All commands (13,906)
-
0parallel -j200% -n1 -a textfile-with-hosts.txt nc -vz {} ::: 22
-
0xargs -i -P 1200 nc -zvn {} 22 < textfile-with-hosts.txt
-
include in the list human readable hidden files too:
file .* *|grep 'ASCII text'|sort -rk2more reliable command:ls|xargs file|grep 'ASCII text'|sort -rk2and include hidden files:ls -a|xargs file|grep 'ASCII text'|sort -rk20file *|grep 'ASCII text'|sort -rk2 -
GNU grep's PCRE(Perl-compatible regular expressions).
0grep -Po '^(.*?:\K)?.*' -
Delete the beginning of each line until first match of given character, in this case it's ":" Does it on all lines. The given character is deleted also, and can be a space.
0sed 's/^[^:]*://g' -
0convmv --lower --notest FILE
-
1sysctl machdep.xcpm.cpu_thermal_level
-
2ssh -J user@reachable_host user@unreacheable_host
-
It finds, specifically, the connections to the HTTP and HTTPS ports as source ports. You can check for destination ports as well. Show Sample Output
2ss -o state established '( dport = :http or sport = :https )' -
1 = on ac, 0 = on bat
1cat /sys/class/power_supply/AC/online -
Just an alternative for `acpi -b` Show Sample Output
0eval "$(printf "echo %s \$((%i * 100 / %i))\n" $(cat $(find /sys -name energy_now 2>/dev/null | head -1 | xargs dirname)/{status,energy_{now,full}}))%" -
Bash's here string
5sudo -s <<< 'apt update -y && apt upgrade -y' -
Number of days back: change/append arbitrary amount of '\|'$[$(date +%Y%j)-x] expressions or specify any n-th day before today for a single day (you have to replace x with 3, 4, 5, whatever ... above I replaced it with 1 and 2 to get listing for yesterday and day before yesterday and 0 for today was not necessary, so left out). Q: How to narrow to *.pdf , *.png, *.jpg, *.txt, *.doc, *.sh or any type of files only? A: Pipe to grep at the end of command. Even shorter:
cd && day=3;for a in $(seq $day -1 0);do tree -aicfnF --timefmt %Y%j-%d-%b-%y|grep $[$(date +%Y%j)-$a];doneHere it's only needed to change amount of variable day to list period of days back - here is set to three days back (the seq command is adjusted for listing the oldest stuff first). Show Sample Output-1cd && tree -aicfnF --timefmt %Y%j-%d-%b-%y|grep $(date +%Y%j)'\|'$[$(date +%Y%j)-1]'\|'$[$(date +%Y%j)-2] -
If you try to access cd - you go to the last folder you were in.
1cd -- - -
Remove lines from a bibtex file that have abstracts in them.
0sed '/^\s*abstract\s*=\s*{[^\n]*},$/ d' input.bib > output.bib -
This will also work with bash instead of sh shell sudo bash -c 'apt update -y && apt upgrade -y'
0sudo sh -c 'apt update -y && apt upgrade -y' -
"seq" has an additional parameter to use as INCREMENT. # seq FIRST INCREMENT LAST https://linux.die.net/man/1/seq Show Sample Output
0for i in $(seq 1 5) ; do echo $i ; done -
1seq 10 20
-
Add this to a script and you can do ./scriptname site help or ./scriptname mput etc etc.
0all="$(echo -e $*|awk '{for(i=3;i<=NF;++i)print $i}'|xargs)"; lftp -e open <HOSTNAME> -p <PORT> -u <USER>:<PASSWORD> -e "$all;exit" -
Was to long with a loop, use a while loop for have it running 24/7
0inotifywait -r -q --format %w /var/log/auth.log|grep -i "Failed pass"|tail -n 1|grep -oE '\b([0-9]{1,3}\.){3}[0-9]{1,3}';iptables -I INPUT -i eth0 -s "$(cat /var/log/auth.log|grep "authentication failure; l"|awk -Frhost= '{print $2}'|tail -n 1)" -j DROP -
For ipv6 use: grep -oE "\b([0-9A-Fa-f]{1,4}:){7}[0-9A-Fa-f]{1,4}\b"
0for idiots in "$(cat /var/log/auth.log|grep invalid| grep -oE '\b([0-9]{1,3}\.){3}[0-9]{1,3}\b')"; do iptables -A INPUT -s "$idiots" -j DROP; done -
Bash's arithmetic evaluation.
2for((i=1;i<=10;i++)){ echo $i; } -
2for i in {1..10}; do echo $i; done
-
0netstat -nap|grep 80|grep LISTEN
-
0rangeBegin=10; rangeEnd=20; for ((numbers=rangeBegin; numbers<=rangeEnd; numbers++)); do echo $numbers; done
- 1 2 3 > Last ›
What's this?
commandlinefu.com is the place to record those command-line gems that you return to again and again. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.
Check These Out
Stay in the loop…
- Follow the Tweets.
-
Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.
» http://twitter.com/commandlinefu
» http://twitter.com/commandlinefu3
» http://twitter.com/commandlinefu10 - Subscribe to the feeds.
-
Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):
Subscribe to the feed for:
- » all commands
- » commands with 3 up-votes (commandlinefu3)
- » commands with 10 up-votes (commandlinefu10)
