Lean the command.

learn_liunx02.sh

# basic command
uname -a
cat /etc/proc/version

# zip / unzip
tar -czvf shared.tar.gz shared
tar -tzvf shared.tar.gz
tar -xzvf shared.tar.gz
gzip 1.js
gzip -d *.gz
gzip -c 1.js > 1.js.gz

# low priority for CPU
nice -19 tar cfz 29-timer.log.tar.gz 29-timer.log

# disk usage
df -hl
du -sh ./*
 
# remove many files
ls | xargs rm -f
 
# find last 300 minutes and remove
find . -type f -mmin -300 | xargs rm -f
 
# show log and cut to 1 line
tail -f /opt/logs/*/23-20130822 | grep "Aug" | awk -F '\x01' '{print(substr($1,34,155))}'
 
# show execute time
time ./***.sh
 
# do not seperate line
echo $(date; cat ***| wc-l)
 
# run every 5 seconds
while sleep 5; do date; done

basic_cmd.sh

# basic command
uname -a
cat /etc/proc/version

# zip / unzip
tar -czvf shared.tar.gz shared
tar -tzvf shared.tar.gz
tar -xzvf shared.tar.gz
gzip 1.js
gzip -d *.gz
gzip -c 1.js > 1.js.gz

# low priority for CPU
nice -19 tar cfz 29-timer.log.tar.gz 29-timer.log

# create local tar ball from remote host folders
$ ssh user@remotehost "cd /var/www/html; tar cvfz - datafolder" > datafolder.tar.gz

disk_stat.sh

# disk usage
df -hl
du -sh ./*

# remove many files
ls | xargs rm -f

# find last 300 minutes and remove
find . -type f -mmin -300 | xargs rm -f

# show log and cut to 1 line
tail -f /opt/logs/ec2-us-sco2-prod-web*/23-20130822 | grep "Aug" | awk -F '\x01' '{print(substr($1,34,155))}'

# show execute time
time ./***.sh

# do not seperate line
echo $(date; cat ***| wc-l)

# run every 5 seconds
while sleep 5; do date; done

time dd bs=1M count=1024 if=/dev/zero of=test.file conv=fdatasync

learn_liunx.sh

# basic command
uname -a
cat /etc/proc/version
 
# zip / unzip
tar -czvf shared.tar.gz shared
tar -tzvf shared.tar.gz
tar -xzvf shared.tar.gz
gzip 1.js
gzip -d *.gz
gzip -c 1.js > 1.js.gz
 
# low priority for CPU
nice -19 tar cfz 29-timer.log.tar.gz 29-timer.log
 
# disk usage
df -hl
du -sh ./*

# remove many files
ls | xargs rm -f

# find last 300 minutes and remove
find . -type f -mmin -300 | xargs rm -f

# show log and cut to 1 line
tail -f /opt/logs/ec2-us-sco2-prod-web*/23-20130822 | grep "Aug" | awk -F '\x01' '{print(substr($1,34,155))}'

# show execute time
time ./***.sh

# do not seperate line
echo $(date; cat ***| wc-l)

# run every 5 seconds
while sleep 5; do date; done

redis_monitor.sh

$ cat redis_monitor_repeat.sh
while sleep 5; do ./redis_monitor.sh | tr -t '\n' ','; date +"%Y-%m-%d %H:%M:%S"; done

$ cat redis_monitor.sh
date +"%Y-%m-%d %H:%M:%S"
date_start=$(date +%s)
cat redis.cmd | redis-cli
date_end=$(date +%s)
echo $((date_end-date_start))

$ cat redis.cmd
SELECT 1
get REQUEST_COUNT
SLOWLOG LEN

xargs_test.sh

#!/bin/bash

find . -type f | grep -vE "^./.git|^./tmp" | xargs -I {} chmod 660 {}
find . -type d | grep -vE "^./.git|^./tmp|^.$" | xargs -I {} chmod 770 {}

head -n 100 tutorial_1209.csv | grep -o "^[0-9]\+" | xargs -n1 sh user_size.sh > size.csv