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1. • • Sure. bash someScript.sh | sed -n '2 p' will filter your output and just print the second line of it. To make that a parameter to vim: vim "$(bash someScript.sh | sed -n '2 p')"
     unix.stackexchange.com › questions › 29878

     bash - Can I access Nth line number of standard output ...

2. Top results related to should you read the second in command line

   • read the second line from the text

     Top Answer

     Answered Mar 03, 2023 · 6 votes

     var desiredText = File.ReadLines("C:\myfile.txt").ElementAt(1);-

     File.ReadLines() returns an IEnumerable<String> of the lines in a file. The index of the second line is 1. See this.

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     1/5

   • In picocli how do you make options on the command line to override the same option in an @-file

     Top Answer

     Answered Mar 16, 2022 · 0 votes

     Let me paraphrase the question to see if I understand it correctly:

     If the end user specifies an option directly on the command line, the command line value should be used, while if that option is not specified on the command line, the value in a file should be used.

     Essentially, you are using an @-file with the intention to define default values for one or more options. However, that is not what @-files were designed for: picocli cannot distinguish between arguments that came from the command line and arguments that came from the @-file.

     I would suggest using picocli's default provider mechanism instead.

     One idea is to use the built-in PropertiesDefaultProvider

     :

     import picocli.CommandLine.PropertiesDefaultProvider;-@Command(name = "myapp", defaultValueProvider = PropertiesDefaultProvider.class)class MyApp { }-

     PropertiesDefaultProvider also uses a file, and the values in that file are only used for options that were not specified on the command line.

     The tricky bit is the location of this file. PropertiesDefaultProvider looks for the file in the following locations:

     • the path specified by system property picocli.defaults.${COMMAND-NAME}.path
     • a file named .${COMMAND-NAME}.properties in the end user's user home directory

     (Replace ${COMMAND-NAME} by the name of the command, so for a command named myapp, the system property is picocli.defaults.myapp.path)

     To give end users the ability to specify the location of the file, we need to set the system property before picocli completes parsing the command line arguments.

     We can do that with an @Option-annotated setter method. For example:

     class MyApp { @Option(names = "-D") void setSystemProperty(Map<String, String> properties) { System.getProperties().putAll(properties); }}-

     This would allow end users to invoke the command with something like this:

     myapp --sourceDatabaseType=MySQL -Dpicocli.defaults.myapp.path=.\myapp.options-

     If this is too verbose, you could go one step further and create a special -@ option, to allow users to invoke the command with something like this:

     myapp --sourceDatabaseType=MySQL -@.\myapp.options-

     The implementation for this would be an annotated setter method, similar to the above:

     class MyApp { @Spec CommandSpec spec; // injected by picocli- @Option(names = "-@") void setDefaultProviderPath(File path) { // you could do some validation here: if (!path.canRead()) { String msg = String.format("ERROR: file not found: %s", path); throw new ParameterException(spec.commandLine(), msg); } // only set the system property if the file exists System.setProperty("picocli.defaults.myapp.path", path.toString()); }}-

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     2/5

   • In pdb how do you reset the list (l) command line count?

     Top Answer

     Answered Aug 24, 2009 · 4 votes

     You could monkey patch it for the behavior you want. For example, here is a full script which adds a "reset_list" or "rl" command to pdb:

     import pdb-def Pdb_reset_list(self, arg): self.lineno = None print >>self.stdout, "Reset list position."pdb.Pdb.do_reset = Pdb_reset_listpdb.Pdb.do_rl = Pdb_reset_lista = 1b = 2pdb.set_trace()print a, b

     One could conceivably monkey patch the standard list command to not retain the lineno history.

     edit: And here is such a patch:

     import pdbPdb = pdb.Pdb-Pdb._do_list = Pdb.do_listdef pdb_list_wrapper(self, arg): if arg.strip().lower() in ('r', 'reset', 'c', 'current'): self.lineno = None arg = '' self._do_list(arg)Pdb.do_list = Pdb.do_l = pdb_list_wrappera = 1b = 2pdb.set_trace()print a, b

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     3/5

   • In Git how can you check which repo in Github you are pushing to from the command line?

     Top Answer

     Answered Nov 22, 2015 · 90 votes

     I think you need to reconfig git remote

     type git remote -v and see if there's a mismatch or not. If there is, follow this instruction from github: https://help.github.com/articles/changing-a-remote-s-url/

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     4/5

   • Read text file in scala command Line

     Top Answer

     Answered Oct 11, 2017 · 2 votes

     Since filo.txt is a relative file path you need to make sure that the running program uses the location of filo.txt as the working directory.

     Example:

     echo 'my test data' > ~/mydir/filo.txtcd ~/mydirscala Main.scala

     So when you run this program it needs to be started in mydir. You could avoid this by using a fully qualified path.

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     5/5

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3. People also ask

   What is a read command in Linux?

   • read is a bash built-in command that reads a line from the standard input (or from the file descriptor) and split the line into words. The first word is assigned to the first name, the second one to the second name, and so on. The general syntax of the read built-in takes the following form: read [options] [name...]

   Bash read Command | Linuxize

   linuxize.com/post/bash-read/

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   How do I read a file if it's a long file?

   • If the file is long and you're only interested in one line, use sed to print the desired line and quit, or tail to remove the previous lines and head to extract the first line of the result. (Note that tail -n +$n skips n-1 lines, i.e. its output starts with the nth line.) For a small number of lines, you can use the read built-in.

   bash - Can I access Nth line number of standard output? - Unix & Linux

   unix.stackexchange.com/questions/29878/can-i-access-nth-line-number-of-standard-output

   See all results for this question

   What is a built-in read command in Bash?

   • Bash ships with a number of built-in commands that you can use on the command line or in your shell scripts. In this article, we’ll explore the built-in read command. read is a bash built-in command that reads a line from the standard input (or from the file descriptor) and split the line into words.

   Bash read Command | Linuxize

   linuxize.com/post/bash-read/

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   How do I read a shortest file with empty lines?

   • echo "read '$line1' from file 1 and '$line2' from file 2" Using read <&8 || read <&9 completes the shortest file with empty lines to match the longest file. To exit as soon as the end of either file is reached, use && instead of ||. If you want to detect all cases, check the return code separately.

   shell - Read multiple lines from text files in bash - Unix & Linux

   unix.stackexchange.com/questions/209653/read-multiple-lines-from-text-files-in-bash

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   How do I use read in Linux?

   • Generally, you should always use read with the -r option. The default behavior of read is to split the line into words using one or more spaces, tabs, and newline as delimiters. To use another character as a delimiter, assign it to the IFS variable (Internal Field Separator). echo "Linux:is:awesome."

   Bash read Command | Linuxize

   linuxize.com/post/bash-read/

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   How to read all lines in JavaScript?

   • (Note that tail -n +$n skips n-1 lines, i.e. its output starts with the nth line.) For a small number of lines, you can use the read built-in. If you want to read all lines, you can put them in an array (ksh/bash/zsh only). If you want to make this reusable code, put it in a function.

   bash - Can I access Nth line number of standard output? - Unix & Linux

   unix.stackexchange.com/questions/29878/can-i-access-nth-line-number-of-standard-output

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4. stackoverflow.com › questions › 53613910How can we read the second line of a file using batch script?

   stackoverflow.com › questions › 53613910

   • Cached

   Dec 4, 2018 · I would like to retrieve the second line of a file (install.cfg) which contains a few lines of text. I tried with below code which is working fine in my local machine, but when executed on a windows machine, it throws 'þ@' is not recognized as an internal or external command, operable program or batch file.

   Code sample

   for /F "usebackq skip=1 delims=" %%G in ("install.cfg") do set "VERSION=%%G" & goto HaveValue

   :HaveValue

   echo Version read from file: %VERSION%

   See more on stackoverflow

5. stackoverflow.com › questions › 1429556bash - Command to get nth line of STDOUT - Stack Overflow

   stackoverflow.com › questions › 1429556

   • Cached

   Jun 18, 2019 · ls -l | (for ((x=0;x<2;x++)) ; do read ; done ; head -n1) Throw away lines until you get to the second, then print out the first line after that. So, it prints the 3rd line. If it's just the second line.. ls -l | (read; head -n1) Put as many 'read's as necessary.

   • Using sed , just for variety: ls -l | sed -n 2p Using this alternative, which looks more efficient since it stops reading the input when the requi...
   • ls -l | head -2 | tail -1
   • Alternative to the nice head / tail way: ls -al | awk 'NR==2' or ls -al | sed -n '2p'
   • From sed1line : # print line number 52 sed -n '52p' # method 1 sed '52!d' # method 2 sed '52q;d' # method 3, efficient on...
   • For the sake of completeness ;-) shorter code find / | awk NR==3 shorter life find / | awk 'NR==3 {print $0; exit}'
   • Try this sed version: ls -l | sed '2 ! d' It says "delete all the lines that aren't the second one".
   • Another poster suggested ls -l | head -2 | tail -1 but if you pipe head into tail, it looks like everything up to line N is processed twice. Pipin...
   • You can use awk: ls -l | awk 'NR==2' Update The above code will not get what we want because of off-by-one error: the ls -l command's first line i...
   • Is Perl easily available to you? $ perl -n -e 'if ($. == 7) { print; exit(0); }' Obviously substitute whatever number you want for 7.

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7. unix.stackexchange.com › questions › 29878bash - Can I access Nth line number of standard output ...

   unix.stackexchange.com › questions › 29878

   • Cached

   nth_line=$(tail -n +$n | head -n 1) (Note that tail -n +$n skips n-1 lines, i.e. its output starts with the nth line.) For a small number of lines, you can use the read built-in. IFS= read -r first_line; IFS= read -r second_line. If you want to read all lines, you can put them in an array (ksh/bash/zsh only).

   • Sure. bash someScript.sh | sed -n '2 p' will filter your output and just print the second line of it. To make that a parameter to vim : vim "$(bas...
   • Use head and tail, e.g. accessing the 2nd line of an output: bash someScript.sh | head -2 | tail -1
   • If being short to type is paramount and the file isn't very large: nth_line=$(sed -n ${n}p) nth_line=$(sed \!${n}d) If the file is long and you're...
   • Below are the two better ways to print nth line of text files in linux. Use the combination of head and tail command One of the easiest way of prin...
   • I solved it even though it's a bit hackish ;) That's the script outputting file paths: #!/bin/bash rm /tmp/svn_filelist_to_source /tmp/svn_filelist...

8. linuxize.com › post › bash-readBash read Command | Linuxize

   linuxize.com › post › bash-read

   • Cached

   • Bash Read Built-In #
   • Changing The Delimiter #
   • Prompt String #
   • Assign The Words to Array #
   • Conclusion #

   readis a bash built-in command that reads a line from the standard input (or from the file descriptor) and split the line into words. The first word is assigned to the first name, the second one to the second name, and so on. The general syntax of the readbuilt-in takes the following form: To illustrate how the command works, open your terminal, ty...

   See full list on linuxize.com

   The default behavior of read is to split the line into words using one or more spaces, tabs, and newline as delimiters. To use another character as a delimiter, assign it to the IFSvariable (Internal Field Separator). When IFSis set to a character other than space or tab, the words are separated by exactly one character: The line is separated in fo...

   See full list on linuxize.com

   When writing interactive bash scripts, you can use the readcommand to get the user input. To specify a prompt string, use the -p option. The prompt is printed before the readis executed and doesn’t include a newline. Here is a simple example: Generally, you would use the read command inside a whileloop to force the user to give one of the expected ...

   See full list on linuxize.com

   To assign the words to an arrayinstead of variable names, invoke the read command with the -aoption: When both an array and a variable name are given, all words are assigned to the array.

   See full list on linuxize.com

   The readcommand is used to split a line of input into words. If you have any questions or feedback, feel free to leave a comment.

   See full list on linuxize.com

9. superuser.com › questions › 1238805batch file - Get second line of output from command - Super User

   superuser.com › questions › 1238805

   • Cached

   Aug 8, 2017 · For before this Windows 10 update, you can use : type "C:\Temp\my_file.txt" | findstr /n . | findstr /b ^3: (this will output line 3 of the file, but the line number will have to be strip out)

10. www.lifewire.com › how-to-read-command-syntax-2618082How to Read Command Syntax in Windows - Lifewire

    www.lifewire.com › how-to-read-command-syntax-2618082

    • Cached

    Jan 9, 2023 · Here are several examples to help you read the syntax of Command Prompt, MS-DOS, and other kinds of commands in Windows and other CLI programs.

11. askubuntu.com › questions › 334994Which one is better: using ; or && to execute multiple ...

    askubuntu.com › questions › 334994

    • Cached

    Aug 20, 2013 · Using && will execute the second command only when first command executed successfully (status 0). Both are used on different perspective. Like for a longer process, say for an installation you need to compile and install it. you should make && make install .