Commands by vutcovici

Commands by vutcovici (7)

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deleter

Show Sample Output
This is sample output - yours may be different.
```
Delete all non empty files older than 1 day.
```
0

find -type f -size +0 -mtime +1 -print0|xargs -0r rm -f

vutcovici · 2010-07-30 18:26:35 16
tail all logs opened by all java processes

Tail all logs that are opened by all java processes. This is helpful when you are on a new environment and you do not know where the logs are located. Instead of java you can put any process name. This command does work only for Linux. The list of all log files opened by java process: sudo ls -l $(eval echo "/proc/{$(echo $(pgrep java)|sed 's/ /,/')}/fd/")|grep log|sed 's/[^/]* //g'
This is sample output - yours may be different.
-1

sudo ls -l $(eval echo "/proc/{$(echo $(pgrep java)|sed 's/ /,/')}/fd/")|grep log|sed 's/[^/]* //g'|xargs -r tail -f

vutcovici · 2010-07-30 18:20:00 4
Defragment SQLite databases used by Firefox/Win32 and other software.

This command defragment the SQLite databases found in the home folder of the current Windows user. This is usefull to speed up Firefox startup. The executable sqlite3.exe must be located in PATH or in the current folder. In a script use: for /f "delims==" %%a in (' dir "%USERPROFILE%\*.sqlite" /s/b ') do echo vacuum;|"sqlite3.exe" "%%a" Show Sample Output
This is sample output - yours may be different.
```
C:\>for /F "delims==" %a in (' dir "%USERPROFILE%\*.sqlite" /s/b ') do echo vacuum;  | "sqlite3.exe"  "%a"

C:\>echo vacuum;  | "sqlite3.exe"  "C:\Documents and Settings\vutcovici\Application Data\Mozilla\Firefox\Profiles\3apduvcu.default\content-prefs.sqlite"
```
-3

for /f "delims==" %a in (' dir "%USERPROFILE%\*.sqlite" /s/b ') do echo vacuum;|"sqlite3.exe" "%a"

vutcovici · 2010-01-18 20:56:00 7
Send SNMP traps
This is sample output - yours may be different.
0

sudo snmptrap -m ALL -v 2c -c public trapserver "" UCD-DEMO-MIB::ucdDemoPublic SNMPv2-MIB::sysLocation.0 s "Just here"

vutcovici · 2009-08-06 17:32:16 21
Create a backup of the file.

It will create a backup of the filename. The advantage is that if you list the folder the backups will be sorted by date. The command works on any unix in bash. Show Sample Output
This is sample output - yours may be different.
```
$ cp test.txt{,-$(date +%Y-%m-%d)}
$ ls -l test.txt*
-rw-rw-r--  1 user group 0 Aug  6 13:40 test.txt
-rw-rw-r--  1 user group 0 Aug  6 13:41 test.txt-2009-08-06
```
1

cp path/filename{,-$(date +%Y-%m-%d)}

vutcovici · 2009-08-06 13:50:00 5

dstat - a mix of vmstat, iostat, netstat, ps, sar...

This is a very powerful command line tool to gather statistics for a Linux system. http://dag.wieers.com/home-made/dstat/ Show Sample Output

dstat -ta

vutcovici · 2009-04-02 14:19:12 9

Propagate X session cookies on a different user and login as that user

Reads a username from Show Sample Output

read -p 'Username: ' u;sudo -H -u $u xauth add $(xauth list|grep :$(echo ${DISPLAY: -4:2}));sudo su - $u

vutcovici · 2009-04-02 13:24:53 8

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Recursively remove all files in a CVS directory

This will search all directories and ignore the CVS ones. Then it will search all files in the resulting directories and act on them.

Show memory stats on Nexenta/Solaris

Press a key automatically

Press a key automatically via xvkbd.

list block devices

Shows all block devices in a tree with descruptions of what they are.

Normalize volume in your mp3 library

This normalizes volume in your mp3 library, but uses mp3gain's "album" mode. This applies a gain change to all files from each directory (which are presumed to be from the same album) - so their volume relative to one another is changed, while the average album volume is normalized. This is done because if one track from an album is quieter or louder than the others, it was probably meant to be that way.

Which processes are listening on a specific port (e.g. port 80)

swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

pretend to be busy in office to enjoy a cup of coffee

using seq inside a subshell instead of a bash sequence to create increments.

Create md5sum of files under the current dir excluding some directories

Useful if you want get all the md5sum of files but you want exclude some directories. If your list of files is short you can make in one command as follow: $ find . -type d $ -name DIR1 -o -name DIR2 $ -prune -o -type f -exec md5sum {} \; Alternatively you can specify a different command to be executed on the resulting files.

Use color grep by default

Alias the grep command to show colored results by default.

Use jq to validate and pretty-print json output

The `jq` tool can also be used do validate json files and pretty print output: ` jq < file.json` Available on several platforms, including newer debian-based systems via `#sudo apt install jq`, mac via `brew install jq`, and from source https://stedolan.github.io/jq/download/ This alternative to the original avoids the useless use of cat

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