How do I get the last command in bash?

  1. Ctrl+R: Recall the last command matching the characters you provide. Press this shortcut and start typing to search your bash history for a command.
  2. Ctrl+O: Run the command you found with Ctrl+R.
  3. Ctrl+G: Leave the history searching mode without running a command.

How do I check the status of the last command?

“$?” is a variable that holds the return value of the last executed command. “echo $?” displays 0 if the last command has been successfully executed and displays a non-zero value if some error has occurred. The bash sets “$?” To the exit status of the last executed process.

How do I capture the PID of a process?

How to get PID using Task Manager

  1. Press Ctrl+Shift+Esc on the keyboard.
  2. Go to the Processes tab.
  3. Right-click the header of the table and select PID in the context menu.

What is the command to print the PID of the current shell?

$ expands to the process ID of the shell. So, you can see the PID of the current shell with echo $$ .

How do you check if the last command was successful in Unix?

To know the exit status of last command, run below given command. echo $? You will get the output in integer. If output is ZERO ( 0 ), it means command has been run successfully.

How would you display the process ID PID of the last background job?

The syntax is as follows:

  1. Open the terminal application.
  2. Run your command or app in the background. For example: firefox &
  3. To get the PID of the last executed command type: echo “$!”
  4. Store the pid of the last command in a variable named foo: foo=$!
  5. Print it, run: echo “$foo”

How do I find PID of last command?

How to return pid of a last command in Linux

  1. Open the terminal application.
  2. Run your command or app in the background. For example: firefox &
  3. To get the PID of the last executed command type: echo “$!”
  4. Store the pid of the last command in a variable named foo: foo=$!
  5. Print it, run: echo “$foo”

How do I find the PID of a process in Bash?

There are various ways:

  1. Let the script write its pid itself. Include line echo $$ > /tmp/my. pid in your script.
  2. Use pidof script_name.
  3. Use ps -ef | grep script_name | tr -s ‘ ‘ | cut -d ‘ ‘ -f2.

How do I display the last line of a text file?

To look at the last few lines of a file, use the tail command. tail works the same way as head: type tail and the filename to see the last 10 lines of that file, or type tail -number filename to see the last number lines of the file.

How do I find the last run command in Linux?

1) Ctrl + P This is the most dependable shortcut in Linux to execute the last run command in the terminal. Just press the Ctrl and P keys together to fill the prompt with the last executed command and you are ready to go.