bourne shell programming

Shell script programming (merge and sort) and shell script Programming #! /Bin/bash # shell script sort by merging a = (1 3 5 7 9) B = (2 4 6 8 10 12 14) c = n = 5 m = 7i = 0j = 0 k = 0 while [$ I-lt $ n-a $ j-lt $ m]; doif test $ {a [$ I]}-gt $ {B [$ j]}; thenc [$ k] =$ {B

I. Super tools Terminals, xterms, and shells shell are a full-featured programming environment. The background knowledge is as follows.DEC launched a small PDP-11, known as mini) and a low price of 10000 $), caused a huge response in the university. For ease of transplantation, in 1969, Ken Thompson began to write the first line of code that became opposite to Unix and MULTICS. Later, Dennis Ritchie designe

From the programmer's point of view, the shell itself is a program written in C language, from the user's point of view, the shell is the user and the Linux operating system communication Bridge. The user can either enter command execution or use shell scripting to do more complicated operations. In the increasingly perfect Linux GUI today, in the field of system

Http://www.cnblogs.com/suyang/archive/2008/05/18/1201990.htmlFrom the programmer's point of view, the shell itself is a program written in C language, from the user's point of view, the shell is the user and the Linux operating system communication Bridge. The user can either enter command execution or use shell scripting to do more complicated operations. In the

From the programmer's point of view, the shell itself is a program written in C language, from the user's point of view, the shell is the user and the Linux operating system communication Bridge. The user can either enter command execution or use shell scripting to do more complicated operations. In the increasingly perfect Linux GUI today, in the field of system

Http://www.cnblogs.com/suyang/archive/2008/05/18/1201990.htmlFrom the programmer's point of view, the shell itself is a program written in C language, from the user's point of view, the shell is the user and the Linux operating system communication Bridge. The user can either enter command execution or use shell scripting to do more complicated operations. In the

Easy-to-use SHELL small programming and SHELL programming 1 determines whether the input is a number, character, or other Script code: Detection Result: 2. Average: Test results: 3. Auto-subtraction output: Script code: 　　　　　　 Test results: 4. Add a prefix to the file: Script code: Effect display: 5. check wheth

From the programmer's perspective, shell itself is a program written in C language. From the user's perspective, shell is a bridge between the user and the Linux operating system. You can enter commands for execution and use shell script programming to perform more complex operations. With the increasingly sophisticate

Shell programming notes, shell programming1. Bash variableUser-Defined variables # local variablesEnvironment Variable # global variableLocation Parameter VariablePredefined VariablesX = val # value assignment$ X # CallThe default value of the variable is quiet and cannot be calculated directly."$ X" $ {x} variable superposition, that is, stringSet # view all Sys

TCSH shell is different from other shells, because the control structure is more in line with the programming language format. for example, the control structure of the test condition of TCSH is an expression rather than a linux Command. The obtained value is a logical value of true or false. The expression of TCSH is basically the same as that of the C language.A tcsh