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20. all those are best ways and there is one more way to do this & that’s with head command. head -n -1 filename.txt. and. head -n -0 filename.txt. both will give you the same input. Head command Explanation: Generally head command used to print the starting lines of the any text file.we can view the text file with.
What does the command ./ mean? For example, sometimes we call a file with ./config, sometimes ../config, thanks
8. sharon@sharon:~$ cd Home bash: cd: Home: No such file or directory. The little cedilla ~ indicates you are already in your /home/sharon directory. When you ask for 'cd Home' the terminal looks for /home/sharon/Home. There is none. sharon@sharon:~$ cd /Home bash: cd: /Home: No such file or directory.
1509. sed -i 's/original/new/g' file.txt. Explanation: sed = Stream EDitor. -i = in-place (i.e. save back to the original file) The command string: s = the substitute command. original = a regular expression describing the word to replace (or just the word itself) new = the text to replace it with.
Full command: To hibernate, i.e. suspend to harddisk instead of RAM, replace 'Suspend' at the end of the command by 'Hibernate'. To just lock the screen without suspending, xscreensaver-command -lock will work, IF you type only 1 hyphen for the '-lock' option, and only if the screensaver is running.
Save all the terminal output to a file. This answer uses a little known command called script which saves all your shell's output to a text file until you type exit. The command output still appears on your screen but also appears in the text file. The process is simple. Use: $ script ~/outputfile.txt.
By default it asks for confirmation and then logs you out (i.e., the --logout argument is assumed unless overridden with --power-off explicitly). You can also tell the command to not prompt for confirmation on logout: --no-prompt. End the session without user interaction. This only works with --logout.
mv can do two jobs. It can move files or directories. It can rename files or directories. To just rename a file or directory type this in Terminal: mv old_name new_name. with space between the old and new names. To move a file or directory type this in Terminal. mv file_name ~/Desktop. it will move the file to the desktop.
The command ls with the argument --color=auto (on Ubuntu, ls is an alias for ls --color=auto) goes through all the file names and tries first to match different types, like Executable, Pipe and so on. It then tries to match regular expressions like *.wav and prints the resulting filename, enclosed in these colour-changing instructions for bash.
23. To delete all files and directories (including the hidden ones) in a directory, you can try the following: delete the folder, then recreate it. rm -rf dir_name && mkdir dir_name. use find. find dir_name -mindepth 1 -delete. Here we specify -mindepth 1 to exclude the directory dir_name itself.