Introduction
In this section, we will learn how to view files. In fact, we have used these commands multiple times in previous tutorials, so many of you may already be very familiar with them. In Windows, we know that both txt text files and word docx files have corresponding software to open and view them. However, in the Linux terminal, which lacks an interactive interface, we need to use commands for text viewing.
# Generate test file: for i in {1..100}; do echo $i >> test.txt done
# wc syntax: wc-options filename
# -l: display only the number of lines: wc -l test.txt
# -w: display only the number of words: wc -w test.txt
# wc -w test.txt wc -c test.txt
# cat syntax: cat-options filename
# -A: display special characters: cat -A test.txt
# -s: merge empty lines: cat -s test.copy.txt
# -b: display line numbers: cat -b test.txt
# cat redirection method 1: cat > filename Ctrl + D
# cat redirection method 2: cat << terminator > filename
# head syntax: head-options filename
# -n: number of lines to display: cat -n test.txt
# --line: same as above: cat --line 5 test.txt
# -number: same as above: cat -5 test.txt
# tail syntax: tail-options filename
# View lines 51 to 60 of the file: tail -50 test.txt | head -10Video Tutorial
Simultaneously broadcast on Bilibili for easier viewing. You can directly access the original text at the end of this article:https://www.bilibili.com/video/BV1hT411F7r7?p=23
Learning Materials for This Section
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Previous Reviews
Learn Linux with Biomamba | 1. Computer Hardware CompositionLinux | 2. Computer Software Composition and LinuxLinux | 3. Free Linux System – WSLLinux | 4. Free Linux System – Virtual MachineLinux | 5. Free Linux System – ServerLinux | 6. Command Line and Basic CommandsLinux | 7. Several Ways to Get Help with Linux CommandsLinux | 8. Linux File Directory SystemLinux | 9. Path Viewing and Switching: pwd, cd, ls CommandsLinux | 10. WildcardsLinux | 11. File Deletion: rm CommandLinux | 12. File Copy (cp) and Move (mv)Linux | 13. Concepts of Users and GroupsLinux | 14. User Management Commands (useradd, passwd, userdel, su)Linux | 15. File Permission Management: chown, chmodLinux | 16. ShortcutsLinux | 17. Output RedirectionLinux | 18. Pipe SymbolLinux | 19. File Search: find, locate, whichLinux | 20. Aliases: aliasLinux | 21. Soft Links and Hard Links: lnLinux | 22. (De)compression and MD5 Checksum
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