\HAPbookmark{}{section.0.1}{Aim}{2}{section.0}
\HAPbookmark{}{section.0.2}{Why Shell Scripting?}{3}{section.0}
\HAPbookmark{}{section.0.3}{Where to get more information}{4}{section.0}
\HAPbookmark{}{section.0.4}{The Shell is an Interpreter}{5}{section.0}
\HAPbookmark{}{section.0.5}{The Shebang}{6}{section.0}
\HAPbookmark{}{section.0.6}{Making the script executable}{7}{section.0}
\HAPbookmark{}{section.0.7}{Special Characters}{8}{section.0}
\HAPbookmark{}{section.0.8}{Special Characters---continued: 2}{9}{section.0}
\HAPbookmark{}{section.0.9}{Special Characters---continued: 3}{10}{section.0}
\HAPbookmark{}{section.0.10}{Quoting}{11}{section.0}
\HAPbookmark{}{section.0.11}{Quoting---2}{12}{section.0}
\HAPbookmark{}{section.0.12}{Quoting---When to use it?}{13}{section.0}
\HAPbookmark{}{section.0.13}{True and False}{14}{section.0}
\HAPbookmark{}{section.0.14}{Variables---1}{15}{section.0}
\HAPbookmark{}{section.0.15}{Variables---Assignments}{16}{section.0}
\HAPbookmark{}{section.0.16}{Variables---Local to Script}{17}{section.0}
\HAPbookmark{}{section.0.17}{Variables---Unsetting Them}{18}{section.0}
\HAPbookmark{}{section.0.18}{Command-line Parameters}{19}{section.0}
\HAPbookmark{}{section.0.19}{Special Built-in Variables}{20}{section.0}
\HAPbookmark{}{section.0.20}{Variables: use Braces \texttt  {\$\{\dots  \}}}{21}{section.0}
\HAPbookmark{}{section.0.21}{Braces and Parameters after \textbf  {\$9}}{22}{section.0}
\HAPbookmark{}{section.0.22}{More about Quoting}{23}{section.0}
\HAPbookmark{}{section.0.23}{Command Substitution}{24}{section.0}
\HAPbookmark{}{section.0.24}{Command Substitution---Example}{25}{section.0}
\HAPbookmark{}{section.0.25}{Conditions---String Comparisons}{26}{section.0}
\HAPbookmark{}{section.0.26}{Conditions---Integer Comparisons}{27}{section.0}
\HAPbookmark{}{section.0.27}{Conditions---File Tests, NOT Operator}{28}{section.0}
\HAPbookmark{}{section.0.28}{Conditions---Combining Comparisons}{29}{section.0}
\HAPbookmark{}{section.0.29}{Arithmetic Assignments}{30}{section.0}
\HAPbookmark{}{section.0.30}{Arithmetic Expressions with \texttt  {\$((\dots  ))}}{31}{section.0}
\HAPbookmark{}{section.0.31}{Arithmetic Conditions with \texttt  {((\dots  ))}}{32}{section.0}
\HAPbookmark{}{section.0.32}{\texttt  {if} Statement}{33}{section.0}
\HAPbookmark{}{section.0.33}{\texttt  {while} Statement}{34}{section.0}
\HAPbookmark{}{section.0.34}{\texttt  {for} Statement}{35}{section.0}
\HAPbookmark{}{section.0.35}{\texttt  {for} Loops: Another Example}{36}{section.0}
\HAPbookmark{}{section.0.36}{\texttt  {for} Loops: second, C-like syntax}{37}{section.0}
\HAPbookmark{}{section.0.37}{\texttt  {break} and \texttt  {continue}}{38}{section.0}
\HAPbookmark{}{section.0.38}{Blocks: \texttt  {\{\dots  \}}}{39}{section.0}
\HAPbookmark{}{section.0.39}{Error Handling: \texttt  {\textbar \textbar }, \texttt  {\&\&} and \texttt  {exit}}{40}{section.0}
\HAPbookmark{}{section.0.40}{Output: \texttt  {echo} and \texttt  {printf}}{41}{section.0}
\HAPbookmark{}{section.0.41}{Input: the \texttt  {read} Command}{42}{section.0}
\HAPbookmark{}{section.0.42}{\texttt  {set}: Splitting a Multi-Word Variable}{43}{section.0}
\HAPbookmark{}{section.0.43}{More about \texttt  {set}, and \texttt  {IFS}}{44}{section.0}
\HAPbookmark{}{section.0.44}{Example: Changing \texttt  {IFS}}{45}{section.0}
\HAPbookmark{}{section.0.45}{\texttt  {case} Statement}{46}{section.0}
\HAPbookmark{}{section.0.46}{\texttt  {case} Statement: Example}{47}{section.0}
\HAPbookmark{}{section.0.47}{\texttt  {shift}: Move all Parameters Up}{48}{section.0}
\HAPbookmark{}{section.0.48}{\texttt  {shift}: Many Places}{49}{section.0}
\HAPbookmark{}{section.0.49}{Command-Line Options---1}{50}{section.0}
\HAPbookmark{}{section.0.50}{Command-Line Options---2}{51}{section.0}
\HAPbookmark{}{section.0.51}{Command-Line Options---3}{52}{section.0}
\HAPbookmark{}{section.0.52}{\texttt  {getopts}: Command-Line Options---4}{53}{section.0}
\HAPbookmark{}{section.0.53}{\texttt  {getopts}: Command-Line Options---5}{54}{section.0}
\HAPbookmark{}{section.0.54}{Temporary Files: \texttt  {mktemp}}{55}{section.0}
\HAPbookmark{}{section.0.55}{Signals that may Terminate your Script}{56}{section.0}
\HAPbookmark{}{section.0.56}{Signals: \texttt  {trap}}{57}{section.0}
\HAPbookmark{}{section.0.57}{Signals: \texttt  {trap} Example}{58}{section.0}
\HAPbookmark{}{section.0.58}{Functions}{59}{section.0}
\HAPbookmark{}{section.0.59}{Parameters in Functions}{60}{section.0}
\HAPbookmark{}{section.0.60}{Example, Calling a Function}{61}{section.0}
\HAPbookmark{}{section.0.61}{Debugging Shell Scripts---1}{62}{section.0}
\HAPbookmark{}{section.0.62}{Debugging Shell Scripts---2}{63}{section.0}
\HAPbookmark{}{section.0.63}{Writing Shell Scripts}{64}{section.0}
\HAPbookmark{}{section.0.64}{Useful External Programs---1}{65}{section.0}
\HAPbookmark{}{section.0.65}{Useful External Programs---2}{66}{section.0}
\HAPbookmark{}{section.0.66}{Regular Expressions}{67}{section.0}
\HAPbookmark{}{section.0.67}{What is in a Regular Expression?}{68}{section.0}
\HAPbookmark{}{section.0.68}{Literal characters}{69}{section.0}
\HAPbookmark{}{section.0.69}{Character Classes: \texttt  {[\dots  ]}}{70}{section.0}
\HAPbookmark{}{section.0.70}{Negated Character Classes: \texttt  {[\textasciicircum \dots  ]}}{71}{section.0}
\HAPbookmark{}{section.0.71}{Match Any Character}{72}{section.0}
\HAPbookmark{}{section.0.72}{Matching the Beginning or End of Line}{73}{section.0}
\HAPbookmark{}{section.0.73}{Match Repetitions: \texttt  {*}, \texttt  {?}, \texttt  {+}, \texttt  {\{n\}}, \texttt  {\{n,m\}}}{74}{section.0}
\HAPbookmark{}{section.0.74}{Matching Alternatives: ``\texttt  {\textbar }''}{75}{section.0}
\HAPbookmark{}{section.0.75}{Putting it All Together: Examples}{76}{section.0}
\HAPbookmark{}{section.0.76}{Basic \texttt  {awk}}{77}{section.0}
\HAPbookmark{}{section.0.77}{What Does \texttt  {awk} Do?}{78}{section.0}
\HAPbookmark{}{section.0.78}{\texttt  {awk} Examples}{79}{section.0}
\HAPbookmark{}{section.0.79}{\texttt  {sed}---the Stream Editor}{80}{section.0}
\HAPbookmark{}{section.0.80}{\texttt  {sed}---Backreferencees}{81}{section.0}
\HAPbookmark{}{section.0.81}{\texttt  {sed}---Backreferencees: Example}{82}{section.0}
\HAPbookmark{}{section.0.82}{\texttt  {find} Examples}{83}{section.0}
\HAPbookmark{}{section.0.83}{Finding SUID Programs}{84}{section.0}
\HAPbookmark{}{section.0.84}{A \texttt  {find} Example with Many Options}{85}{section.0}
\HAPbookmark{}{section.0.85}{\texttt  {rpm} Database Query Commands}{86}{section.0}