Valentyn Hruzytskyi's questions

The microphone doesn't work with Skype. When I delete pulseaudio from the system the microphone works well, but in this case the audio disappears in the browsers. Audio works with Skype, works with media player, but not with browser.

So I can use somes one: or microphone with Skype, or audio with browser. How to use both?

I installed the utorren server ( instruction used)

After all I launched utserver and tried join with localhost:8080/gui but got the 404 error in the result.

Please help me to solve this issue

In ubuntu we can see a list of files with permissions, simply using the commandls -l. But can I add the filter in this case? For example, a list of all files that are permission set to read only?

I need save into variable the file content (json string).

I try several methods, in particular:

#!/bin/bash

myjson=cat patch/file.jsn

but nothing not work.

How to correctly implement this task?

I need the launch jar process and sent request to him:

    java -jar parser-0.0.1-SNAPSHOT.jar
    curl -d '{"query":"'"$query"'", "turnOff":true}' -H "Content-Type: application/json" -X POST http://localhost:8080/explorer > FQ

But, when the .jar file is successfully launched - the system stops and not moved to next step (curl...)

How can I completely wait for the process to complete and send request?

I need set into variable true/false value and send him into json with curl command:

name=$1
sx=$2

`curl -d '{"name":"'"$name"'", "sex":true}' -H "Content-Type: application/json" -X POST http://localhost:8080/setacc`

Variable sx accepts the value male or female how to set the appropriate boolean value into sex variable?

I try to implement positional parameters in bash script and check them, but have some issue in if/then switch statement.

Script:

#set "default" parameter
query=""                                          

while [ "$1" != "" ]; do
    case $1 in
        -q | --query )          shift
                                query=$1
                                ;;
    esac
    shift
done                            

#query cannot be empty
if (($query == ""))                               
then
 echo 'no query'
 exit
fi

echo "query - $query"

All works well when I set the correct parameters:

$ ./script.sh -q request
query - request

-q parameter cannot be empty and I need to validate it. So, when the command line looks like:

$ ./script.sh -q

or

$ ./script.sh

I get this error:

./main.sh: line 13: ((: == : syntax error: operand expected (error token is "== ")
query - 

How to correctly implement if operator in this case?

I have a array with a few string values, and I correctly can out it in console:

for element in "${answers[@]}"
do echo $element
done

out:

1

2

5

But I need do some command for each value in array:

For example this implementation does not execute any action:

for element in "${answers[@]}";
do 

#    switch $element {
    case $element in
       1)
        echo "install app 1";;
       2)
        echo "install app 2";;
       3)
        echo "install app 3 ";;
esac 
done

In follow attempt:

for element in "${answers[@]}";
do

    switch $element {
    case "1": echo "install app 1";;
    case "2": echo "install app 2";;
    case "3": echo "install app 3";;
}
done

I have exception:

./prepare_2.0.sh: line 15: syntax error near unexpected token echo' ./prepare_2.0.sh: line 15: case "1": echo "install app 1";;'

How to correctly implement this logic?

I'm creating script that runs commands based on information from a checklist dialog:

dialog --checklist "Choose what you want to install:" 0 0 0  1 mysql on 2 java on  3 git off 2> tempfile

I have the correct data in tempfile (1 2), but I don't know how to use this data in future in my script.

I have an bootable flash-card (with acronis (not my installation)), I may read but cannot copy file into it. When I uses windows, then I not have any problem, but I cannot use this card in ubuntu - have error Read-only file system

~ $sudo cp -f vbinst.sh /media/valeriy/TERMINAL/
[sudo] password for valeriy: 
cp: cannot create regular file '/media/valeriy/TERMINAL/vbinst.sh': Read-only file system

$ sudo fdisk -l

Disk /dev/sda: 931,5 GiB, 1000204886016 bytes, 1953525168 sectors
Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical):
512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096
bytes Disklabel type: gpt Disk identifier:
9F6D513D-4906-4670-9DF3-57280CEF2E8B

Device         Start       End   Sectors  Size Type
/dev/sda1       2048   3905535   3903488  1,9G Linux swap
/dev/sda2    3905536 199217151 195311616 93,1G Linux filesystem
/dev/sda3  199217152 394528767 195311616 93,1G Linux filesystem

Disk /dev/sdb: 119,2 GiB, 128035676160 bytes, 250069680 sectors Units:
sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512
bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: gpt Disk identifier:
278B77A6-1ACA-45F8-8C6A-13727B72BA6F

Device         Start       End   Sectors   Size  Type
/dev/sdb1       2048    739327    737280   360M  EFI System
/dev/sdb2     739328   1001471    262144   128M  Microsoft reserved
/dev/sdb3    1001472 246554623 245553152 117,1G  Microsoft basic data
/dev/sdb4  246554624 250058751   3504128   1,7G  Windows recovery environment


**Disk /dev/sdc: 14,6 GiB,** 15676211200 bytes, 30617600 sectors Units:
sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512
bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos Disk identifier: 0x018ae7e6

Device     Boot    Start      End  Sectors  Size Id Type
/dev/sdc1             63 30617599 30617537 14,6G  c W95 FAT32 (LBA)

$ mount

- sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime) 
- proc on /proc type proc (rw,nosuid,nodev,noexec,relatime) 
- udev on /dev type devtmpfs (rw,nosuid,relatime,size=4007548k,nr_inodes=1001887,mode=755) 
- devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000) 
- tmpfs on /run type tmpfs (rw,nosuid,noexec,relatime,size=806368k,mode=755) 
- /dev/sda3 on / type ext4 (rw,relatime,errors=remount-ro,data=ordered) 
- securityfs on /sys/kernel/security type securityfs (rw,nosuid,nodev,noexec,relatime) 
- tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev) 
- tmpfs on /run/lock type tmpfs (rw,nosuid,nodev,noexec,relatime,size=5120k) 
- tmpfs on /sys/fs/cgroup type tmpfs (rw,mode=755) 
- cgroup on /sys/fs/cgroup/systemd type cgroup (rw,nosuid,nodev,noexec,relatime,xattr,release_agent=/lib/systemd/systemd-cgroups-agent,name=systemd) 
- pstore on /sys/fs/pstore type pstore (rw,nosuid,nodev,noexec,relatime) 
- efivarfs on /sys/firmware/efi/efivars type efivarfs (rw,nosuid,nodev,noexec,relatime) 
- cgroup on /sys/fs/cgroup/hugetlb type cgroup (rw,nosuid,nodev,noexec,relatime,hugetlb,release_agent=/run/cgmanager/agents/cgm-release-agent.hugetlb) 
- cgroup on /sys/fs/cgroup/net_cls,net_prio type cgroup (rw,nosuid,nodev,noexec,relatime,net_cls,net_prio)
- cgroup on /sys/fs/cgroup/freezer type cgroup (rw,nosuid,nodev,noexec,relatime,freezer) 
- cgroup on /sys/fs/cgroup/cpu,cpuacct type cgroup (rw,nosuid,nodev,noexec,relatime,cpu,cpuacct) 
- cgroup on /sys/fs/cgroup/cpuset type cgroup (rw,nosuid,nodev,noexec,relatime,cpuset,clone_children) 
- cgroup on /sys/fs/cgroup/blkio type cgroup (rw,nosuid,nodev,noexec,relatime,blkio) 
- cgroup on /sys/fs/cgroup/devices type cgroup (rw,nosuid,nodev,noexec,relatime,devices) 
- cgroup on /sys/fs/cgroup/pids type cgroup (rw,nosuid,nodev,noexec,relatime,pids,release_agent=/run/cgmanager/agents/cgm-release-agent.pids) 
- cgroup on /sys/fs/cgroup/perf_event type cgroup (rw,nosuid,nodev,noexec,relatime,perf_event,release_agent=/run/cgmanager/agents/cgm-release-agent.perf_event) 
- cgroup on /sys/fs/cgroup/memory type cgroup (rw,nosuid,nodev,noexec,relatime,memory) 
- systemd-1 on /proc/sys/fs/binfmt_misc type autofs (rw,relatime,fd=27,pgrp=1,timeout=0,minproto=5,maxproto=5,direct,pipe_ino=16717) mqueue on /dev/mqueue type mqueue (rw,relatime) 
- debugfs on /sys/kernel/debug type debugfs (rw,relatime) fusectl on /sys/fs/fuse/connections type fusectl (rw,relatime) 
- hugetlbfs on /dev/hugepages type hugetlbfs (rw,relatime) 
- /var/lib/snapd/snaps/heroku_3534.snap on /snap/heroku/3534 type squashfs (ro,nodev,relatime) 
- /var/lib/snapd/snaps/heroku_3560.snap on /snap/heroku/3560 type squashfs (ro,nodev,relatime) 
- /var/lib/snapd/snaps/core_5145.snap on /snap/core/5145 type squashfs (ro,nodev,relatime) 
- /var/lib/snapd/snaps/heroku_3538.snap on /snap/heroku/3538 type squashfs (ro,nodev,relatime)
- /var/lib/snapd/snaps/core_5328.snap on /snap/core/5328 type squashfs (ro,nodev,relatime) 
- /dev/sdb1 on /boot/efi type vfat (rw,relatime,fmask=0077,dmask=0077,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro) 
- /dev/sda2 on /home type ext4 (rw,relatime,data=ordered) 
- binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw,relatime) 
- cgmfs on /run/cgmanager/fs type tmpfs (rw,relatime,size=100k,mode=755) tmpfs on /run/user/1000 type tmpfs (rw,nosuid,nodev,relatime,size=806368k,mode=700,uid=1000,gid=1000)
- gvfsd-fuse on /run/user/1000/gvfs type fuse.gvfsd-fuse (rw,nosuid,nodev,relatime,user_id=1000,group_id=1000) 
- gvfsd-fuse on /home/valeriy/.gvfs type fuse.gvfsd-fuse (rw,nosuid,nodev,relatime,user_id=0,group_id=0)
- /dev/sdc1 on /media/valeriy/TERMINAL type vfat (ro,nosuid,nodev,relatime,uid=1000,gid=1000,fmask=0022,dmask=0022,codepage=437,iocharset=iso8859-1,shortname=mixed,showexec,utf8,flush,errors=remount-ro,uhelper=udisks2)

How to resolve this task but not crack flash-card?

I try to write a script, which create database and tables in it.

For example, my bash file create attempt:

#!/bin/bash

mysql -u root -p
use dbname;
create......
.......
exit;

Is executed joining into mysql console and that all. Script not create any table in database and not executed exit from mysql console.

How to correct create the script for that task?

I launched on server, by crontab few jar (java) files (part1.jar, part2.jar...).

I can get are data of process:

lsof -i tcp:8080

COMMAND   PID USER   FD   TYPE  DEVICE SIZE/OFF NODE NAME
java    15287 root   26u  IPv6 3242442      0t0  TCP *:http-alt (LISTEN)

How to know which exactly jar file running now? I am mean name of file.

That I have:

I have some commands in crontab, for example:

55 11 * * * curl -d '{"explorerId":'$(cat /root/id)', "turnOff":true}' -H "Content-Type: application/json" -X POST http://localhost:8080/descriptions >> log/curl.log 2>&1

This command do something and saves result in file curl.log

That to need:

I want, that to each note adds a string with information, like:

Date: 15.09.2018. 
Execute command: description
Result:

#...result of log from curl command

I have some task in cron scheduler:

40 07 * * * value=$(curl -d '{"query":"java-middle", "turnOff":true}' -H "Content-Type: application/json" -X POST http://localhost:8080/explorer)

• The Value accept a json in string format
• how to save a value (or result of curl command) in file and get them in future tasks?

I want know model and characteristics of my wifi card. How to do it in ubuntu?

I have a bash file:

#!/bin/bash

# yesnobox.sh - An inputbox demon shell script
OUTPUT="/tmp/input.txt"

# create empty file
>$OUTPUT

# cleanup  - add a trap that will remove $OUTPUT
# if any of the signals - SIGHUP SIGINT SIGTERM it received.
trap "rm $OUTPUT; exit" SIGHUP SIGINT SIGTERM

# show an inputbox
dialog --title "Inputbox" \
--backtitle "Search vacancies" \
--inputbox "Enter your query " 8 60 2>$OUTPUT

# get respose
respose=$?

# get data stored in $OUPUT using input redirection
name=$(<$OUTPUT)

curl -d '{"query":"developer", "turnOff":true}' -H "Content-Type: application/json" -X POST http://localhost:8080/explorer

in last string (curl command) I want to set variable name instead "developer". How to correctly insert it?

How to write a script that kills a java process?

From console it looks like

root@ubuntu-s-1vcpu-1gb-ams3-01:~# lsof -i tcp:8080
COMMAND  PID USER   FD   TYPE  DEVICE SIZE/OFF NODE NAME
java    9657 root   26u  IPv6 4694148      0t0  TCP *:http-alt (LISTEN)
root@ubuntu-s-1vcpu-1gb-ams3-01:~# kill 9657

How should it be implemented in .sh file?

I create a simply script in /root/test.sh file:

#!/bin/bash
echo "hello"
mkdir newdir

next:

chmod +x /root/test.sh

We can convinced, what test.sh is owned by root:

root@ubuntu-s-1vcpu-1gb-ams3-01:~# find /root -user root /root
/root/test.sh

So, my crontab:

root@ubuntu-s-1vcpu-1gb-ams3-01:~# crontab -l
SHELL=/bin/bash
PATH=/sbin:/bin:/usr/sbin:/usr/bin

* * * * * /root/test.sh

(Also i did try with run-parts:

* * * * * root run-parts /root/test.sh

)

No one method not run my script, not out "hello" and not create a newdir directory.

service cron status:

root@ubuntu-s-1vcpu-1gb-ams3-01:~# service cron status
● cron.service - Regular background program processing daemon
   Loaded: loaded (/lib/systemd/system/cron.service; enabled; vendor preset: enabled)
   Active: active (running) since Sat 2018-08-18 15:46:42 UTC; 23h ago
     Docs: man:cron(8)
 Main PID: 1340 (cron)
    Tasks: 1
   Memory: 26.8M
      CPU: 7.982s
   CGroup: /system.slice/cron.service
           └─1340 /usr/sbin/cron -f

Aug 19 15:16:01 ubuntu-s-1vcpu-1gb-ams3-01 CRON[439]: (root) CMD (root run-parts /root/test.sh)
Aug 19 15:16:01 ubuntu-s-1vcpu-1gb-ams3-01 CRON[438]: (CRON) info (No MTA installed, discarding output)
Aug 19 15:16:01 ubuntu-s-1vcpu-1gb-ams3-01 CRON[438]: pam_unix(cron:session): session closed for user root
Aug 19 15:17:01 ubuntu-s-1vcpu-1gb-ams3-01 CRON[1032]: pam_unix(cron:session): session opened for user root by (uid=0)
Aug 19 15:17:01 ubuntu-s-1vcpu-1gb-ams3-01 CRON[1031]: pam_unix(cron:session): session opened for user root by (uid=0)
Aug 19 15:17:01 ubuntu-s-1vcpu-1gb-ams3-01 CRON[1033]: (root) CMD (root run-parts /root/test.sh)
Aug 19 15:17:01 ubuntu-s-1vcpu-1gb-ams3-01 CRON[1032]: (CRON) info (No MTA installed, discarding output)
Aug 19 15:17:01 ubuntu-s-1vcpu-1gb-ams3-01 CRON[1032]: pam_unix(cron:session): session closed for user root
Aug 19 15:17:01 ubuntu-s-1vcpu-1gb-ams3-01 CRON[1034]: (root) CMD (   cd / && run-parts --report /etc/cron.hourly)
Aug 19 15:17:01 ubuntu-s-1vcpu-1gb-ams3-01 CRON[1031]: pam_unix(cron:session): session closed for user root

every minutes cron tries do something, but, how I see - I haved message

session closed for user root

and nothing not happens.

What more I must to do?

========================================================================

after deleting the string [email protected] script correctly creats newdir directory. But yet not printed string 'hello'. So it works, but some issue in #echo "hello" string.