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2
votes
1answer
20 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
95 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
40 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
54 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
252 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
40 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
42 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 ...
19
votes
1answer
229 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 ...
30
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
32 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
86 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 ...
3
votes
2answers
113 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
36 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
45 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 ...
7
votes
3answers
723 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
39 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
110 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 ...
2
votes
3answers
70 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 ...
0
votes
1answer
95 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 ...
5
votes
3answers
2k 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
135 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 ...
3
votes
1answer
950 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
66 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
129 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
1k 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 ...
7
votes
3answers
421 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 ...
8
votes
3answers
310 views

How to execute a command repeatedly with different arguments?

I'm on Ubuntu. I copied some arguments (separated by newline) and I can use xsel to print them out like this $ xsel arg1 arg2 arg3 arg4 ... Now, I want to use each of these arguments for another ...
1
vote
1answer
33 views

Escaping dash in `dch` call

I'm using dch to modify the changelog for a debian package that is being built using some bash script. The messages for changelog are taken from some data source and are just passed to dch --append. ...
1
vote
2answers
145 views

get arguments passed and put it in an array

is there a way to make the arguments passed become the element of an array? I want to access those arguments individually through array. like this: ./script.ksh arg1 arg2 arg3 then it will become ...
1
vote
1answer
124 views

How can I use a loop inside a command?

I'm writing a shell script that contains a command that takes multiple directories as space-separated input arguments (like ls). I would like to fill in those arguments from a variable but don't know ...
1
vote
1answer
336 views

How to pass arguments to 'source' command?

My source command in the CShell goes like this : source /directory/of/script/script.csh The script.csh executes and in between, waits for my password to confirm the identity. I am tired of typing ...
1
vote
1answer
65 views

Bash: show prompts if arguments weren't provided

What is the best way of supporting in the script prompts and arguments at the same time? I want to show prompts if arguments weren't provided. Is there something better/shorter than this? ⇩ ...
4
votes
2answers
690 views

CP: max source files number arguments for copy utility

Consider that there are countless number of files under /src/ cp /src/* /dst/ How many files cp will successfully process?
3
votes
2answers
155 views

Command substitution interpreting spaces within quotes as argument separators

I'd like an alias that additionally appends itself to ~/.bashrc, e.g. function tailias { $(echo "alias $1='${*:2}'" | tee -a ~/.bashrc) } I'm using tee to split the command to ~/.bashrc while ...
1
vote
5answers
3k views

Pass the output of previous command to next as an argument

I've a command that outputs data to stdout (command1 -p=aaa -v=bbb -i=4). The output line can have the following value: rate (10%) - name: value - 10Kbps I want to grep that output in order to ...
1
vote
0answers
99 views

Mounting root filesystem while booting through network

I have two systems, let say one is the server and the other is the client. I want to load kernel image from the server to the client through the network. I used dhcp (isc-dhcp-server) and tftp ...
1
vote
1answer
102 views

Using sed output in another script or command

How can I use the output of sed in another script? For example (this doesn't work): sed -n "$COUNTER",1p /domains.csv | wget or sed -n "$COUNTER",1p /domains.csv > /myScript.sh As far as I ...
1
vote
1answer
236 views

How to use command line arguments in a shell script

I have a shell script and when invoking it ./test it asks for an input.I 've seen a quicker way just by writing at once ./test myInput ,how is that achievable?
3
votes
3answers
451 views

Correctly parse arguments in script behaving like a shell called through SSH

I have a server with a very limited used whom I want to be able to run two very specific (and custom) instructions through SSH. In order to do that, I have set the shell for that limited user to be a ...
3
votes
2answers
2k views

Bash globbing and argument passing

I have the following simplified bash script #!/bin/bash files=("$@") if [ "X$files" = "X" ]; then files=$HOME/print/*.pdf; fi for file in "${files[@]}"; do ls "$file"; done If I pass ...
2
votes
2answers
2k views

How do I echo just 1 column of output from ls command?

Lets say when I do ls command the output is: file1 file2 file3 file4 Is it possible to display only a certain column of output, in this case file2? I have tried the following with no success: echo ...
15
votes
2answers
507 views

How can I stream data to a program that expects to read data from a file that is given as a argument?

I have a huge gzipped file and I want a program (4s-import in this case) to read it. It takes a lot of time to first unzip the file and then call the program with the path to the file as an argument. ...
1
vote
2answers
105 views

Meaning of the following linux commands

cat "$1" > /tmp/file.$$ 2>/tmp/file0.$$ grep "*" /tmp/file.$$ >/tmp/file0.$$ I understood that in the cat command, if an error occurs, the error will be shown in file0.$$ and if it ...
0
votes
2answers
229 views

Making md5sum understand file names with spaces

I need to use md5sum in Python by using pipe to calculate checksum for a bunch of .mp3 files... is there a command which ignore whitespaces in filenames on the command line of md5sum program? For ...
3
votes
3answers
320 views

What is a “non-option argument”?

I am trying to understand info who but completly fail at the term »non-option argument«. Can someone please explain this term to me in simple words or an example? UPDATE: from ' info who' ...
2
votes
5answers
759 views

How to use filename arguments or default to stdin, stdout (brief)

I want to handle filenames as arguments in a bash script in a cleaner, more flexible way, taking 0, 1, or 2 arguments for input and output filenames. when args = 0, read from stdin, write to stdout ...
1
vote
1answer
68 views

devilspie detect if application was started with a flag

How can I set devilspie to detect if an application was started with the flag --hello-world from terminal? For example window_name detects the window title. How can transform in devilspie the ...
2
votes
3answers
297 views

Convert newline-delimited list with spaces into arguments

I'm trying to write a script that I can run from the context menu in Caja (a clone of Nautilus). Its purpose is to pass the files that are selected in the file manager to a given program (for example, ...
1
vote
1answer
408 views

--no-desktop and %U what for?

I want to know why is this argument so important when lauching nautilus or pcmanfm. What happens if i don't? Also, i want to know what is the meaning of %U for: Exec=pcmanfm %U
9
votes
2answers
2k views

How does ps know to hide passwords?

Witness: $ ps f PID TTY STAT TIME COMMAND 31509 pts/3 Ss 0:01 -bash 27266 pts/3 S+ 0:00 \_ mysql -uroot -p 25210 pts/10 Ss+ 0:00 /bin/bash 24444 pts/4 Ss 0:00 ...