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Common Linux commands---tar | zip (decompression)

Reducing file size has two obvious benefits. One is that it can reduce storage space, and the other is that it can reduce the transmission time when transferring files over the network. gzip is a command commonly used in Linux systems to compress and decompress files. It is convenient and easy to use. Gzip can not only be used to compress large, rarely used files to save disk space, but can also be used together with the tar command to form a popular compressed file format in the Linux operating system. According to statistics, the gzip command has a compression rate of 60% to 70% for text files.

Dec 19, 2016 pm 02:23 PM

How to decompress a single file from a tarball on linux system

This article introduces: How to decompress a single file from a tarball on a Linux system

Dec 19, 2016 pm 02:19 PM

Summary of decompression and compression commands such as tar.gz, tar, bz2, zip, etc. under Linux

For compression and decompression methods of many compressed files such as tar gz bz2 tgz z under Linux, friends in need can refer to the following

Dec 19, 2016 pm 02:17 PM

Detailed explanation of tar decompression command

This article introduces: Detailed explanation of tar decompression command

Dec 19, 2016 pm 02:14 PM

Detailed explanation of tar compression and decompression commands under Linux

This article introduces: Detailed explanation of tar compression and decompression commands under Linux

Dec 19, 2016 pm 02:13 PM

PHP four basic algorithms: bubble, selection, insertion and quick sort

Many people say that algorithms are the core of programs. The key to whether a program is better than worse is the quality of the program's algorithm. As a junior PHPer, although I have little exposure to algorithmic things. But for the four basic algorithms of bubble sort, insertion sort, selection sort, and quick sort, I think we still need to master them.

Dec 19, 2016 pm 02:07 PM

Exchange sort—Bubble Sort (Bubble Sort)

Exchange sorting mainly compares the key codes of the records to be sorted in pairs. If the key codes of the records to be sorted occur, if they are contrary to the sorting requirements, they will be exchanged. Let’s first look at the bubbling process of sorting columns: Let 1<j≤n, r[1], r[2],···,r[j] be the columns to be sorted. Through pairwise comparison and exchange, Rearrange the storage order so that r[j] is the record with the largest key in the sequence.

Dec 19, 2016 pm 02:04 PM

Bubble Sort

Optimized version of bubble sort, performance nearly doubled

The original bubble sort is relatively time-consuming, even if an array has become ordered after several rounds of exchanges, such as the array [2,1,3,4,5,6,7], after the first The round has become orderly, but the stubborn bubbling still has to continue to make unnutritious pairwise comparisons, thus sacrificing time.

Dec 19, 2016 pm 01:42 PM

Bubble Sort

Bubble sort and two optimizations of bubble sort

The bubble sort algorithm works as follows: compare two adjacent elements one at a time from front to back. If the second element is smaller than the first element, swap the two elements until the comparison with the last element is completed. , so that the largest element is placed at the end; in this way, the sorting can be completed by repeating the comparison (n-1) times.

Dec 19, 2016 pm 01:39 PM

Bubble Sort

C language bubble sort algorithm and code

Bubble sort is a sorting algorithm with clear ideas and concise code. It is often used in computer courses for college students. The name "bubble" comes from the fact that larger elements will slowly "float" to the top of the sequence through exchange, hence the name. Here we take sorting from small to large as an example.

Dec 19, 2016 pm 01:35 PM

Bubble Sort

Detailed explanation of the difference between Java bubble sort and selection sort

This article is a detailed analysis and introduction to the difference between Java bubble sort and selection sort. Friends who need it can refer to it.

Dec 19, 2016 pm 01:32 PM

Bubble Sort

Comparison of bubble sort, insertion sort, and selection sort algorithms in C language

Mastering commonly used sorting algorithms can save a lot of time in actual project development. There are differences in the execution efficiency of each sorting algorithm. These small time differences may not be felt in ordinary connections, but they are especially important in systems with relatively large amounts of data or tight resources. Important, such as embedded systems. The following is a brief introduction to three commonly used sorting algorithms and a comparison of their execution efficiency. Bubble sorting: Idea: Compare two adjacent numbers and move the smaller number to the front; if there are n numbers, n-1 comparisons must be performed, and n-1 pairwise comparisons must be performed in the first comparison. Comparison, in the jth comparison, n-j pairwise comparisons are performed.

Dec 19, 2016 pm 01:29 PM

bubble sort algorithm

The basic idea of ??exchange sorting is: compare the keywords of the records to be sorted pairwise, and when it is found that the order of the two records is reversed, the exchange is performed until there are no records in the reverse order. The main sorting methods that apply the basic idea of ??exchange sort are: bubble sort and quick sort.

Dec 19, 2016 pm 01:23 PM

Bubble Sort

Sorting bubble sort

The basic concept of Bubble Sort is: compare two adjacent numbers in sequence, put the decimal in the front and the large number in the back. That is, in the first pass: first compare the first and second numbers, put the decimal first and the large number last. Then compare the second number and the third number, put the decimal in front and the large number in the back, and continue like this until comparing the last two numbers, put the decimal in front and the large number in the back. This is the end of the first trip, leaving the largest number at the end. In the second pass: still start the comparison from the first pair of numbers (because it may be due to the exchange of the second number and the third number that the first number is no longer smaller than the second number), put the decimal first, and the large number After releasing, compare all the way to the penultimate number (the penultimate position is already the largest). At the end of the second pass, at the penultimate number

Dec 19, 2016 pm 01:20 PM

Bubble Sort