0 0 * * * /bin/bash -c 'for file in $(/bin/find /some/path -name "*.log"); do /usr/bin/tee -a $file; done'
crontab run for loops
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Tag Archives: bash
can’t open file for writin sudo vim
:w !sudo tee % > /dev/null
grep IP subnet
starting with 192.x.x.x
cat ip_list.txt | grep -E "(192)(\.[0-9]{1,3}){3}"
starting with 192.168.x.x
cat ip_list.txt | grep -E "(192.168)(\.[0-9]{1,3}){2}"
starting with 192.168.10.x
cat ip_list.txt | grep -E "(192.168.10.)[0-9]{1,3}"
sort ip addresses bash
cat /tmp/ips.txt | sort -t . -k 1,1n -k 2,2n -k 3,3n -k 4,4n
10.0.0.2
10.0.0.5
10.0.0.20
192.168.0.2
192.168.0.4
192.168.0.12
encrypt bash
hide bash code using c:
apt install shc
shc -f mybash.sh
save remote files to array
n=0; for i in `cat ttt` ; do readarray arr$n < <(ssh $i 'cat /etc/passwd'); n=$(( $n + 1 )) ; done
printf '%s\n' "${#arr0[@]}"
20
printf '%s\n' "${#arr1[@]}"
26
bash printf align output
for l in 1 10 100 1000 10000 100000 1000000; do printf "%7s %s\n" $l "test string"; done
1 test string
10 test string
100 test string
1000 test string
10000 test string
100000 test string
1000000 test string
linux add hostname to stdout
base64 /dev/urandom | head -c 1000 | sed "1 i\\`hostname`" | head -n 5
localhost.localdomain
brXE3yBW/afyXoZXigNc+bTaw71rW7Ykz9xFD01ZeXeglA/vubg9eJPmldDN3qQEOZongJbjSIEl
D6tu8lfhoYboc8eJTPPPasoQP1RcbdX/kVRbrxV2cLTaKVik2o3sywpjLZl+0Dow/9Of8iToahOw
JdWXPrkmsZZ9le4uN+qGU55Z2TO2Mc/baY0UUmBXaWX9NsNTsO4HwfqnT62Gs0BVtbMaWw0vWf3n
4QxJGcNl/gi5WUM/aamcUFe5exb8YlEk6Nj3szqf3b4DQE4XODe46W/4qCzg/UFzCb5SOC0YBnEa
run cron random time
0 0 * * * sleep `shuf -i 1-86400 -n 1`; mktemp
Run:
echo '0 0 * * * sleep `shuf -i 1-86400 -n 1`; mktemp' | sudo tee -a /var/spool/cron/$USER
bash process substitution
expr $RANDOM % 14400 | tee >(xargs sleep)
vit 14357 0.0 0.0 215528 708 pts/8 S 14:21 0:00 xargs sleep
vit 14358 0.0 0.0 215220 704 pts/8 S 14:21 0:00 sleep 157
bash print before pipe
expr $RANDOM % 14400 | tee /dev/tty | xargs sleep
monitor process io
ps -eo state,pid,cmd | awk '/^D/ { print "proccess: " $3 ; system("cat /proc/"$2"/io") }'
proccess: [md1_raid10]
rchar: 0
wchar: 0
syscr: 0
syscw: 0
read_bytes: 0
write_bytes: 0
cancelled_write_bytes: 0
proccess :/opt/cpanel/ea-php56/root/usr/bin/php-cgi
rchar: 334932
wchar: 3941
syscr: 177
syscw: 26
read_bytes: 4096
write_bytes: 8192
cancelled_write_bytes: 4096
check ip by country linux
yum install geoip
geoipupdate
geoiplookup 1.1.1.1
GeoIP Country Edition: AU, Australia
ipaddr: 1.1.1.1
range_by_ip: 1.1.1.0 – 1.1.1.255
network: 1.1.1.0 – 1.1.1.255 ::24
ipnum: 16843009
range_by_num: 16843008 – 16843263
network num: 16843008 – 16843263 ::24
history date bash
echo 'export HISTTIMEFORMAT="%d/%m/%y %T "' >> ~/.bash_profile
bash move process to screen
If you forgot run process on screen, you can move procesas on it:
yum install reptyr
screen
reptyr $(pgrep name_of_proccess)