As picture showed above, since mtr can only traceroute one host once, how can I "scan" the whole network (172.16.0.0/16) and find all the hosts which only got 2 hops, with a script?
Thank you.
#!/bin/bash
touch result
for ip in 172.16.{35..254}.{1..254}
do
echo "Trying $ip ... "
hops=$( mtr -c 5 -r -n4 -T $ip | wc -l )
if [[ "$hops" == 4 ]]; then
echo "Yes!"
echo $ip >> result
fi
done
For those who may need it, the simple way:
Related
As for linux, I can get the real-time of a process through /proc (process file system). But how can I get the data of the process on MacOS 12.4 since there is no /proc dir.
When using top command, I want to save the read-time output of a process to a text file (only the process info), but the interval is too large to get accurate result and I cannot strip the header of top via options. Is there any possible way to achieve this? On a phone, I can get the output of the top via the following script:
#!/bin/sh
export LANG="en_US.UTF-8"
if [ "$#" -ne 1 ]; then
echo "Illegal number of parameters" $#
exit 0
fi
while true; do
pid=`pgrep COMMAND`
if [ "$pid" -ne 0 ]; then
echo "${pid}\t`top -q -p $pid -n 1 -d 1`" >> $1
fi
usleep 100
done
I wonder whether it is possible to get the detailed info via /proc-like file system on MacOS?
I'm fairly new to node and nginx. I've a task of building a simple webserver which host dynamic contents. A very crucial part of the webserver is to take inputs from user about ports to be used , any custom domain to be used (in place of localhost) , SSL certificates etc. from installer [Its supposed to be built for docker ] but I have no idea how to execute a script such that is passes the variable entered by user ( like $SERVER_URI) to nginx.conf and node file and overwrite current data
I will suggest to create a config file and read the value from them so everything will be dynamic.
Here is how you can achieve SSL certificate and other ENV and port dynamically also docker name and image name will be get and set.
Create file docker.config which contain ports, ENV, path mapping, hosts values and links if you wish to link container. leave them blank
if you do not need them. remove host_port:container_port this entry
just for comment purpose.
docker.config
START_PORT_MAPPINGS
host_port:container_port
8080:80
END_PORT_MAPPINGS
START_PATH_MAPPINGS
/path_to_code/:/var/www/htlm/test
/path_to_nginx_config1:/etc/nginx/nginx.conf
/path_to_ssl_certs:/container_path_to_Certs
END_PATH_MAPPINGS
START_LINKING
db:db-server
END_LINKING
START_HOST_MAPPINGS
test.com:192.168.1.23
test2.com:192.168.1.23
END_HOST_MAPPINGS
START_ENV_VARS
MYSQL_ROOT_PASSWORD=1234
OTHER_ENV_VAR=value
END_ENV_VARS
create start.sh this will read the values from docker.config and will run command your docker container.
Need two arguments 1st: docker name and 2nd: image name.
function read_connfig() {
docker_name="${1}"
input="docker.config"
option_key=$(echo "${2}" | cut -d':' -f1)
config_name=$(echo "${2}" | cut -d':' -f2)
post_fix=$(echo "${2}" | cut -d':' -f3)
while IFS=$' \t\n\r' read -r line; do
if [[ $line == END_"${config_name}" ]] ; then
read_prop="no"
fi
if [[ $read_prop == "yes" ]] ; then
echo -n "${option_key}${line}${post_fix} "
fi
if [[ $line == START_"${config_name}" ]] ; then
read_prop="yes"
fi
done < "$input"
}
function get_run_configs() {
docker_name=${1}
declare -a configs=("-p :PORT_MAPPINGS:" "-v :PATH_MAPPINGS:" "--add-host=:HOST_MAPPINGS:" "-e :ENV_VARS:" "--link :LINKING:")
local run_command=""
for config in "${configs[#]}"
do
config_vals=($(read_connfig "${docker_name}" "${config}"))
if [ ! -z "${config_vals}" ];
then
for config_val in "${config_vals[#]}"
do
run_command="${run_command} ${config_val}"
done
else
echo >&2 "No config found for ${config}"
fi
done
echo "${run_command}"
}
container_name=$1;
image_name=$2
docker_command=$(get_run_configs $docker_name)
echo $docker_command
docker run --name $container_name $docker_command -dit $image_name
Resulting command will be. ./start.sh test test
docker run --name test -p host_port:container_port -p 8080:80 -v /path_to_code/:/var/www/htlm/test -v /path_to_nginx_config1:/etc/nginx/nginx.conf -v /path_to_ssl_certs:/container_path_to_Certs --add-host=test.com:192.168.1.23 --add-host=test2.com:192.168.1.23 -e MYSQL_ROOT_PASSWORD=1234 -e OTHER_ENV_VAR=value --link db:db-server -dit test
How to receive respond on Windows from printer after send PJL command?
I tried to spy network printer with WireShark and read printer socket directly but nothing work.
On windows is only possible with network printers with Paraphernalia. There is no bidirectional printer drivers for common models. So i have installed linux on virtualmachine.
I used the bidirectional USB driver on linux (the same drivers is on mint, *buntu distro) and execeute a pjl command from cmd.txt with this bash script below.
But i still cannot recognize when to read PJL Respond. Using fuser command to recognize /dev/usb/lp0 busy state does not work so i try to read in a loop with dd and check size of readback. It works but sometimes has to send PJL few times before got response.
#!/bin/bash
PRINTER=/dev/usb/lp0
ESCAPE=$(echo -e "\e")
FF=$(echo -e "\x0C")
char=
IFS=""
SSKIP=0
echo "" > a.txt
echo "" > b.txt
echo "" > temp.txt
while read p; do
echo -e "#######BEGIN$p-\r\n" >> a.txt
echo $p
while true
do
#WAIT FOR NOT BUSY
while true
do
fuser -s $PRINTER
if [ $? -ne 0 ]
then
break
fi
done
#send PJL to printer
echo -e "\e%-12345X#PJL\r\n#PJL INQUIRE $p \r\n\e%-12345X" > $PRINTER
#TRY TO READ IMMEDIATELY
char=$(dd if=$PRINTER of=temp.txt 2>&1)
#send escape after read
echo -e "\e" > "$PRINTER"
#CHECK THAT dd READ ANY BYTES
echo "$char" | grep "bytes copied" > /dev/null
if [ $? -ne 0 ]
then
printf "."
else
echo "$char" | grep "^0 bytes copied" > /dev/null
if [ $? -ne 0 ]
then
cat temp.txt >> b.txt
echo "" > temp.txt
break
else
printf "."
fi
fi
char=""
done
echo
echo -e "#######END$p-\r\n" >> a.txt
done <cmd.txt
I'm trying to automate a JMX command using a tool called JMXterm.
The script looks like so:
#!/bin/bash
beanstemp="/tmp/jmx_beans"
read -r -p "Enter server name in FQDN " scrapername
bean1="BrokerName=localhost,Connection=Scraper_$scrapername,ConnectorName=openwire,Type=Connection"
echo beans -d $domain | $cmd > $beanstemp
idnum=$(grep "ID_$scrapername" $beanstemp | grep openwire | awk -F- '{print $2"-"$3}')
idname="$scrapername-$idnum"
bean2="BrokerName=localhost,Connection=ID_"$idname"2_0,ConnectorName=openwire,Type=Connection"
domain="org.apache.activemq"
server="scrapermq.sj.peer39.com:1099"
cmd="java -jar Downloads/jmxterm-1.0-alpha-4-uber.jar -l $server"
echo run stop -b $bean1 -d $domain | $cmd -l $server
echo run stop -b $bean2 -d $domain | $cmd -l $server
When I run the script I get the proper response for the first command but the second one fails.
Here's the output of sh -x:
itaig#iganot-lt:~$ sh -x jmx.sh
+ beanstemp=/tmp/jmx_beans
+ read -r -p Enter server name in FQDN scrapername
Enter server name in FQDN selvmnj27.domain.company.com
+ bean1=BrokerName=localhost,Connection=Scraper_selvmnj27.domain.company.com,ConnectorName=openwire,Type=Connection
+ echo beans -d
+
+ + grep openwire
grep ID_selvmnj27.domain.company.com+ awk -F- {print $2"-"$3}
/tmp/jmx_beans
+ idnum=
+ idname=selvmnj27.domain.company.com-
+ bean2=BrokerName=localhost,Connection=ID_selvmnj27.domain.company.com-2_0,ConnectorName=openwire,Type=Connection
+ domain=org.apache.activemq
+ server=scrapermq.sj.peer39.com:1099
+ cmd=java -jar Downloads/jmxterm-1.0-alpha-4-uber.jar -l scrapermq.sj.peer39.com:1099
+ echo+ run stop -b BrokerName=localhost,Connection=Scraper_selvmnj27.domain.company.com,ConnectorName=openwire,Type=Connectionjava -jar -d Downloads/jmxterm-1.0-alpha-4-uber.jar -l org.apache.activemq scrapermq.sj.peer39.com:1099 -l
scrapermq.sj.peer39.com:1099
Welcome to JMX terminal. Type "help" for available commands.
$>run stop -b BrokerName=localhost,Connection=Scraper_selvmnj27.domain.company.com,ConnectorName=openwire,Type=Connection -d org.apache.activemq
#calling operation stop of mbean org.apache.activemq:BrokerName=localhost,Connection=Scraper_selvmnj27.domain.company.com,ConnectorName=openwire,Type=Connection
#operation returns:
null
$>+ + echo runjava stop -b -jar Downloads/jmxterm-1.0-alpha-4-uber.jar BrokerName=localhost,Connection=ID_selvmnj27.domain.company.com-2_0,ConnectorName=openwire,Type=Connection -l scrapermq.sj.peer39.com:1099 -l -d scrapermq.sj.peer39.com:1099
org.apache.activemq
Welcome to JMX terminal. Type "help" for available commands.
$>run stop -b BrokerName=localhost,Connection=ID_selvmnj27.domain.company.com-2_0,ConnectorName=openwire,Type=Connection -d org.apache.activemq
#InstanceNotFoundException: org.apache.activemq:BrokerName=localhost,Connection=ID_selvmnj27.domain.company.com-2_0,ConnectorName=openwire,Type=Connection
$>itaig#iganot-lt:~$
"Operation returns: null" is the response I'm looking for.
The problem begins with this line:
echo beans -d $domain | $cmd > $beanstemp
When it runs the output of the command should be written to the $beanstemp file but the file stays empty.
When I run the command manually from terminal it works:
itaig#iganot-lt:~$ echo beans -d org.apache.activemq | java -jar Downloads/jmxterm-1.0-alpha-4-uber.jar -l scrapermq.domain.company.com:1099 > /tmp/jmx_beans
Welcome to JMX terminal. Type "help" for available commands.
$>beans -d org.apache.activemq
#domain = org.apache.activemq:
$>itaig#iganot-lt:~$ tail -5 /tmp/jmx_beans
org.apache.activemq:BrokerName=localhost,Type=Subscription,clientId=Scraper_selvmnj28.domain.company.com,consumerId=ID_selvmnj28.domain.company.com-45117-1431866382308-0_416_1_1,destinationName=SCRAPER_VIDEO_INPUT,destinationType=Queue,persistentMode=Non-Durable
org.apache.activemq:BrokerName=localhost,Type=Subscription,clientId=Scraper_selvmnj29.domain.company.com,consumerId=ID_selvmnj29.domain.company.com-52961-1431866382264-0_416_-1_1,destinationName=topic_//ActiveMQ.Advisory.TempQueue_topic_//ActiveMQ.Advisory.TempTopic,destinationType=Topic,persistentMode=Non-Durable
org.apache.activemq:BrokerName=localhost,Type=Subscription,clientId=Scraper_selvmnj29.domain.company.com,consumerId=ID_selvmnj29.domain.company.com-52961-1431866382264-0_416_1_1,destinationName=SCRAPER_VIDEO_INPUT,destinationType=Queue,persistentMode=Non-Durable
org.apache.activemq:BrokerName=localhost,Type=Subscription,clientId=Scraper_selvmnj30.domain.company.com,consumerId=ID_selvmnj30.domain.company.com-33036-1431866396456-0_416_-1_1,destinationName=topic_//ActiveMQ.Advisory.TempQueue_topic_//ActiveMQ.Advisory.TempTopic,destinationType=Topic,persistentMode=Non-Durable
org.apache.activemq:BrokerName=localhost,Type=Subscription,clientId=Scraper_selvmnj30.domain.company.com,consumerId=ID_selvmnj30.domain.company.com-33036-1431866396456-0_416_1_1,destinationName=SCRAPER_VIDEO_INPUT,destinationType=Queue,persistentMode=Non-Durable
itaig#iganot-lt:~$
So my question is: What am I doing wrong and why does the command work when running manually from terminal but not from the script?
Thanks in advance
Ok I found the problem.
Certain lines included variables which have not been declared in time.
After re-organizing the order of variable declaration the problem has been solved.
I need to pass /DEF:c:\filepath\myLib.def" command line option from a bash script to MS compiler/linker. The path is generated as part of build process by a bash script. Basically, the argument that my script passes is:
-DEF:/c/filepath/myLib.def
MSYS path conversion can't handle it properly because it doesn't understand /DEF: part. It works if I do
-DEF=/c/filepath/myLib.def
but then ms tools don't understand this parameter. In short, what's the proper way to write that parameter in MSYS bash so that it converts it to proper argument?
On cygwin I could use cygpath, but there is no equivalent, because somebody from msys thinks that it's not needed (even if there are scripts for cygwin that uses cygpath).
Update (Aug-2016):
This question is no longer relevant, as msys2 now comes with cygpath in its installation.
...
I'll summarize my research here.
The cygpath equivalent in MSYS is to use this command:
{ cd /c/some/path && pwd -W; } | sed 's|/|\\|g'
The problem with this approach is that it requires existing path, e.g. the c:\some\path has to be an existing directory; however, real cygpath supports paths that do not exist.
So, if you need to get path to a directory that doesn't exist, then you can fallback to sed conversion of the path:
{ cd 2>/dev/null /c/some/path && pwd -W ||
echo /c/some/path | sed 's|^/\([a-z,A-Z]\)/|\1:/|'; } | sed 's|/|\\|g'
The mouthful of slashes is there to satisfy quoting rules of sed. So, if c:\some\path doesn't exist on your PC, it will try to convert forward to back slashes and replace /c/ with c:\ (or any other drive letter). The only drawback for this is that it won't work correctly non-existing paths that contain a mounted component, such as /bin/does-not-exist or /usr/bin/does-not-exist.
One more approach is to use cygpath from cygwin in MSYS. It seems that cygwin sets global environment variable CYGPATH, that is, you can use it from regular cmd.exe:
%CYGPATH% -w /c/some/path
C:\some\path
or from MSYS:
$CYGPATH -w /c/some/path
C:\some\path
as long as you set to point /c to /cygdrive/c in cygwin.
But this approach will print you /usr located in cygwin installation, not in MSYS.
In short, I think msys should really include real cygpath in the default set of tools just for some cases that aren't handled automatically by msys command line argument conversion logic
use pwd -W
or
download cygpath for msys from here http://mingw.5.n7.nabble.com/enhanced-version-of-cygpath-td28556.html
and use cygpath -wa
Similar to dmitri-rubinstein# above, I've cleaned up the code a bit and added the reverse conversion as well.
winpath() {
if [ ${#} -eq 0 ]; then
: skip
elif [ -f "$1" ]; then
local dirname=$(dirname "$1")
local basename=$(basename "$1")
echo "$(cd "$dirname" && pwd -W)/$basename" \
| sed \
-e 's|/|\\|g';
elif [ -d "$1" ]; then
echo "$(cd "$1" && pwd -W)" \
| sed \
-e 's|/|\\|g';
else
echo "$1" \
| sed \
-e 's|^/\(.\)/|\1:\\|g' \
-e 's|/|\\|g'
fi
}
unixpath() {
echo "$1" \
| sed -r \
-e 's/\\/\//g' \
-e 's/^([^:]+):/\/\1/'
}
I am using this with msysgit:
winpath() {
if [ -z "$1" ]; then
echo "$#"
else
if [ -f "$1" ]; then
local dir=$(dirname "$1")
local fn=$(basename "$1")
echo "$(cd "$dir"; echo "$(pwd -W)/$fn")" | sed 's|/|\\|g';
else
if [ -d "$1" ]; then
echo "$(cd "$1"; pwd -W)" | sed 's|/|\\|g';
else
echo "$1" | sed 's|^/\(.\)/|\1:\\|g; s|/|\\|g';
fi
fi
fi
}
My bash foo is weak and I couldn't get regexes working in bash 3.1 so I hacked out a perl script for it:
#!/bin/env perl
use strict;
my #r;
foreach my $e (#ARGV) {
$e=~s/\//\\/g;
$e=~s/^\\([A-Za-z])\\/\1:\\/;
push #r, $e;
}
print join(" ", #r);
MSYS cygpath
Program
This program convert a DOS path to a UNIX path and vice versa
#!/bin/env perl
# DOS to UNIX path conversion
# © John S. Peterson. License GNU GPL 3.
use strict;
use Getopt::Std;
# usage
if ($#ARGV == -1) {
print 'Usage: cygpath (-w) NAME...
Convert Unix and Windows format paths
Output type options:
-w, --windows print Windows form of NAMEs (C:\WINNT)
';
exit 0;
}
# option
my %opt;
getopts('w', \%opt);
# convert path
my #r;
foreach my $e (#ARGV) {
if ($opt{w}) {
# add drive letter suffix
$e =~ s,^\/([A-Za-z])\/,\1:\/,;
$e =~ s,\/,\\,g;
} else {
$e =~ s,\\,\/,g;
# add leading slash
$e = "/$e";
# remove drive letter suffix
$e =~ s,:,,;
}
push #r, $e;
}
print join("\n", #r);
Compared to Cygwin cygpath
The output from this program is better than the output from Cygwin cygpath in MSYS because
Cygwin cygpath remove the Cygwin home from a converted path, f.e.
cygpath "$CYGWIN/usr/local/bin"
/usr/local/bin
which is a problem because
it's sometimes useful to convert a DOS Cygwin path to a UNIX path for the purpose of copying files from Cygwin to MSYS
This program doesn't remove the Cygwin home
cygpath "$CYGWIN/usr/local/bin"
/c/file/program/cygwin/usr/local/bin
Compared to automatic MSYS path conversion
Manual path conversion has a use in MSYS because
the automatic path conversion is inadequate
for f.e.
devkitPro make
How about this one ?
cmd //c echo <your path>
It may not work always but it is the shortest I found
This works for me
df "$1" | tac >k
read b <k
rm k
set "$1" $b
echo ${1/$7/$2/}
ref
nearly pure GNU bash solution (which is what you commonly run in MSYS) (interestingly not working with MSYS2, leave a comment if you know why):
#!/bin/bash
# check if we have cygpath (cygwin, newer MSYS2), then just use that
which cygpath 1>/dev/null 2>&1
[[ $? = 0 ]] && (cygpath -wa "$1"; exit $?)
# check if it looks like a Windows path, in which case we directly convert and exit
[[ ${1} =~ ^[a-zA-Z]: ]] && \
echo "${1}" | sed -e 's|/|\\|g' -e 's/\(.\)/\u\1/' && exit 0
# split first path entry (if any) with trailing slash and filename
[[ ${1} =~ ^\([/a-zA-Z0-9_.-]\\w*/\)?\(.*\)$ ]]
chk_root="${BASH_REMATCH[1]}"
chk_rest="${BASH_REMATCH[2]}"
# check if the root path exists and more important: let pwd binary resolve the translation according to the mount
chk_winroot="$(cd "${chk_root}." 2>/dev/null && pwd -W)"
[[ "${chk_winroot}" == "" ]] && echo "${chk_root}: No such file or directory" && exit 1
# using substition to replace all / by \ and uppercasing the first character
# pure bash solution; sadly: the first part needs a newer bash than old MSYS have ...
# chk_drv="${chk_winroot:0:1}"
# chk_all="${chk_winroot:1}/${chk_rest}"
# echo "${chk_drv^^}${chk_all//\//\\}"
# ... so fallback to GNU sed
echo "${chk_winroot}/${chk_rest}" | sed -e 's|/|\\|g' -e 's/\(.\)/\u\1/'
There's still an issue with it: if MinGW's fstab contains an entry like /mnt/c the pwd -W of /mnt/. done in this script won't work.
To fix it: replace pwd -W by inspecting $ cat /etc/fstab | cut -d'#' -f1 | grep -v "^\s*$" entries manually and replace the first match - while this will never work for cygwin or msys2 which use a different format this is covered by using cygpath there.