Questions about bash only, as opposed to other Bourne/POSIX shells. For all Bourne/POSIX-style shells, use the /shell tag instead.

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1answer
20 views

How to convert Log file to CSV using bash

Is it possible to turn this log entry into a properly formatted csv file using sed/awk? I've tried multiple ways to do this using sed/awk. Alas I couldn't do it. Before I do it in perl. is this ...
1
vote
0answers
31 views

How to get tab completion when using curly braces in Bash

I want to have tab completion when using curly braces in a command in bash. For example: cp ~/html/{foo bar.txt whatever} /var/www/html/ I want the tab completion for the files stated in the curly ...
2
votes
3answers
66 views

Using find with 2 sets of variables

I want to be able to run a find command in my bash script that will find files based on two seperate variables. I've gotten this far but I'm not sure how to get the final result workingfind . -user ...
0
votes
2answers
28 views

Untar and gzip from multiple sub directories

I have a directory which consists of multiple sub-directories. Each subdirectory has a tar.gz file which on untar gives two files namely R1.fastq and R2.fastq. I want to untar the tar file and ...
0
votes
1answer
23 views

Opening a socket in Kali Linux using bash scripts

I know how to open a TCP or UDP socket in Ubuntu, with the following command : exec 3<>/dev/tcp/google.com/80 for example: we can open a TCP socket on port 80, but in Kali Linux there's no ...
1
vote
1answer
35 views

Read a character from an x-y coordinate on the screen

Is there a way in bash to read a character from an x-y coordinate on the screen? This command would be something similar to cget 12 30 which would return the character at the 12th row and 30th ...
0
votes
2answers
18 views

redirect output from interface?

I am echoing an AT command to a modem interface (/dev/ttyUSB3) and the command runs successfully. For instance the below command works and has an output of OK: echo -e "ATZ\r" > /dev/ttyUSB3 I ...
0
votes
2answers
14 views

The best way to add Unix Shell variables to CURL GET request

Let’s say I use curl –X GET command with the following link: “$WEBSITE_URL/ACTION_NAME/ACTION1;id=$ID?Command=TEST&id1=$ID1&id2=$ID2&id3=$ID3” As you can see, there are some $variables ...
0
votes
1answer
23 views

I don't see .bashrc file in my /home and /etc/skel direcories

I am running linux mint 17.1 rebecca, but I have found it quite different with other distros I am used to, in /home and /etc/skel there's no .bashrc I don't know if i mess up with something or it is ...
0
votes
1answer
17 views

Tar Create and Split files into subdir

I have this command: tar -cf - input/* | split --bytes=1m Which splits my huge gz files into small ones. This works fine. However I want the output (the small files) to be created in the input/ ...
0
votes
1answer
9 views

Universal .bashrc alias showing results of sysytemctl start command

This is small .bashrc alias that allows me to see results of starting service alias systemctl start apache='systemctl start apache && echo SUCCESS || echo failure' How can i modify to work ...
1
vote
2answers
33 views

Do programs source .bashrc when run?

I append to my PATH environment variable in my .bashrc file (Ubuntu v12). I also have a service (Atlassian Bamboo) that relies on the modifications to PATH. When I restart the service (which runs as ...
2
votes
2answers
52 views

Using the output of `grep` as variable in second command

I currently have 2 bash command line strings I use to gather data needed for a certain task. I was trying to simplify and have only one command used to gather the data without using a script. First I ...
2
votes
1answer
15 views

Is there an alternative to using rbash to restrict a user on my system?

Basically at the moment I am using rbash to stop a user from leaving his directory on my system. The problem with this is, there is a script in my bin which he needs to be able to run from a script in ...
1
vote
2answers
48 views

ls .. doesn't work properly with symlinks

I have directories set up a bit like this ~/code ~/code/src ~/code/build -> /path/to/somewhere/else That last one's a symlink. If I do this cd ~/code/build ls .. then I get the listing for ...
1
vote
3answers
204 views

How to copy files from the folder without the folder itself

I'm trying to copy files and subfolders from A folder without the A itself. For instance, A folder contains next: | file1.txt | file2.txt | subfolder1 Executing next command gives me ...
8
votes
2answers
382 views

Run another command before running the command the user wants to run

Let's say I want to modify the original behavior of the ls tool this way: $ ls Hello World file1 file2 ... How can I do this? When running ls I would like to run another command let's say echo ...
11
votes
3answers
567 views

Terminal vs bash? [duplicate]

I'm on a Mac but I think this is generally Unix-applicable. I'm in the process of learning shell scripting and there's something I seem to be missing. When I'm in the ordinary terminal, I can use ...
1
vote
1answer
49 views

bash - command not found [on hold]

I have a script [pic@pic Desktop]$ cat skrypt.sh #!/bin/bash awk '{sub(/#echo "Wstałem"/,"#echo \"Wstałem\""); print $0 > "skrypt.sh"}' skrypt.sh awk '{sub(/awk/,"#awk"); print $0 > ...
1
vote
3answers
27 views

Loop to check whether a Debian package is installed or not

I like to check whether several packages are installed or not on Debian/Ubuntu Here is my attempt at a script to do this: query=`dpkg-query -W -f '${Status}'` ok="install ok" if ! [ `$query` curl ...
1
vote
1answer
51 views

Example for adding

Example 1. Adding to the console works well pic@pic:~/Desktop$ a="$(date +%s)" pic@pic:~/Desktop$ b="$(date +%s)" pic@pic:~/Desktop$ echo $[a+b] 2844184057 pic@pic:~/Desktop$ Example 2. It's the ...
1
vote
1answer
28 views

Sourcing a redistributable script by default

I am creating a bash script which I wish to release on github. The script needs to access the command history but this is not possible without sourcing that script. I don't want users to put it in ...
1
vote
1answer
43 views

How to execute 'clear' bash command before any other command is executed?

I see the question at Can I configure bash to execute "clear" before every command typed in the console?, but the answers there are not valid for GNU bash, version 3.2.53(1)-release ...
1
vote
2answers
46 views

BASH: Command not running, special character '�' suddenly appeared (Ubuntu)

When I erroneously type 'ñ' (expecting to type any command) and then remove it and type the correct letter, the output returns the command with a special character attached �, obviously the shell ...
4
votes
2answers
156 views

Appending works without >> when redirecting standard output and error

I have a file test.txt and have no file named test. When I tried ls test test.txt > new 2>new I was expecting new to be overwritten since >> is not used. But in the output file I got ...
0
votes
0answers
13 views

Escape ampersand in bash variable used as a sed argument [duplicate]

I have a template Hello NAME welcome and want to replace NAME with data like "Judy&Mary". Why does this not work? TEMPLATE="Hello NAME welcome" DATA="Judy&Mary" echo $TEMPLATE | sed -e ...
1
vote
2answers
47 views

Read line from file then delete

How can I read a series of lines from a file and then remove each line? Obviously I can read like this: while read -r line; do echo $line done < myfile.txt But if I do this: while read -r ...
-1
votes
1answer
22 views

Check exist file on another pc

Yesterday I had ask how to use my tftp protocol in my bash script: Debian - Using TFTP in a bash script And now I have a problem with my tftp protocol. The file who was taken depend of my Hostname. ...
0
votes
2answers
18 views

Turn off mail notification in terminal

I'm running some cron jobs on my machine and every time I fire up a terminal session I'm getting a 'You have mail' message (the job produces output on success which gets mailed to me). Any way to ...
2
votes
2answers
56 views

Command to output to current prompt

Is there any command that will output text to the (next) command prompt? I would like to write a function, which upon execution, will perform some commands and then "suggest" the next command to be ...
1
vote
1answer
36 views

How can I use regex to extract the text following two conditions into a variable?

I'd like to extract a setting for a given host in the ssh_config file and put it into a variable. Host mysite HostName 123.1.1.1 User myuser Port 13245 GSSAPIAuthentication no ...
0
votes
0answers
55 views

Bash script parsing problems [on hold]

I created a script that would comb through SSH output on my Minecraft server for a particular expression and the resulting lines would be sent to xargs and then to curl so they could be pushed to my ...
0
votes
4answers
102 views

How do i change the case (upper and lower case) of strings in my variable?

"Enter test: " read test if [[ $test == "a" ]]; then echo "worked" else echo "failed" fi It's a simple illustration of test i'm doing, but if i enter "A", it will fail, is there anything i ...
1
vote
0answers
18 views

How to make sure to get the Main/External IP without regard to network device type/name

Hello, I need to make sure I have the external or at least the main IP address for a given machine, regardless to the device type/name. I quickly wrote that tiny script for that purpose, but I need ...
1
vote
1answer
31 views

Correct syntax to avoid bash 'ambiguous redirect' message

I am trying to execute a command which accumulates stdout into an existing file and sends the error messages to another using the command below. commmand >> /home/user/accumulate_output.log ...
0
votes
1answer
29 views

Debian - Using TFTP in a bash script

I'm actually using RPiTC (Raspberry Pi Thin Client). I had create a script to see if my Hostname has the same name than a file. And now I want to say "If my Hostname don't have the same name than my ...
0
votes
4answers
46 views

bash script, list all the files over a specific size

so I have a line of code like this: result=`find . -type f -size -1000c -print0 | xargs -0 ls -Sh | head` for i in $result; do item=`wc -c $i` echo $item1 done this will print out all the ...
3
votes
3answers
146 views

Piping a script with “read” to bash

I need to run a script by piping it through bash with wget(rather than running it directly with bash). $ wget -O - http://example.com/my-script.sh | bash It's not working because my script has read ...
0
votes
1answer
43 views

Bash script, ask for user input, to change a directory, sub directorys, and file's mtime atime linux recursively

Using GNU bash, version 4.3.11(1)-release (x86_64-pc-linux-gnu) I am a bash scripting novice, not sure where to begin except at shebang #!. The following command. touch -a -m -t 201501010000.00 ...
3
votes
4answers
76 views

fgrep beginning of line?

I'd like to use fgrep to handle searching literal words with periods and other meta-characters in grep, but I need to ensure the word is at the beginning of the line. For example, fgrep 'miss.' will ...
2
votes
2answers
27 views

“dpkg -l” receives shell wildcard character?

In a bash shell where I have globbing enabled if I execute ls -l *ou*, then shell should pass out.dot and out.png as arguments to ls, i.e. ls never sees the * character. However, looks like in case of ...
0
votes
2answers
40 views

Delete last character of last item in a bash array

I have such array: Array={123},{456} Now I want to delete the last item 6.
1
vote
0answers
20 views

Connecting 3 OpenVPN connections through a shell script

For work I need to connect to 3 different OpenVPN connections every day. I'm using a shell script to speed this up, but I feel like it could be done better. Currently my script is: #!/bin/bash cd ...
0
votes
2answers
40 views

Bash variable substitution problem

I have a problem with variable substitution in bash. I'm doing like as explained in below code, but cd $d is not going into original directory i.e. after expanding $var export var="/a/b/c" for d ...
0
votes
1answer
57 views

Run a command under sudo over SSH

I am accessing remote machine in Linux using Bash scripting.My code is as follows #!/bin/bash ssh -i manu_bp.pem ubuntu@54.68.67.68 <<EOF sudo -s cat ...
2
votes
2answers
40 views

How can I invoke a prompt for an ssh key passphrase during the execution of a script?

In my ssh_config file there are multiple entries for sites on the same server such as: Host site1 HostName 123.1.1.1 User myuser Port 13245 GSSAPIAuthentication no ...
-2
votes
2answers
24 views

How to use shift to shift $@ one over

I am running a shells script with 3 arguments. I am getting the word count of each one. But I want to skip over the very first argument, maybe by using shift or something else. Most of the examples ...
2
votes
3answers
89 views

How can I insert the contents of a file into a string in bash

I would like to append the contents of a multi-line text file after a particular line in a string. For example, if the file file.txt contains line 1 line 2 I'd like do so something like printf ...
2
votes
2answers
47 views

How to append word count of file to file without adding the total

I am running a bash script where I am appending the line count of the arguments, which are files, to another file. It does it correctly, but I keep getting a line that says "total X", X being the sum ...
0
votes
1answer
30 views

How to make $@ start one iteration ahead

I'm running a bash script and am reading file contents of each one, but I want to skip the first one. I know of the "shift" command, but I'm having trouble getting it to go one over. I currently have ...