Commands by bugmenot

Commands by bugmenot (66)

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How to run a shell script on a remote host using ftp

You can upload via ftp the script.sh in unix text format, and then upload a file called run.txt to execute once the script. Such script can be multiline. If the script fails a failed.txt will be generated that you can see via ftp.
This is sample output - yours may be different.
0

watch -n10 "if test -e run.txt ; then chmod +x script.sh && ./script.sh && rm run.txt || rm run.txt && echo > failed.txt ; fi"

bugmenot · 2012-07-29 00:38:08 1
Create a tar archive with all files of a certain type found in present dir and subdirs

Note: the tar archive must not exist in order to create it. If exists it will only be updated and no already existent files in present search will still remain in the tar archive. The update option has to be used instead of create because the command tar may be executed more than once depending on the number of arguments that find throws. You can see maximum number of arguments with 'getconf ARG_MAX'
This is sample output - yours may be different.
4

find ./ -type f -name "*.txt" -exec tar uvf myarchives.tar {} +

bugmenot · 2012-07-29 00:35:58 2
Emulating netcat -e (netcat-traditional or netcat-openbsd) with the gnu-netcat

Then just nc servername 2600 and ./script.sh kill the client with ctrl+c. You can reconnect several times. kill the server with exit
This is sample output - yours may be different.
8

mkfifo foo ; nc -lk 2600 0<foo | /bin/bash 1>foo

bugmenot · 2012-07-29 00:33:41 0
Remove from PATH paths containing a string

If there are spaces won't work.
This is sample output - yours may be different.
0

export PATH= $(echo $PATH | tr ':' '\n' | awk '!/matching string/' | paste -sd:)

bugmenot · 2012-07-29 00:30:54 0
grep lines containing two consecutive hyphens
This is sample output - yours may be different.
0

grep "\-\-" file

bugmenot · 2012-07-29 00:26:14 0
Replace duplicate files by hardlinks
This is sample output - yours may be different.
1

fdupes -r -1 Neu | while read line; do j="0"; buf=""; for file in ${line[*]}; do if [ "$j" == "0" ]; then j="1"; buf=$file; else ln -f $buf $file; fi; done; done

bugmenot · 2012-01-20 22:26:54 0
Kick user
This is sample output - yours may be different.
2

killall -u username

bugmenot · 2011-11-24 20:26:38 0
Create strong, but easy to remember password

Why remember? Generate! Up to 48 chars, works on any unix-like system (NB: BSD use md5 instead of md5sum) Show Sample Output
This is sample output - yours may be different.
```
YzFj3mM1YzAjNJQ2
```
24

read -s pass; echo $pass | md5sum | base64 | cut -c -16

bugmenot · 2011-11-24 20:23:47 9
capture selected window

I think, this is a shorter one :)
This is sample output - yours may be different.
1

scrot -s /tmp/file.png

bugmenot · 2011-11-24 20:00:13 0

Display command options without typing --help

Type out the command and simply press to see the list of options for that command without having to type --help. Show Sample Output

-7

<Ctrl+o>

bugmenot · 2011-08-19 00:09:53 9

Generate an XKCD #936 style 4 word password

The first grep rejects capitalised words since the dict has proper nouns in it that you mightn't want to use. The second grep rejects words with ending in apostrophe s, and the third forces the words to be at least 15 characters long. Show Sample Output
This is sample output - yours may be different.
```
counterproductive unreasonableness multimillionaires extemporaneously
```
-2

cat /usr/share/dict/words | grep -P ^[a-z].* | grep -v "'s$" | grep -Pv ^.\{1,15\}$ | shuf -n4 | tr '\n' ' ' | sed 's/$/\n/'

bugmenot · 2011-08-15 01:03:48 3
Countdown Clock
This is sample output - yours may be different.
0

MIN=10 && for i in $(seq $(($MIN*60)) -1 1); do printf "\r%02d:%02d:%02d" $((i/3600)) $(( (i/60)%60)) $((i%60)); sleep 1; done

bugmenot · 2011-02-20 10:24:22 0
Backup to tape, rewind and check md5

Backups $DIR_TO_BACKUP into tape, creating on the fly a MD5SUM file of the backup. Then rewinds one record on tape and checks if it's well written.
This is sample output - yours may be different.
0

tar -cvf - $DIR_TO_BACKUP | tee >(md5sum > backup_md5.txt) > /dev/st0 && mt -f /dev/nst0 bsfm 1 && md5sum -c backup_md5.txt < /dev/st0

bugmenot · 2011-01-27 20:57:36 1
snapshot partition for consistent backups with minimal downtime

(FreeBSD) Once you've made the snapshot you can resume any stopped services and then back up the file system (using the snapshot) without having to worry about changed files. When finished, the snapshot can be removed : umount /mnt mdconfig -d -u 1 rm /var/.snap/snap_var_`date "+%Y-%m-%d"`
This is sample output - yours may be different.
0

mksnap_ffs /var /var/.snap/snap_var_`date "+%Y-%m-%d"` ; mdconfig -a -t vnode -f /var/.snap/snap_var_`date "+%Y-%m-%d"` -u 1; mount -r /dev/md1 /mnt

bugmenot · 2010-09-18 11:37:03 0
find available cpu frequencies on FreeBSD

Once you know the available frequencies for your CPU, they can be used to do things like set minimum CPU frequency for powerd so that it doesn't ramp down too slow on a server : /etc/sysctl.conf or /boot/loader.conf: debug.cpufreq.lowest=DESIRED FREQ HERE or at terminal sysctl debug.cpufreq.lowest=DESIRED FREQ HERE Show Sample Output
This is sample output - yours may be different.
```
dev.cpu.0.freq_levels: 1200/13000 1050/11375 900/9750 750/8125 600/6500
```
2

sysctl dev.cpu.0.freq_levels

bugmenot · 2010-09-18 11:19:46 0
Purge configuration files of removed packages on debian based systems

also search with aptitude search '~c'
This is sample output - yours may be different.
18

aptitude purge '~c'

bugmenot · 2010-09-13 12:15:00 1
< 1 2 3

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Installing debian on fedora (chrooted)

Find the package that installed a command

Use a decoy while scanning ports to avoid getting caught by the sys admin :9

Scan for open ports on the target device/computer (192.168.0.10) while setting up a decoy address (192.168.0.2). This will show the decoy ip address instead of your ip in targets security logs. Decoy address needs to be alive. Check the targets security log at /var/log/secure to make sure it worked.

Show what PID is listening on port 80 on Linux

Monitor RX/TX packets and any subsquent errors

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Delete all files found in directory A from directory B

This command is useful if you accidentally untar or unzip an archive in a directory and you want to automatically remove the files. Just untar the files again in a subdirectory and then run the above command e.g. $ for file in ~/Desktop/temp/*; do rm ~/Desktop/`basename $file`; done

Using column to format a directory listing

Remotely sniff traffic and pass to snort

I have a small embedded linux device that I wanted to use for sniffing my external network, but I didn't want to recompile/cross-compile snort for the embedded platform. So I used tcpdump over ssh to pass all the traffic as pcap data to a "normal" Linux system that then takes the pcap data and passes it to snort for processing.

Obtain last stock quote from google API with xmlstarlet

Check if your desired password is already available in haveibeenpwnd database. This command uses the API provided by HIBP

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