Always private
DuckDuckGo never tracks your searches.
Learn More
You can hide this reminder in Search Settings
All regions
Argentina
Australia
Austria
Belgium (fr)
Belgium (nl)
Brazil
Bulgaria
Canada (en)
Canada (fr)
Catalonia
Chile
China
Colombia
Croatia
Czech Republic
Denmark
Estonia
Finland
France
Germany
Greece
Hong Kong
Hungary
Iceland
India (en)
Indonesia (en)
Ireland
Israel (en)
Italy
Japan
Korea
Latvia
Lithuania
Malaysia (en)
Mexico
Netherlands
New Zealand
Norway
Pakistan (en)
Peru
Philippines (en)
Poland
Portugal
Romania
Russia
Saudi Arabia
Singapore
Slovakia
Slovenia
South Africa
Spain (ca)
Spain (es)
Sweden
Switzerland (de)
Switzerland (fr)
Taiwan
Thailand (en)
Turkey
Ukraine
United Kingdom
US (English)
US (Spanish)
Vietnam (en)
Safe search: moderate
Strict
Moderate
Off
Any time
Any time
Past day
Past week
Past month
Past year
  1. baeldung.com

    Mar 18, 2024We may miss a particular command when multiple commands are run one-by-one; We may misspell a particular command, which may lead to unintended consequences; It's time-consuming and annoying to run multiple commands one-by-one; To prevent such situations and obtain the expected result, we can combine and execute multiple commands in the ...
  2. stackoverflow.com

    Another option is typing Ctrl+V Ctrl+J at the end of each command. Example (replace # with Ctrl+V Ctrl+J): $ echo 1# echo 2# echo 3 Output: 1 2 3 This will execute the commands regardless if previous ones failed. Same as: echo 1; echo 2; echo 3. If you want to stop execution on failed commands, add && at the end of each line except the last one.
  3. howtogeek.com

    Combining two or more commands on the command line is also known as "command chaining". We'll show you different ways you can combine commands on the command line. Related: 10 Basic Linux Commands for Beginners. Option One: The Semicolon (;) Operator The semicolon (;) operator allows you to execute multiple commands in succession, regardless of ...
    Author:Lori Kaufman
  4. unix.stackexchange.com

    Doesn't matter that they programs don't finish. 'tail -f' doesn't "finish" either, but this still works and combines the outputs of both programs. Works for more than two commands as well. ^c to quit kills only one of the grouped commands. You'll have to kill the other's manually, though. -
  5. askubuntu.com

    Your magical union thing is a semicolon... and curly braces: { cat wordlist.txt ; ls ~/folder/* ; } | wc -l The curly braces are only grouping the commands together, so that the pipe sign | affects the combined output.. You can also use parentheses around a command group, which would execute the commands in a subshell. This has a subtle set of differences with curly braces, e.g. try the ...
  6. Let me show you in detail how you can chain commands in Linux. Using ; to run multiple Linux commands in one line. The simplest of them all is the semicolon (;). You just combine several commands that you want to run using ; in the following fashion: cmd1; cmd2; cmd3. Here, cmd1 will run first.
  7. howtouselinux.com

    May 5, 2024In this tutorial, we'll see the different ways in which we can combine and execute multiple Linux commands efficiently. We'll be using Bash for our examples, so there could be slight differences with other shells. ... Concatenate Commands in Linux. The ";" operator executes all commands regardless of whether the previous ones failed or not.
  8. askubuntu.com

    This ensures that subsequent commands are only executed if previous commands have not failed. This avoids some awkward consequences. For example: cd /somewhere_else; rm -Rf * could do something disastrous if /somewhere_else doesn't exist or you mis-spell it; cd /somewhere_else && rm -Rf * protects you from this.
  9. superuser.com

    For example I have two commands here: { command1 & command2; } >> file1 For example the output of command1 is 400, and the output of command2 is 4. So this is what I get: 400 4 I want the outputs of the two commands to be appended on the same line like this: 400 4
  10. stackoverflow.com

    Depending on the commands that need to be chained/concatenated, the following could also be used. command A ; command B will run the first command regardless of the success/failure of the second command. command A & command B This command sends a process/script/command to the background. command A && command B will run command B only if command ...
  11. Can’t find what you’re looking for?

    Help us improve DuckDuckGo searches with your feedback

  1. You are using | (pipe) to direct the output of a command into another command. What you are looking for is && operator to execute the next command only if the previous one succeeded:

    cp /templates/apple /templates/used && cp /templates/apple /templates/inuse && rm /templates/apple

    Or

    cp /templates/apple /templates/used && mv /templates/apple /templates/inuse

    To summarize (non-exhaustively) bash's command operators/separators:

    • | pipes (pipelines) the standard output (stdout) of one command into the standard input of another one. Note that stderr still goes into its default destination, whatever that happen to be.
    • |&pipes both stdout and stderr of one command into the standard input of another one. Very useful, available in bash version 4 and above.
    • && executes the right-hand command of && only if the previous one succeeded.
    • || executes the right-hand command of || only it the previous one failed.
    • ; executes the right-hand command of ; always regardless whether the previous command succeeded or failed. Unless set -e was previously invoked, which causes bash to fail on an error.

    --Maxim Egorushkin

    Was this helpful?
Custom date rangeX