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1
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1answer
36 views

pass all files in directory as one argument to perl script

linux beginner here I have a directory with 50 files in it and I want to simultaneously pass them all to a perl script with just a space between names , as in... ./perl_script.pl file1 file2 file3 ...
4
votes
3answers
83 views

Bash, insert last used argument of current command

I'm aware that you can recall the last argument of the previous command with !$ and also cycle through previous arguments with ALT + . but can you recall the last argument used for the current command ...
0
votes
0answers
30 views

Pass a function arguments?

How would you make a function that gets arguments? function arg_example { arg "c" # This is imaginary but it would return 'true' if it found the argument -c. did_find_arg=$? # Get the ...
1
vote
3answers
32 views

UNC Argument in bash scipt

I want to create a bash script with a "pure" UNC (i.e. I do not want to escape the backslashes literally) as an argument, i.e. something like: ./foo \\my\share\is\here However, as is natural, the ...
0
votes
0answers
16 views

What's the difference between `set` and `modify` in *nix command syntax

I'm creating a new custom script that will be able to add, modify|set and delete certain rules of DNS records. I was looking for a proper naming convention of *nix tools that might help me name the ...
0
votes
1answer
90 views

Passing variable in init.d script

I have the init.d script show below. I want to start the daemon with the argument --http_root /tv When I start the application without the daemon the argument is accepted However I cannot seem ...
3
votes
1answer
42 views

Shell expansion and positional parameters

I want to make an script equivalent to zgrep or bzgrep, but using tar. I made two very similar attempts and I would like to know if there is a better one and if they could be improved or they are ...
1
vote
1answer
18 views

How do I make an alias to substitute single word in a piped command? [duplicate]

I use aliases a lot but right now only for use cases like alias i='sudo apt-get install -y'. I often would like to add an alias in the following form: alias cmd='echo [something] >> ...
4
votes
2answers
64 views

Unzip source arguments

To copy a bunch of zip files from one location to another: $ cp *.zip destination/ To unzip a bunch of zip files to a directory: $ unzip \*.zip -d destination/ man unzip says: The backslash ...
0
votes
2answers
65 views

Why doesn't this pipe command work at this special bash script?

That script test.sh doesn't work after used pipe command. The result shows nothing. Why? #!/bin/bash fun=$( echo $1 ) echo "$fun" commands are as follows, $ echo 1 | ./test.sh
0
votes
2answers
72 views

Can't use argument in bash date calculation script

The following bash script won't work. I need to calculate the date depending on the number of days since 14th Oct 1582, where the argument will be the number of days. d="$1" date -d '14 Oct 1582 + ...
6
votes
1answer
184 views

Function that calls another function with list of arguments doesn't work

In my .bash_aliases I have defined a function that I use from the command line like this: search -n .cs -n .cshtml -n .html SomeTextIWantToSearchFor /c/code/website/ /c/stuff/something/whatever/ ...
1
vote
0answers
79 views

How to pass commandline arguments larger than 131k? [closed]

I want to get data out of a Virtualbox VM. You can define variables (called guestproperties) via commandline, which can be accessed from both the host and the VM. The amount of data for such a ...
2
votes
2answers
120 views

Optional arguments after or before the mandatory arguments?

I'm creating a shell script and I need it to take two mandatory arguments and one optional. How do I check that? In most scripts I've seen, the optional arguments are passed before the mandatory ones, ...
2
votes
1answer
202 views

Why am I getting “too many arguments”

Here's a part of my script that is telling me that I have too many arguments on line 3: #!/bin/bash export LC_ALL='C' if [ `echo "*file 2" | grep -o ^.` = '.' ] then echo success fi Anybody ...
0
votes
0answers
18 views

Find out which arguments an application supports

I have iOS Simulator.app on Mac. Is there a way to find out what arguments can be passed to the app through the command line?
1
vote
2answers
282 views

Check that a bash script has exactly two arguments which are directories

I'm writing a bash script that compares two directories, but I'm not sure how to check conditions For example, if the user enters 1 arg instead of 2 (we need 2 since we're comparing two directories), ...
1
vote
1answer
78 views

Understanding grep and pipes in linux

I came across this post which explains my problem. Suppose there is a file called file.txt which contains "foo World". The answer posted by Tyler explains a lot however I am confused as to how cat ...
5
votes
1answer
93 views

How can I create an alias that passes additional arguments?

I have an executable that I use often: /dir1/dir2/dir3/dir4/executable argv[1] argv[2] argv[3] I know that I can set an alias for the executable: alias myexecutable = ...
3
votes
2answers
47 views

How is it possible to execute a command with an unknown number of arguments in a POSIX shell?

I want to search for multiple words inside the current directory. To accomplish this I use something like this. grep -e "word1" -e "word2" -R . This works fine. Taking this one step further, I ...
1
vote
2answers
334 views

Pass arguments to a command run by another user

I have a bash script that is supposed to take some arguments and then run in a different user: test.sh #!/bin/bash sudo su user2 <<'EOF' echo $1 EOF However it prints blank: $ ./test.sh ...
2
votes
2answers
515 views

bash how to remove options from parameters after processing

I remember having seen somewhere a bash script using case and shift to walk through the list of positional parameters, parse flags and options with arguments when it encounters them, and removes them ...
2
votes
4answers
135 views

Modify bash arguments if only one argument is set

I created a script with the standard getopt magic, so you can call the script with batman-connect -c ffki How can I add an option to call this script with only one option without dash? ...
7
votes
2answers
751 views

Bash string concatenation used to build parameter list

Given this piece of bash: PARMS='-rvu' PARMS+=" --delete --exclude='.git'" echo $PARMS rsync ${PARMS} . ${TARGET} The echo shows the PARMS string as expected, no error is displayed, but rsync ...
2
votes
1answer
51 views

How to get clicked-on filename as argument of shell script triggered by this mouse-click

If, in Ubuntu's Nautilus, I click a midi-file, a window opens to specify an application for processing the file. Another option is a "user generated command" (UGC). (Let me choose Ubuntu, Nautilus, ...
4
votes
3answers
136 views

Passing arguments from one command into the next

I'm trying to write a script to unify two separate commands I run by hand into a single bash script I can then cron. The first command is a simple find on files with a certain name and size find ...
3
votes
0answers
604 views

When do I need to specify add_efi_memmap as kernel argument in UEFI/EFI boot?

I am reading some tutorials how to EFI stub (efistub) load the Linux kernel. These instructions often use kernel boot parameter add_efi_memmap. The intended hardware is Intel x64 having 8GB of RAM. My ...
0
votes
2answers
152 views

Shell script to work on files in some directory

I am a noob in Linux hence this might come as a silly question. I have a Windows system, so I downloaded cygwin to help me execute Linux/unix commands. I need to execute a shell script on a bunch of ...
5
votes
2answers
296 views

How do you get fgrep to find the literal “--help”?

fgrep --help | fgrep "--help" returns just the whole fgrep --help, how do I return just the lines that have the literal "--help" in them? The quotes don't do anything, nor does \-\-help.
3
votes
1answer
75 views

scp to an alias

To transfer a folder from my local host to a remote host, I normally do: $ scp -r myFolder user@host:destFolder/ Trying to make this easier, I aliased the remote host destination: $ alias ...
0
votes
1answer
192 views

Mandatory argument for script to run java program

My script is called: report_startDate It has the following line: $JRE_ROOT/bin/java -cp /home/me/report/config/:/home/me/report/jar/reporting-1.0-SNAPSHOT.jar com.me.project.report.Main $1 $1 ...
22
votes
1answer
571 views

When and how was the double-dash (--) introduced as an end of options delimiter in Unix/Linux?

I don't think the shell/utilities in historical Unix nor in something as "recent" as 4.4BSD supported using a double-dash(or two consecutive hyphens) as an end of options delimiter. With FreeBSD, you ...
35
votes
7answers
3k views

Is `-` used only with cd?

cd - can switch between current dir and previous dir. It seems that I have seen - used as arguments to other commands before, though I don't remember if - means the same as with cd. I found that - ...
0
votes
1answer
120 views

Must pass urls in quotes

I'm trying pass a URL to mpv for it to play it as a network stream. This can be done in bash with the following syntax: $ mpv http://myvideosite.com However, zsh wants to evaluate the URL as ...
2
votes
2answers
734 views

Pass argument to script, then redirect script as input to bsub

I am currently working with the bsub job submission system from Platform LSF. I need to submit job scripts, but I am running into a problem with passing arguments to the job script. What I need is as ...
4
votes
2answers
950 views

Add arguments to bash -c

Let say that I want to run a command through bash like this: /bin/bash -c "ls -l" According to bash man page, I could also run it like this: # don't process arguments after this one ...
0
votes
1answer
130 views

Pass list of folders to zip command

I have a folder which contains lot's of folders in it. I don't need to zip all of them and I have a list of folders that need to be zipped in a separate file The folder list is in the following ...
1
vote
1answer
69 views

How to enclose a quoted variable in quotes

I want to call: ./mjpg_streamer -i "./input_uvc.so -r 320x240" -o "./output_http.so -w ./www" from a C program, running system(). The problem is that I have to enclose shell command in quotes, which ...
8
votes
3answers
1k views

Why do some commands not read from their standard input?

I wonder what when we should use pipeline and when we shouldn't. Say for instance, to kill certain process which handling pdf files, the following will not work by using pipeline: ps aux | grep pdf ...
1
vote
1answer
113 views

Kill all queued jobs

I need to kill all the queued and running jobs on my ID. I have tried at -l | awk '{print $1}'| at -r {} But I keep getting {} does not exist Which leads me to believe that I am parsing ...
0
votes
1answer
356 views

Bash Script : Passing a variable to a bash script that contains quotes, single quotes. etc [closed]

lets assume this is the string: 'a',"b" it contains both single and double quotes. how would you pass this to a bash script as a single string ? this is the bash script: #!/bin/bash echo $1 ...
3
votes
3answers
378 views

Can I chain pgrep with kill?

I have noticed that | is used to send results of first command to the another. I would like to kill all processes that match a name. This is what pgrep normally does: $ pgrep name 5089 5105 And ...
1
vote
1answer
640 views

Pipe output from one command to another command's non standard input [duplicate]

I would like to do something similar to the following: which someapplciation | cd outputfrompreviouscommand The command which provides a directory and I would like to be able to make that output my ...
10
votes
4answers
14k views

Passing named arguments to shell scripts

Is there any easy way to pass (receive) named parameters to a shell script? For example, my_script -p_out '/some/path' -arg_1 '5' And inside my_script.sh receive them as: # I believe this ...
2
votes
2answers
333 views

Arguments, options and dashes

Why do console applications get the arguments started with either: a) one dash (myapp -arg1 123; ls -al) b) two dashes (myapp --arg1 123; git push origin master --force) c) without dashes at all ...
7
votes
2answers
8k views

Solving “mv: Argument list too long”?

I have a folder with more than a million files that needs sorting, but I cant really do anything because mv outputs this message all the time -bash: /bin/mv: Argument list too long I'm using this ...
1
vote
2answers
115 views

Default function arguments (manually emitting bash psuedo-signals)

I'm looking for a solution that will automatically allow me to call a function with specific parameters in a certain situation. Here is the specific scenario: When an error occurs, I can set up my ...
6
votes
1answer
181 views

How to specify additional parameters for GNU sort's --compress-program option?

sort --compress-program=/bin/gzip works fine, but how can I pass options down to the compression programm (e.g. --best or --fast)? sort --compress-program=/bin/gzip\ --best failes with the error ...
0
votes
3answers
6k views

How to write a Java Program / Shell Script combination such that you can call the Java program as a remote command and yet supply a local file?

This is related to How to execute a remote command on a local file? I wrote a simple Java program that prints the first line of a file - import java.io.BufferedReader; import ...
10
votes
3answers
2k views

What defines the maximum size for a command single argument?

I was under the impression that the maximum length of a single argument was not the problem here so much as the total size of the overall argument array plus the size of the environment, which is ...