i am not root user,so i install aria2-1.34.0 with ./configure --prefix=/home/xxx/.local, everything works fine but on-download-complete
i set on-download-complete=/home/xxx/aria2/a.sh
#!/bin/bash
echo 123 > 1.txt
when a task download completed, the log shows everything is ok
2019-10-28 19:04:11.295587 [NOTICE] [RequestGroup.cc:1216] Download complete: /home/xxx/aria2/data/0.png
2019-10-28 19:04:11.295598 [INFO] [DefaultBtProgressInfoFile.cc:415] The segment file /home/xxx/aria2/data/0.png.aria2 does not exist.
2019-10-28 19:04:11.295612 [INFO] [util.cc:2239] Executing user command: /home/xxx/aria2/a.sh b031d9399fb9d93f 1 /home/xxx/aria2/data/0.png
but actually nothing happened, it didn't work!!!
aria2c path:
/home/xxx/.local/aria2c
aria2.conf
enable-rpc=true
rpc-allow-origin-all=true
rpc-listen-all=false
max-concurrent-downloads=1
continue=true
max-connection-per-server=5
min-split-size=5M
split=5
max-overall-download-limit=5M
max-download-limit=2M
max-overall-upload-limit=0
max-upload-limit=0
dir=/home/xxx/aria2/data
file-allocation=prealloc
on-download-complete=/home/xxx/aria2/a.sh
log=/home/xxx/aria2/aria2.log
log-level=info
i don't know how to deal with it, could u give me any suggestions, thanks.
got a solution for me
put --on-download-complete in cmd instead of aria2.conf
just run aria2 like:
aria2c --conf-path=/xxx/xxx/arai2.conf --on-download-complete=/xxx/xxx/xxx.sh -D
and it works
but i have no idea why it didn't work if set --on-download-complete in conf file
Accroding to the official document
-D, --daemon [true|false]
Run as daemon. The current working directory will be changed to / and standard input, standard output and standard error will be redirected to /dev/null. Default: false
You should modify /home/xxx/aria2/a.sh to
#!/bin/bash
echo 123 > $(dirname $0)/1.txt
to write the output to the right place.
I am trying to create an autocomplete script for scp.
The script reads the user and hostname from my .ssh/config file
My .ssh/config file looks like:
Host host1
HostName host1
User userA
port 22
Host host2
HostName host2
User userB
port 22
Host host3
HostName host3
User userB
port 22
My .autocomplete_scp.sh file is:
# SSH
function _scp_completion() {
pcregrep -o -M 'HostName [a-zA-Z.]+[\n\t\s]+User [a-zA-Z]+'
$HOME/.ssh/config | awk 'NR % 2 == 1 { o=$2 ; next } { print $2"#"o}'
}
complete -W "$(_scp_completion)" scp
I source this file in my bashrc.
Now when I type userA and press Tab, the autocomplete function will give me userA#host1. When I type userB and hit Tab, the autocomplete function will give me userB#, but I am not able to get the full string (userB#host2 or userB#host3).
It also doesn't work when I type userA#h and hit the Tab button twice. So it seems to get stuck due to the # sign.
(When I remove the # sign from the _scp_completion function it works fine.)
Any ideas to fix this? Thanks!
The easy way to make it work is to remove '#' from $COMP_WORDBREAKS or Bash would handle # by itself. You can try like this:
COMP_WORDBREAKS=${COMP_WORDBREAKS//#}
complete -W 'userA#host1 userB#host2 userB#host3' scp
According to bash doc:
COMP_WORDBREAKS
The set of characters that the readline library treats as word separators when performing word completion.
Everytime I run a sudo command, I get the following error message:
/etc/sudoers: syntax error near line 1 <<<
sudo: parse error in /etc/sudoers near line 1
sudo: no valid sudoers sources found, quitting
sudo: unable to initialize policy plugin
My sudoers file within /etc/ is empty. How do I resolve this issue? I'm on Mac OS High Sierra
You could try this link to grab some sudoer file examples. Re-create your sudoers file using the visudo command
http://www.softpanorama.org/Access_control/Sudo/sudoer_file_examples.shtml
In case the link breaks, here is a "default" sudoer file that is described on that page:
# Sample /etc/sudoers file.
#
# This file MUST be edited with the 'visudo' command as root.
#
# See the sudoers man page for the details on how to write a sudoers file.
#
##
# User alias specification
##
User_Alias FULLTIMERS = millert, mikef, dowdy
User_Alias PARTTIMERS = bostley, jwfox, crawl
User_Alias WEBMASTERS = will, wendy, wim
##
# Runas alias specification
##
Runas_Alias OP = root, operator
Runas_Alias DB = oracle, sybase
##
# Host alias specification
##
Host_Alias SPARC = bigtime, eclipse, moet, anchor:\
SGI = grolsch, dandelion, black:\
ALPHA = widget, thalamus, foobar:\
HPPA = boa, nag, python
Host_Alias CUNETS = 128.138.0.0/255.255.0.0
Host_Alias CSNETS = 128.138.243.0, 128.138.204.0/24, 128.138.242.0
Host_Alias SERVERS = master, mail, www, ns
Host_Alias CDROM = orion, perseus, hercules
##
# Cmnd alias specification
##
Cmnd_Alias DUMPS = /usr/sbin/dump, /usr/sbin/rdump, /usr/sbin/restore, \
/usr/sbin/rrestore, /usr/bin/mt
Cmnd_Alias KILL = /usr/bin/kill
Cmnd_Alias PRINTING = /usr/sbin/lpc, /usr/bin/lprm
Cmnd_Alias SHUTDOWN = /usr/sbin/shutdown
Cmnd_Alias HALT = /usr/sbin/halt
Cmnd_Alias REBOOT = /usr/sbin/reboot
Cmnd_Alias SHELLS = /sbin/sh, /usr/bin/sh, /usr/bin/csh, /usr/bin/ksh, \
/usr/local/bin/tcsh, /usr/bin/rsh, \
/usr/local/bin/zsh
Cmnd_Alias SU = /usr/bin/su
Cmnd_Alias VIPW = /usr/sbin/vipw, /usr/bin/passwd, /usr/bin/chsh, \
/usr/bin/chfn
##
# Override built-in defaults
##
Defaults syslog=auth
Defaults>root !set_logname
Defaults:FULLTIMERS !lecture
Defaults:millert !authenticate
Defaults#SERVERS log_year, logfile=/var/log/sudo.log
##
# User specification
##
# root and users in group wheel can run anything on any machine as any user
root ALL = (ALL) ALL
%wheel ALL = (ALL) ALL
# full time sysadmins can run anything on any machine without a password
FULLTIMERS ALL = NOPASSWD: ALL
# part time sysadmins may run anything but need a password
PARTTIMERS ALL = ALL
# jack may run anything on machines in CSNETS
jack CSNETS = ALL
# lisa may run any command on any host in CUNETS (a class B network)
lisa CUNETS = ALL
# operator may run maintenance commands and anything in /usr/oper/bin/
operator ALL = DUMPS, KILL, SHUTDOWN, HALT, REBOOT, PRINTING,\
sudoedit /etc/printcap, /usr/oper/bin/
# joe may su only to operator
joe ALL = /usr/bin/su operator
# pete may change passwords for anyone but root on the hp snakes
pete HPPA = /usr/bin/passwd [A-z]*, !/usr/bin/passwd root
# bob may run anything on the sparc and sgi machines as any user
# listed in the Runas_Alias "OP" (ie: root and operator)
bob SPARC = (OP) ALL : SGI = (OP) ALL
# jim may run anything on machines in the biglab netgroup
jim +biglab = ALL
# users in the secretaries netgroup need to help manage the printers
# as well as add and remove users
+secretaries ALL = PRINTING, /usr/bin/adduser, /usr/bin/rmuser
# fred can run commands as oracle or sybase without a password
fred ALL = (DB) NOPASSWD: ALL
# on the alphas, john may su to anyone but root and flags are not allowed
john ALPHA = /usr/bin/su [!-]*, !/usr/bin/su *root*
# jen can run anything on all machines except the ones
# in the "SERVERS" Host_Alias
jen ALL, !SERVERS = ALL
# jill can run any commands in the directory /usr/bin/, except for
# those in the SU and SHELLS aliases.
jill SERVERS = /usr/bin/, !SU, !SHELLS
# steve can run any command in the directory /usr/local/op_commands/
# as user operator.
steve CSNETS = (operator) /usr/local/op_commands/
# matt needs to be able to kill things on his workstation when
# they get hung.
matt valkyrie = KILL
# users in the WEBMASTERS User_Alias (will, wendy, and wim)
# may run any command as user www (which owns the web pages)
# or simply su to www.
WEBMASTERS www = (www) ALL, (root) /usr/bin/su www
# anyone can mount/unmount a cd-rom on the machines in the CDROM alias
ALL CDROM = NOPASSWD: /sbin/umount /CDROM,\
/sbin/mount -o nosuid\,nodev /dev/cd0a /CDROM
Never open sudoer file with a normal editor. always use visudo
just type
sudo visudo
this will take you to /etc/sudoers and upon saving it will make sure that there is no error in formatting.
if you make an error in sudoer file, you will lose sudo access, so always use visudo
You can use pkexec if you are stuck.
pkexec allows you to execute program as another user. If you don't specify a user then the program will be executed as root
Root Escalation
pkexec bash
Fix your syntax error
visudo
Ubuntu 20.04 encounter this error upon "sudo anycommand"
/etc/sudoers.d/sudoers: too many levels of includes near line 29 <<<
sudo: parse error in /etc/sudoers.d/sudoers near line 29
sudo: no valid sudoers sources found, quitting
sudo: unable to initialize policy plugin
My solution:
Though not know how the sudoers file created in /etc/sudoers.d.
After reading README in /etc/sudoers.d,
Extract of README
Note that there must be at least one file in the sudoers.d directory (this one will do), and all files in this directory should be mode 0440.
Removed the sudoers in /etc/sudoers.d
pkexec rm /etc/sudoers.d/sudoers
System will prompt for user password.
Can execute sudo command as usual.
I need to write a korn script that depending on the host the script is running on, will set a deployment directory (so say 5 hosts deploy the software to directory one and five other hosts deploy to directory two).
How could I do this - I wanted to avoid an if condition for every host like below
IF [hostname = host1] then $INSTALL_DIR=Dir1
ELSE IF [hostname = host2] then $INSTALL_DIR=Dir1
and would prefer to have a list of say Directory1Hosts and Directory2Hosts which contains all the hosts valid for each directory, and then I would just check if the host the script is running on is in my Directory1Hosts or Directory2Hosts (so only two IF conditions instead of 10).
Thanks for your help - have been struggling to find how to do effectively a contains clause.
Use a case statement:
case $hostname in
host1) INSTALL_DIR=DIR1 ;;
host2) INSTALL_DIR=DIR2 ;;
esac
or use an associative array
install_dirs=([host1]=DIR1 [host2]=DIR2)
...
INSTALL_DIR=${install_dirs[$hostname]}
When you want to have configuration and code apart, you can make a config directory: one file with hosts for each install dir.
# cat installdirs/Dir1
host1
host2
With these files your code can be
INSTALL_DIR=$(grep -Flx "${hostname}" installdirs/* | cut -d"/" -f2)
After adding a hosting file using etc/hosts on Mac OS X machines manually we found out we needed to remove the current hosts and add a new one. I'm wondering if it's possible to add a hosting file for Mac OS X using Bash.
This is the current state. How do we change the final line or add one to it?
##
# Host Database
#
# localhost is used to configure the loopback interface
# when the system is booting. Do not change this entry.
##
127.0.0.1 localhost Computer_Name
255.255.255.0 broadcasthost
::1 localhost
10.24.82.5 server_name
I guess you are asking how to edit the file from the command line, then
$ sed -i.OLD 's#10\.24\.82\.5 #8.8.8.8 #' /etc/hosts
The -i option allows sed to edit in-place.
You may need sudo to have write permission to that file.
You can simply use sed to change it, you just need to provide new ip address:
sed 's/^.*\(server_name\)/new_ip_address \1/' file