the file will be empty, otherwise just add the following lines to the end of the existing file.

export ORACLE_HOME=/Applications/oracle/product/instantclient_64/



To load this profile, run the following command:

$ source ~/.bash_profile

Assuming you have set up your tnsnames.ora file correctly, you should now be able to connect one of the databases as follows:

5. Start using SQLPlus

$ sqlplus username/password@database

6. Did you enjoy? That’s all folks.



Fixing command history for using SQLPlus line edition with arrow keys

If you have used the command-line SQLPlus in a Windows environment, you will probably be used to using the command history to execute previous SQL statements using the arrow keys. One thing you’ll notice in SQLPlus for the Mac is that this doesn’t work by default, if you hit the up key you’ll see a strange character sequence ^[[A rather than the previous command. Let’s go ahead and fix this now.

To do this, you’ll need to use rlwrap. You could download this from source and build it yourself, but I find it much easier to use the fantastic brew package manager for Mac OS X. Head over to http://brew.sh/ and follow the instructions to install and set up Homebrew (it’s very easy). With Homebrew installed, you can now easily install rlwrap on your system with one command:

$ ruby -e “$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)”

$ brew install rlwrap

The final thing you need to do is tell your system to use rlwrap whenever you use SQL*Plus. To do that, you’ll need to edit your .bash_profile file again.

$ vi ~/.bash_profile

Add the following line to the end of the file.

alias sqlplus=’rlwrap sqlplus’

Now reload the .bash_profile:

$ source ~/.bash_profile

Now, when you launch SQL*Plus and try to use the arrow keys to access previous commands, it will work.