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

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

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

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

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

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

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

last updated February 23, 2016 in BASH Shell, Linux, UNIX

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

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

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

last updated May 4, 2012 in Mac OS X

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

last updated March 28, 2012 in Linux, UNIX

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?