Commands by Koobiac

Commands by Koobiac (12)

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Remove job from crontab by commandline

The "-u USER" is optional if root user is used
This is sample output - yours may be different.
1

crontab -l -u USER | grep -v 'YOUR JOB COMMAND or PATTERN' | crontab -u USER -

Koobiac · 2015-03-11 13:10:47 12
Print all interfaces IP and Mac address in the same line

Thx Mass1 for the sharing
This is sample output - yours may be different.
0

ifconfig | egrep -A2 "eth|wlan" | tr -d "\n"| sed 's/\-\-/\n/g'|awk '{print "mac: "$5 " " $7}' | sed 's/addr:/addr: /g'

Koobiac · 2014-09-11 08:18:18 9
Print the IP address and the Mac address in the same line

Print the IP address and the Mac address in the same line Show Sample Output
This is sample output - yours may be different.
```
mac:00:50:12:BD:5E:5B - adr:192.168.0.1
```
1

ifconfig | head -n 2 | tr -d '\n' | sed -n 's/.*$00:[^ ]*$.*$adr:[^ ]*$.*/mac:\1 - \2/p'

Koobiac · 2014-09-03 14:35:27 18
Check fstab volumes and volumes mounted.

With this command, you can check the difference between the volumes mounted and the volume in /etc/fstab.
This is sample output - yours may be different.
0

diff <(cat /etc/fstab | grep vol | grep -v "^#" | awk '{print $1}') <(df -h | grep vol)

Koobiac · 2014-01-23 15:18:08 12
Find files and calculate size of result in shell

Find files and calculate size with stat of result in shell
This is sample output - yours may be different.
1

find . -name "pattern" -exec stat -c%s {} \; | awk '{total += $1} END {print total}'

Koobiac · 2014-01-15 11:07:09 16
Display the format of a directory or file
This is sample output - yours may be different.
0

stat -f -L -c %T YOUR_FILE_OR_DIRECTORY

Koobiac · 2013-06-14 07:27:41 8
Simulate a tree command
This is sample output - yours may be different.
0

ls -R | grep ":$" | sed -e 's/:$//' -e 's/[^-][^\/]*\//--/g' -e 's/^/ /' -e 's/-/|/'

Koobiac · 2012-05-30 14:50:13 4
Count the number of deleted files

It does not work without the verbose mode (-v is important)
This is sample output - yours may be different.
1

find /path/folder -type f -name "*.*" -print -exec rm -v {} + | wc -l;

Koobiac · 2011-09-19 14:53:37 8
Extract all 404 errors from your apache accesslog (prefix lines by occurrences number)
This is sample output - yours may be different.
2

grep "HTTP/1.1\" 404" access_log | awk '{print $7 } ' | sort | uniq -c | sort -n

Koobiac · 2011-08-25 12:01:14 4
Check syntax for all PHP files in the current directory and all subdirectories
This is sample output - yours may be different.
14

find . -name \*.php -exec php -l "{}" \;

Koobiac · 2011-08-02 12:12:32 9
netstat with group by ip adress
This is sample output - yours may be different.
4

netstat -ntu | awk ' $5 ~ /^[0-9]/ {print $5}' | cut -d: -f1 | sort | uniq -c | sort -n

Koobiac · 2011-07-01 11:17:38 8
Command to import Mysql database with a progress bar.
This is sample output - yours may be different.
0

pv -t -p /path/to/sqlfile.sql | mysql -uUSERNAME -pPASSWORD -D DATABASE_NAME

Koobiac · 2011-06-27 13:27:48 8

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shuffle lines via perl

Same, without modules... Probably smarter option: just use the shuf command or even sort -R.

Convert Squid unixtime logs in human-readable ones

On-the-fly conversion of Unix Time to human-readable in Squid's access.log

Rename files in batch

parrallel execution of a command on remote hosts by ssh or rsh or ...

parrallel execution of a command on remote host by ssh or rsh or ... very useful for cluster management (software update)

save date and time for each command in history

Date-time format: YYYY-MM-DD HH:MM:SS

Print environment information.

Print environment (system) information using Perl.

Save a file you edited in vim without the needed permissions

I often forget to sudo before editing a file I don't have write permissions on. When you come to save that file and get the infamous "E212: Can't open file for writing", just issue that vim command in order to save the file without the need to save it to a temp file and then copy it back again.

Make a zip file with date/time created in the name of the file , zip all sub-directorys

zip -r /tmp/filename-`date +%Y%m%d_%H%M%S`.zip /directory/

HTML5 ogg player

find OGG audio files on your *nix box and listen to them using your web browser

Change host name

With sed you can replace strings on the fly.

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