Monitor cpu and memory usage of the process
Print every second cpu and memory usage of the process:
watch -n 1 "ps -eo pid,pcpu,pmem,args | kazy -i xnotitle -e kazy"
linux/
Prettify json output in curl
Install jq package:
sudo dnf install jq
Usage example:
curl -u key:x "https://api.com/users.json" | jq
How to regenerate grub configuration
sudo grub2-mkconfig -o /boot/efi/EFI/fedora/grub.cfg
Log quires in dnsmasq
Add the following line to dnsmasq configuration file:
log-queries
lxd: Increase disk size of an existing container
lxc config device override mycontainer root size=20GB
Restart the container to apply changes.
i5-6440HQ CPU benchmark
CPU benchmark from Dell Precision 15 5510 Core-i5 i5-6440HQ
$ sysbench cpu run --time=5
sysbench 1.0.9 (using system LuaJIT 2.1.0-beta3)
Running the test with following options:
Number of threads: 1
Initializing random number generator from current time
Prime numbers limit: 10000
Initializing worker threads...
Threads started!
CPU speed:
events per second: 1157.88
General statistics:
total time: 5.0008s
total number of events: 5792
Latency (ms):
min: 0.80
avg: 0.86
max: 3.74
95th percentile: 1.06
sum: 4998.26
Threads fairness:
events (avg/stddev): 5792.0000/0.00
execution time (avg/stddev): 4.9983/0.00
List all IP addresses in a network
To list ip addresses of all connected to the network devices, use this command:
nmap -sn 192.168.0.0/24
python: Django-like testrunner
Django-like testrunner for non-django projects:
#!/usr/bin/env python
import argparse
import collections
import unittest
import sys
def main():
parser = argparse.ArgumentParser(description='Django-like testrunner')
parser.add_argument('specific_test', metavar='', type=str, nargs='?', help='Specifc test')
parser.add_argument("--failfast", action="store_true")
parser.add_argument("--verbosity", type=int, default=1)
args = parser.parse_args()
loader = unittest.TestLoader()
all_tests = loader.discover('.', top_level_dir="./")
suite = unittest.TestSuite()
if args.specific_test:
def walk_tests(tests):
if isinstance(tests, collections.Iterable):
for item in tests:
walk_tests(item)
return
if tests.id().startswith(args.specific_test):
suite.addTest(tests)
elif not str(tests).startswith("test"):
sys.exit("Error in file %s" % tests)
walk_tests(all_tests)
else:
suite.addTests(all_tests)
unittest.TextTestRunner(verbosity=args.verbosity, failfast=args.failfast).run(suite)
if __name__ == "__main__":
main()
Run command as a different user
Command runuser allows to run a command as a different user. You must be root to be able to run that command:
sudo runuser -l vagrant -c "GH=1 env"