How do I remove a junk character in Unix?
Different ways to remove special characters from UNIX files.
- Using vi editor:-
- Using command prompt/Shell script:-
- a) Using col command: …
- b) Using sed command: …
- c) Using dos2unix comand: …
- d) To remove the ^M characters in all files of a directory:
How do you delete data in a Unix file?
5 Ways to Empty or Delete a Large File Content in Linux
- Empty File Content by Redirecting to Null. …
- Empty File Using ‘true’ Command Redirection. …
- Empty File Using cat/cp/dd utilities with /dev/null. …
- Empty File Using echo Command. …
- Empty File Using truncate Command.
How do I remove the first character from a Unix file?
You can also use the 0,addr2 address-range to limit replacements to the first substitution, e.g. That will remove the 1st character of the file and the sed expression will be at the end of its range — effectively replacing only the 1st occurrence. To edit the file in place, use the -i option, e.g.
What are the junk characters?
i.e., any character having an ascii equivalent decimal value of more than 127 is a junk character(courtesy www.asciitable.com). My database is SQL SERVER 2008.
How do I convert a special character to a csv file?
Open the excel-csv. csv file using your preferred text editor, for example Notepad. Click File > Save As, enter a file name and change the encoding to UTF-8. Then click the Save button.
How do I remove a UTF-8 character from a CSV file?
2 Answers
- use a charset that will accept any byte such as iso-8859-15 also known as latin9.
- if output should be utf-8 but contains errors, use errors=ignore -> silently removes non utf-8 characters, or errors=replace -> replaces non utf-8 characters with a replacement marker (usually ? )
How do you delete multiple lines in Unix?
Deleting Multiple Lines
- Press the Esc key to go to normal mode.
- Place the cursor on the first line you want to delete.
- Type 5dd and hit Enter to delete the next five lines.
How do you force delete a file in Linux?
To remove file or directory forcefully, you can use the option -f force a deletion operation without rm prompting you for confirmation. For example if a file is unwritable, rm will prompt you whether to remove that file or not, to avoid this and simply execute the operation.
How do you clear a log file?
How to clean log files in Linux
- Check the disk space from the command line. Use the du command to see which files and directories consume the most space inside of the /var/log directory. …
- Select the files or directories that you want to clear: …
- Empty the files.
How do I remove the first character of a line in Unix?
2 Answers
- find . – type f -name “*.java” – to find all *.java files recursively.
- sed -i ‘s/.{10}//’ – remove the 1st 10 characters from each line in each found file ( -i option allows to modify the file in-place)
- this solution will work with GNU sed . With BSD sed you need -i ” , as -i requires an argument there.
How do I remove the first character of a string in Shell?
To remove the first character of a string in any POSIX compatible shell you need only look to parameter expansion like: ${string#?}