unix shell scripting examples

Previous Edit CommandA: Append data after the current cursorO: The next line of the cursor inserts dataDW Delete a Wordd$ Delete to end of lineDD: Delete Row, 5dd delete 5 rowsThe use of backspace and delete keys in normal mode is not recognized.10.1.4 Copy and pasteDD can be pasted with p after deletion.The copy command is Y,YW copy a wordy$ Copy to end of lineThen use p to paste10.1.5 Find Replacement: s/old/new/g a line command to replace all old, which is replaced only on one line: N,ms/old

Examples of common Linux commands and Bash Shell scripts, bashshellSummary The Linux Command isText-based input/outputAccording to the simple functions, loose input, and rigorous output of the program mentioned in the Unix philosophy, various program combinations can have more powerful functions, the main reason for this flexibility is that Linux requires that th

First, Introduction 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

A brief introduction to shell script writing ideas and examples Often heard around a lot of learning shell script Friends complain shell script is not easy to write, not difficult to write out the script has been an error, symbol space is too much, the wrong one can not run also difficult to troubleshoot. Objectively s

Origin: In the old boy Linux training shell programming teaching, found a lot of good level of friends and classmates are still very confused, the following for everyone to share the use of the array of small examples, I hope to give you a little help. In fact, the shell array is very simple and useful. We should follow the principles of simplicity and ease of us

The test command expects to find a parameter on the command line that is considered empty when the shell does not assign a value to the variable. This means that when the script is being processed, test will report the error once the script is looking for a parameter that does not exist. When you try to protect the script, you can solve the problem by including all the arguments in double quotes. The shell

Shell1) is a scripting language used on the Linux operating system, providing interfaces for user interaction with the system, similar to the command prompt in Windows, but more powerful;2) can be executed by the command line, or it can be edited as a script file;3) mainly for automation simple system or software operation task;4) Easy to configure, maintain and transplant, do not fancy execution efficiency;5) The generic

Example 2: Define and output array elements by script: [Root@oldboy scripts]# Cat printarray.sh Dir= ($ (ls.)) for ((i=0; i Todo Echo-e "${dir[$i]}\n" Done [Root@oldboy scripts]# SH printarray.sh Oldboy.log apachemon.sh Httpdctl printarray.sh ==================================================== 2) Method Two: Enumerating Element method array= (red green blue Yellow magenta) Array= ( Oldboy Zhangyue Zhangyang ) Example 3: Scripting