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InnoDB related parameters
This is sample output - yours may be different.
0

mysqladmin variables | egrep '(innodb_log_file|innodb_data_file)'

shantanuo · 2020-02-19 10:24:52 4
mysql backup utility
This is sample output - yours may be different.
0

mysqlbackup --port=3306 --protocol=tcp --user=dba --password=dba --with-timestamp --backup-dir=/tmp/toback/ --slave-info backup-and-apply-log --innodb_data_file_path=ibdata1:10M:autoextend --innodb_log_files_in_group=2 --innodb_log_file_size=5242880

shantanuo · 2020-02-19 10:24:15 2
port forwarding

pem file used by AWS servers for additional security
This is sample output - yours may be different.
1

ssh -L8888:localhost:80 -i nov15a.pem [email protected]

shantanuo · 2020-02-19 10:20:18 4
check mysql capacity to handle traffic
This is sample output - yours may be different.
-1

mysqlslap --query=/root/select_query_cp.sql --concurrency=10 --iterations=5 --create-schema=cvts1

shantanuo · 2020-02-15 10:40:39 2
show the difference
This is sample output - yours may be different.
2

diff file1 file2 --side-by-side --suppress-common-lines

shantanuo · 2020-02-15 10:38:44 26
Change values from 0 to 100
This is sample output - yours may be different.
0

awk '{if ($3 =="LAN" && $5 == "0.00" ) print $1, $2, "LAN", "288", "100.00"; else print $1 ,$2, $3, $4, $5 }' sla-avail-2013-Feb > sla-avail-2013-Feb_final

shantanuo · 2020-02-15 10:37:44 3
Extract queries from mysql general log

queries related to table 'Invoice_template' Show Sample Output
This is sample output - yours may be different.
0

grep -Eo '( *[^ ]* *){4}Invoice_Template( *[^ ]* *){4}' /mysql-bin-log/mysql-gen.log | head -10000 | sort -u

shantanuo · 2020-02-14 08:18:58 1
Slow Down Command Output

( Or ls -lat|lolcat -a if you like it in technicolor - apt install lolcat if needed )
This is sample output - yours may be different.
2

ls -alt|awk '{if (system("sleep .5 && exit 2") != 2) exit; print}'

knoppix5 · 2020-02-13 02:59:48 2
rsync should continue even if connection lost

Manage partial uploads using append option.
This is sample output - yours may be different.
1

rsync --archive --recursive --compress --partial --progress --append [email protected]:/backup/somefile.txt.bz2 /home/ubuntu/

shantanuo · 2020-02-11 13:48:22 0
rsync using pem file

Especially useful while syncing to Amazon EC2 instance. avz stands for archive verbose compress
This is sample output - yours may be different.
0

rsync -e 'ssh -i /root/my.pem' -avz /mysql/db/data_summary.* ec2-1-2-4-9.compute-1.amazonaws.com:/mysql/test/

shantanuo · 2020-02-11 13:45:32 2
stream a youtube video with mpv where $1 is the youtube link.

opens a new session with video stream
This is sample output - yours may be different.
2

setsid mpv --input-ipc-server=/tmp/mpvsoc$(date +%s) -quiet "$1" >/dev/null 2>&1

n0a110w · 2020-02-10 12:35:11 1
check mysql server performance
This is sample output - yours may be different.
0

mysqlslap --query=/home/ec2-user/insert.txt --concurrency=123 --iterations=1 --create-schema=test

shantanuo · 2020-02-09 09:52:28 18
backup all data in compressed format

error out to a different file every day if it is part of a cron entry. The backup file will overwrite older version.
This is sample output - yours may be different.
0

mysqldump --routines --all-databases | gzip > /home/mydata.sql.gz 2> /home/mydata.date '+\%b\%d'.err

shantanuo · 2020-02-09 07:46:42 1
Check if the same table name exist across different databases

Useful command for MySQL Show Sample Output
This is sample output - yours may be different.
```
Count of databases for e.g. 3
```
0

find . -name "withdrownblocks.frm" | sort -u | awk -F'/' '{print $3}' | wc -l

shantanuo · 2020-02-09 07:22:42 3
Find a file and then copy to tmp folder

Select only the files with given name and copy them to /tmp/ folder.
This is sample output - yours may be different.
-1

for file in `ls | grep -i 'mumbai|pune|delhi'` ; do cp $file /tmp/ ; done

shantanuo · 2020-02-09 06:56:45 6
Find non-standard files in mysql data directory

These files should be removed to keep the size of data directory under control. If you exclude the known important file types like frm and MYD then what-ever is left can be either moved or deleted.
This is sample output - yours may be different.
0

find . -type f -not -name "*.frm" -not -name "*.MYI" -not -name "*.MYD" -not -name "*.TRG" -not -name "*.TRN" -not -name "db.opt"

shantanuo · 2020-02-09 06:45:50 1
Compare mysql db schema from two different servers
This is sample output - yours may be different.
0

diff <(mysqldump -hsystem db_name --no-data --routines) <(mysqldump -hsystem2 db_name --no-data --routines) --side-by-side --suppress-common-lines --width=690 | more

shantanuo · 2020-02-09 02:37:05 2
Dump top 10 ports tcp/udp from nmap

To be used with other port scanners and or for help with iptables --dport 1000:2000 style expansion Show Sample Output
This is sample output - yours may be different.
```
7,9,13,21-23,25-26,37,53,79-81,88,106,110-111,113,119,135,139,143-144,179,199,389,427,443-445,465,513-515,543-544,548,554,587,631,646,873,990,993,995,1025-1029,1110,1433,1720,1723,1755,1900,2000-2001,2049,2121,2717,3000,3128,3306,3389,3986,4899,5000,5009,5051,5060,5101,5190,5357,5432,5631,5666,5800,5900,6000-6001,6646,7070,8000,8008-8009,8080-8081,8443,8888,9100,9999-10000,32768,49152-49157
```
0

nmap -oA derp --top-ports 10 localhost>/dev/null;grep 'services\=' derp.xml | sed -r 's/.*services\=\"(.*)(\"\/>)/\1/g'

operat0r · 2020-02-06 12:59:24 3
list current processes writing to hard drive
This is sample output - yours may be different.
1

lsof | grep -e "[[:digit:]]\+w"

aysadk · 2020-01-27 23:10:38 4
Massive change of file extension (bash)

Using bash parameters expansion
This is sample output - yours may be different.
4

for file in *.txt; do mv "${file%.txt}{.txt,.xml}"; done

rgawenda · 2020-01-23 08:54:34 0
SFTP upload through HTTPS proxy

Overwrites remote file without asking! Uses HTTPS proxy that supports CONNECT. Actually uses SSH and not SFTP to upload the file.
This is sample output - yours may be different.
0

cat myFile.json | ssh [email protected] -o "ProxyCommand=nc.openbsd -X connect -x proxyhost:proxyport %h %p" 'cat > myFile.json'

casueps · 2020-01-22 11:00:20 5
Boooted as EFI/UEFI or BIOS
This is sample output - yours may be different.
1

[[ -d "/sys/firmware/efi" ]] && echo "UEFI" || echo "BIOS"

wuziduzi · 2020-01-17 09:39:29 1
Print hugepage consumption of each process

The sample output is from an Android Device Show Sample Output
This is sample output - yours may be different.
```
/vendor/bin/hw/qcrild-c2 smaps:AnonHugePages:      2048 kB

/vendor/bin/imsdatadaemon smaps:AnonHugePages:      4096 kB

/vendor/bin/imsdatadaemon smaps:AnonHugePages:      2048 kB
```
0

grep -e AnonHugePages /proc/*/smaps | awk '{ if($2>4) print $0} ' | awk -F "/" '{system("cat /proc/" $3 "/cmdline");printf("\n");print $0; printf("\n");}'

praton · 2020-01-14 07:50:44 0
Print your cpu intel architecture family
This is sample output - yours may be different.
3

cat /sys/devices/cpu/caps/pmu_name

wuziduzi · 2020-01-01 04:57:27 1
Delete all local git branches that have been merged and deleted from remote
This is sample output - yours may be different.
-1

git branch -d $( git branch -vv | grep '\[[^:]\+: gone\]' | awk '{print $1}' | xargs )

gtron · 2019-12-22 15:48:54 1
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Convert CSV to JSON

Replace 'csv_file.csv' with your filename.

List top 100 djs from https://djmag.com/top100djs

Testing reading speed with dd

Write comments to your history.

A null operation with the name 'comment', allowing comments to be written to HISTFILE. Prepending '#' to a command will *not* write the command to the history file, although it will be available for the current session, thus '#' is not useful for keeping track of comments past the current session.

List only locally modified files with CVS

Install a Firefox add-on/theme to all users

To install a theme use: $ sudo firefox -install-global-theme /path/to/theme You can get the .xpi or .jar file from the versions history on the add-on/theme page. NOTE: may not work in your system (Debian-based is an example).

Check Ram Speed and Type in Linux

from http://maysayadkaba.blogspot.com/2008/08/linux-check-ram-speed-and-type.html

Convert seconds to [DD:][HH:]MM:SS

Converts any number of seconds into days, hours, minutes and seconds. sec2dhms() { declare -i SS="$1" D=$(( SS / 86400 )) H=$(( SS % 86400 / 3600 )) M=$(( SS % 3600 / 60 )) S=$(( SS % 60 )) [ "$D" -gt 0 ] && echo -n "${D}:" [ "$H" -gt 0 ] && printf "%02g:" "$H" printf "%02g:%02g\n" "$M" "$S" }

Search and replace in multiple files recursively

Replace "foo" with "bar" in all files in current directory recursively

Convert seconds to [DD:][HH:]MM:SS

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All commands (14,029)

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