apple mac os x HowTo - Linux / Unix Q & A from nixCraft

How to secure and lock down Apple OS X 10.11 (El Capitan) with osxlockdown

December 30, 2015December 31, 2015in Mac OS X, Security, UNIX last updated December 31, 2015

Is there is an easy way to audit and lock down (secure) Apple OS X 10.11 (El Capitan) unix operating system?

How To Update Apple OS X Using Command Line Software Update Tool

October 26, 2015October 26, 2015in BASH Shell, Mac OS X, Package Management, UNIX last updated October 26, 2015

How do I install software updates from the command line tool on my Apple Mac OS X computer? How can I remotely update my Apple computer by just sshing into a system? Is there is something like apt-get command or yum command for Apple OS X?

Unix: Find Directory Name From Path

April 7, 2014in BASH Shell, KSH Shell, Linux, UNIX last updated April 7, 2014

I am a new Unix shell programer. How can I extract the directory name from a full path (say /nas01/data/backups/file.tar.gz)? How do I get directory name from its path on a Linux or Unix-like system?

Bash History: Correct / Repeat The Last Command With a Substitution

August 12, 2012February 23, 2016in BASH Shell, Linux, UNIX last updated February 23, 2016

I often type the wrong command as follows under Linux bash shell:

rsync -av dir1 user@server1.cyberciti.biz:/path/to/dir1

cp -av file1*.txt file2*.txt /path/to/dest

I need to correct those command as follows:

rsync -av dir5 user@server1.cyberciti.biz:/path/to/dir1 cp -av delta1*.txt delta2*.txt /path/to/dest

How do I replace dir1 with dir5 or file with delta and repeat the last command under bash shell?

Linux / Unix: lftp Command To Mirror Files and Directories

August 5, 2012April 1, 2017in BASH Shell, CentOS, Debian / Ubuntu, FreeBSD, Linux, RedHat and Friends, UNIX last updated April 1, 2017

How do I mirror files from remote FTP server using lftp command? How do put the entire directory from a local disk to a remote FTP server (reverse mirror) using lftp command under Linux and Unix like operating systems?

Apple OS X: Remove a Symbolic Link (Symlink) Command

May 4, 2012May 4, 2012in Mac OS X last updated May 4, 2012

How do I remove a symlink under Apple Mac OS X using bash command line option?

Unix / Linux: Find Information About The Process Including All Command Line Parameters

March 28, 2012March 28, 2012in Linux, UNIX last updated March 28, 2012

I‘m using ps command to read a snapshot of the current processes under Unix / Linux operating systems. However, ps -e or ps aux only displays command / processes names. I need to see complete information about the process including all parameters passed to it. How do I see it under Unix / Linux using ps command?