Commands using cat (514)
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Some servers don't have ssh-copy-id, this works in those cases. It will ask for the destination server, this can be IP, hostname, or user@hostname if different from current user. Ssh keygen will let you know if a pubkey already exists on your system and you can opt to not overwrite it.
-2echo 'Host or User@Host?:'; read newserver && ssh-keygen -N "" -t rsa -f ~/.ssh/id_rsa ; ssh $newserver cat <~/.ssh/id_rsa.pub ">>" ~/.ssh/authorized_keys ; ssh $newserver -
-2ps -a |grep cat |wc -l
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-2cat `ls -r /sys/class/net/*/address` | sort -u
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The first grep rejects capitalised words since the dict has proper nouns in it that you mightn't want to use. The second grep rejects words with ending in apostrophe s, and the third forces the words to be at least 15 characters long. Show Sample Output
-2cat /usr/share/dict/words | grep -P ^[a-z].* | grep -v "'s$" | grep -Pv ^.\{1,15\}$ | shuf -n4 | tr '\n' ' ' | sed 's/$/\n/' -
The better alternative to #9756. I don't think I'd ever use the original command, but this one was so bad I had to post this. Sorry. 1. $(ls) is dumb, and will give errors if you have an alias like "ls -Fs" 2. clear is better and more portable than reset state. 3. if you're interested in differences, then use diff, not cat.
-2for f in *; do clear; cat $f; sleep .3; done -
Original submitted version would break if any filenames had whitespaces in them. The command is a Bad Idea anyhow, because you will end up `cat`ing a binary or something else specacularly bad.
-2for file in ./*; do cat "$file"; sleep 0.3 -
-2wget -q ip.nu && cat index.html
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Write script or commands in notepad/Editplus/MS word etc, copy the contents, type the above command and click on enter now, paste by right click-ing the mouse. Entire contents in the clip-board gets pasted now again click on Enter to go to new line/next line. Press Ctrl+D to close/save the file. Not always required to vi to create a new file.
-2cat > file_name -
-2cat urls.txt | xargs -n1 curl -O --max-time 10 --retry 3 --retry-delay 1
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echo "ls" > script.bash; This is my script, a simple 'ls'. gpg -c script.bash; Here I encrypt and passord-protect my script. This creates file script.bash.gpg. cat script.bash.gpg | gpg -d --no-mdc-warning | bash Here I open file script.bash.gpg, decrypt it and execute it.
-2echo "ls" > script.bash; gpg -c script.bash; cat script.bash.gpg | gpg -d --no-mdc-warning | bash -
-2cat /etc/shadow
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-2cat user_public_key.pub | ssh root@<host> "cat | su -c 'mkdir -m 700 -p ~/.ssh && cat >> ~/.ssh/authorized_keys && chmod 600 ~/.ssh/authorized_keys' <user>"
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Broken in two parts, first get the number of cores with cat /proc/cpuinfo |grep proc|wc -l and create a integer sequence with that number (xargs seq), then have GNU parallel loop that many times over the given command. Cheers! Show Sample Output
-2time cat /proc/cpuinfo |grep proc|wc -l|xargs seq|parallel -N 0 echo "scale=4000\; a\(1\)\*4" '|' bc -l -
Change :alnum: to :graph: for all printable characters Show Sample Output
-2cat /dev/urandom |tr -c -d '[:alnum:]'|head -c 16;echo -
Show message in file "welcome" to all logged in terminal users. Show Sample Output
-3cat welcome | wall -
-3cat file1.txt | uniq > file2.txt
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^V means CTRL-V [ENTER] means ENTER key
-3cat [ENTER]^V^O[ENTER]^D -
Displays SuSE release information Show Sample Output
-3cat /etc/SuSE-release -
-3cat /proc/cpuinfo
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-3TIMEUNIT=$( cat a | grep -n "timescale" | awk -F ":" '{ print $1 } ' )
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bash neto..
-3exec 3<>/dev/tcp/whatismyip.com/80; echo -e "GET /automation/n09230945.asp HTTP/1.0\r\nHost: whatismyip.com\r\n" >&3; a=( $(cat <&3) ); echo ${a[${#a[*]}-1]}; -
I think I picked this one up from Hak5 (yeah I know.. kinda lame)
-3#Client# cat "The Meters - People Say.mp3" | nc -vv 192.168.1.100 8080; #Server# nc -vv -l -s 192.168.1.100 -p 8080 | mpg123 -v - -
-3cat /proc/acpi/battery/*/state
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Replaces tabs in output with spaces. Uses perl since sed seems to work differently across platforms.
-3cat file_with_tabs.txt | perl -pe 's/\t/ /g' -
-3cat aaaaaa 2>&-
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