In Linux, there are some special characters that need to be escaped to be used correctly. Here are some common characters that need to be escaped:

1, backslash \: used to escape other characters.

2. Single quotation mark' or double quotation mark': used to refer to a string. If the string itself contains quotation marks, you need to use escape characters to ensure that quotation marks are handled correctly.

3. Spaces: used to split command line parameters. If you need to use a file name or directory name that contains spaces, you can use backslashes to escape it or put it in quotation marks.

4. Dollar symbol $: In some cases, it is necessary to escape the dollar symbol to avoid being interpreted as variable substitution by the shell.

5. Percent%: In some contexts, it is necessary to escape the percent sign.

6. ampersand & In some cases, it is necessary to escape the ampersand to prevent it from being interpreted as a background task operator.

7. Redirect symbols

It is necessary to determine whether to escape a specific character according to the specific context and usage scenario. Generally speaking, when using these special characters in shell commands, it is best to use appropriate escape characters or quotation marks to ensure that they are correctly interpreted and handled.