What is BC command?

What is BC command?

The bc command is an interactive process that provides arbitrary-precision arithmetic. The bc command first reads any input files specified by the File parameter and then reads the standard input. The bc command allows you to specify an input and output base for operations in decimal, octal, or hexadecimal.

How do you use BC on a calculator?

To open bc in interactive mode, type the command bc on command prompt and simply start calculating your expressions. You should note that while bc can work with arbitrary precision, it actually defaults to zero digits after the decimal point, for example the expression 3/5 results to 0 as shown in the following output.

What Does BC do in bash?

The full form of bc is Bash Calculator. It is used for performing floating-point mathematical operations. Before you perform any arithmetic operation using bc command, make sure you set the value of a built-in variable called scale . This variable is used to set the number of decimal places.

What does BC command do in Linux?

bc command is used for command line calculator. It is similar to basic calculator by using which we can do basic mathematical calculations. Arithmetic operations are the most basic in any kind of programming language.

What is the output of who command?

Explanation: who command output the details of the users who are currently logged in to the system. The output includes username, terminal name (on which they are logged in), date and time of their login etc. 11.

Which command is used to identify files?

The ‘file’ command is used to identify the types of file. This command tests each argument and classifies it. The syntax is ‘file [option] File_name’.

What is used of who command in Linux?

The standard Unix command who displays a list of users who are currently logged into the computer. The who command is related to the command w , which provides the same information but also displays additional data and statistics.

Which command will find all the files without permission 777?

The -perm command line parameter is used with find command to search files based on permissions. You can use any permission instead of 777 to find files with that permissions only. The above command will search all files and directories with permission 777 under the specified directory.

Which command will find a file without showing permission denied messages?

Find a file without showing “Permission Denied” messages When find tries to search a directory or file that you do not have permission to read the message “Permission Denied” will be output to the screen. The 2>/dev/null option sends these messages to /dev/null so that the found files are easily viewed.

Which command will print the length of the longest line using wc command?

-L: The ‘wc’ command allow an argument -L, it can be used to print out the length of longest (number of characters) line in a file.

Which command will find all read only files?

you could do ls -l | grep ^. r\-\- to find exactly what you asked for, “files that have read permission only…”

How do I make a folder not read only?

Read-only Files

1. Open Windows Explorer and navigate to the file you want to edit.
2. Right-click the file name and select “Properties.”
3. Select the “General” tab and clear the “Read-only” check box to remove the read-only attribute or select the check the box to set it.
4. Click the Windows “Start” button and type “cmd” in the Search field.

How do I make a file not read only?

Remove read only

1. Click the Microsoft Office Button. , and then click Save or Save As if you have previously saved the document.
2. Click Tools.
3. Click General Options.
4. Clear the Read-only recommended check box.
5. Click OK.
6. Save the document. You might need to save it as another file name if you have already named the document.

Which command will to find all the files which are changed in last 1 hour?

You can use -mtime option. It returns list of file if the file was last accessed N*24 hours ago. For example to find file in last 2 months (60 days) you need to use -mtime +60 option. -mtime +60 means you are looking for a file modified 60 days ago.

How do I find the last 5 days in Unix?

find is the Unix command line tool for finding files (and more) /directory/path/ is the directory path where to look for files that have been modified. Replace it with the path of the directory where you want to look for files that have been modified in the last N days.

Which file most recently modified?

File Explorer has a convenient way to search recently modified files built right into the “Search” tab on the Ribbon. Switch to the “Search” tab, click the “Date Modified” button, and then select a range. If you don’t see the “Search” tab, click once in the search box and it should appear.

How do you check who modified a file last in Linux?

You might be able to narrow the list down.

1. use stat command (ex: stat , See this)
2. Find the Modify time.
3. Use last command to see the log in history (see this)
4. Compare the log-in/log-out times with the file’s Modify timestamp.

How can I see deleted history in Linux?

4 Answers. First, run debugfs /dev/hda13 in your terminal (replacing /dev/hda13 with your own disk/partition). (NOTE: You can find the name of your disk by running df / in the terminal). Once in debug mode, you can use the command lsdel to list inodes corresponding with deleted files.

Which of the following commands would you use to see when a file was last modified?

date command with -r option followed by the name of file will display the last modified date and time of the file. which is the last modified date and time of the given file. date command can also be used to determine the last modified date of a directory.

How do you check if a file has been modified in Linux?

The modification time can be set by the touch command. If you want to detect whether the file has changed in any way (including the use of touch , extracting an archive, etc.), check whether its inode change time (ctime) has changed from the last check. That’s what stat -c %Z reports.

How do you check if a file has been modified in Java?

In Java, we can use Files. readAttributes() to get the file metadata or attribute, and then lastModifiedTime() to display the last modified date of a file.

What is Newermt in Linux?

newermt ‘ will give you all files which are newer than specified date and ! will exclude all files which are newer than the specified date. So the above command will give a list of files which were modified on

How do I find a file modified on a certain date in Unix?

2. The find Command

1. 2.1. -mtime and -mmin. -mtime is handy, for example, if we want to find all the files from the current directory that have changed in the last 24 hours: find . – mtime -1.
2. 2.2. -newermt. There are times when we want to find the files that were modified based on a particular date.

Where is the last 30 days file in Linux?

You can also search the files modified before X days. Use -mtime option with the find command to search files based on modification time followed by the number of days. Number of days can be used in two formats.

How do I find the latest files in a directory?

find . -type f -exec stat -c ‘%X %n’ * : prints the last access’ time followed by the file’s path for each file in the current directory hierarchy; find .

How do I grep files by date?

1. Just realized date +%D -r file or date +%F -r file would do nicely too. – jayreed1 Sep 10 ’19 at 21:30.
2. Something like find . – exec grep -q set {} \; -exec echo -n “{} ” \; -exec date +%F -r {} \; – jayreed1 Sep 10 ’19 at 21:31.

How do I grep a timestamp?

I suggest you do:

1. Press CTRL + ALT + T .
2. Run the command ( -E for extended regex): sudo grep -E ’09:3[6-9]’ <file or file_path>

How do I find files modified after a certain date?

In the File Explorer ribbon, switch to the Search tab and click the Date Modified button. You’ll see a list of predefined options like Today, Last Week, Last Month, and so on. Pick any of them. The text search box changes to reflect your choice and Windows performs the search.

How do I grep a file in Linux?

The grep command consists of three parts in its most basic form. The first part starts with grep , followed by the pattern that you are searching for. After the string comes the file name that the grep searches through. The command can contain many options, pattern variations, and file names.