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Bash Shell Programming HowTos

Tutorials, howtos and programming tips about GNU Bourne-Again SHell (BASH) for Apple OS X, Linux, *BSD and Unix like operating systems. ( rss feed )

Unix: Find Directory Name From Path

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?
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Linux/Unix: Find Command Ignore Case Insensitive Search

I am a new Linux and Unix-command line user. I am using find command to search file called “fooBar.conf.sample” in my home directory. I do not know the case, it could be uppercase, lowercase, or a mix of both. How can search a file and ignore case on a Linux or Unix-like system?
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Minify and Compress CSS & Javascript Files At a Linux/Unix Shell Prompt

How do I minify and compress CSS & JS files on Linux or Unix-like system using shell prompt on my server? How can I minify JavaScripts and stylesheets at shell promot so they can download faster over the Internet without using any online tools?
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Explain: {,} in cp or mv Bash Shell Commands

I often see commands as follows posted on blog or forums

cp /etc/httpd/httpd.{,.bakup}

OR

mv resume{z,}.doc

What is the purpose of {,} in Linux and Unix shell commands?
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Ubuntu Copy File Command

I‘m a new Ubuntu Linux user. This seems like a newbie question, but I can not seem to find examples to copy files on Ubuntu. How do I copy file to another directory on Ubuntu Linux using command line terminal application? How can I copy files via terminal on Ubuntu Linux desktop?
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Unix / Linux: Check New Files In File System /var/www/uploads/

Recently, I switched from MS-Windows based web-server to CentOS Linux based Apache web-server. All user uploaded files are stored in /var/www/uploads/ directory. Is there command that can give me a list of files that have been added to the filesystem at /var/www/uploads/ in last 7 days on Linux/Unix-like oses?
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Linux / Unix: whereis Command Examples

whereis command

I am a new Linux and Unix-like system command line user. How do I find and locate the binary, source, and manual page files for a given command?
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Mac OS X: Install wget Network Downloader Utility

I recently learned that “wget” can continue getting a partially-downloaded (resume download) file. I am unable to find wget command on Mac OS X. How do I install install wget on Mac OS X (Mountain Lion/ Mavericks / Snow Leopard)? How can I install wget in Mac OS X without 3rd-party repo such as Homebrew or MacPorts?
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What Does –– (double dash) Mean In SSH Shell Command?

I see lots of seasoned admins and cloud provider wrapper scripts use ssh client command as follows in shell:

ssh nixcraft@server1.cyberciti.biz --

What the double -- (dash) does here? Why it is used in this shell command and why not just use the following?

ssh nixcraft@server1.cyberciti.biz
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HowTo: Unpack .tgz File On a Linux

I am a new Linux user. I am having problem with the Terminal. How do I unpack .tgz (tar.gz) file on a Linux using command line option?
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