UNIX Shells by Example (4th Edition)
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a command 2nd access permissions [See also permissions] user and group identification actions awk awk simple action example patterns and addressing 2nd alias substitution backslashes when defined aliases Bash C shell command type evaluation order creating Bash C shell Korn shell debugging and sneaky aliases defined deleting Bash Korn shell TC shell error messages, creating with functions and Korn shell Korn shell listing Bash C shell Korn shell TC shell ampersand awk background jobs sed appending arrays and subscripts C shell extensions to variables output to an existing file sed apropros utility arch utility arguments Bash Bourne shell C shell command line gawk nawk function arguments and return value invocation Korn shell argv ARGV array and nawk positional parameters 2nd arithmetic [See also increment, decrement] awk Bash 2nd bc utility Bourne shell 2nd built-in functions C shell 2nd expansion floating-point Bash Bourne shell C shell Korn shell 2nd let command arithmetic operators awk 2nd C shell arrays awk 2nd Bash 2nd Bourne shell C shell 2nd declare -a command Korn shell 2nd 3rd set -A command set command shift command C shell Korn shell strings, C shell assignment operators 2nd associativity and C shell asterisk metacharacter Bash Bourne shell C shell egrep GNU GNU egrep GNU grep grep Korn shell sed at utility authentication awk data validation program init process autolist variable defined example 2nd TC shell autoloaded functions in Korn shell awk $0 variable -f option action example actions arithmetic operators 2nd arrays 2nd assignment operators 2nd BEGIN patterns 2nd commands from within a file commands in script file comparison expressions 2nd compound patterns computation conditional expressions conditional operators conditional statements 2nd constants data validation sample program decrement operators defined END patterns 2nd equality testing fields input field separators separators fields, empty files, closing fixed fields form letters FS variable functions built-in 2nd 3rd random number generator string 2nd functions, integer getline function how it works increment operators input field separators input from commands input from files input redirection 2nd logical operators loops 2nd match operator metacharacters negation operator NF variable nf variable NR variable OFMT variable OFS variable operators decrement increment options on command line origin output formatting redirection 2nd pattern matching example patterns 2nd patterns, defined pipes 2nd 3rd pipes, closing 2nd pipes, opening print function printf function 2nd printing program control statements 2nd random number generator range operators range patterns record separator records records, multiline redirection regular expression metacharacters regular expressions 2nd matching on an entire line pattern and action combination relational operators 2nd review and example scripting shell interaction split function system function tilde operator utility variables 2nd built-in 2nd constants field initialization user-defined 2nd
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