All commands (14,043)
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Python is installed on many boxes (in case you could not afford installing jq).
0curl -s "https://api.github.com/users/<username>/repos?per_page=1000" | python <(echo "import json,sys;v=json.load(sys.stdin);for i in v:; print(i['git_url']);" | tr ';' '\n') -
in case you could afford installing jq
1curl -s "https://api.github.com/users/<username>/repos?per_page=1000" | jq '.[].git_url' -
Using the csv tool `miller` you can transform a csv file into a json array of objects, where the properties are the values of the csv header line and the values are the values of the subsequent lines. Show Sample Output
2mlr --c2j --jlistwrap cat file.csv -
http://alvinalexander.com/linux/unix-linux-process-memory-sort-ps-command-cpu for an overview of --sort available values
5watch -n1 "ps aux --sort=-%mem,-%cpu | head -n 50" -
Use flag "--" to stop switch parsing Show Sample Output
1grep -- - -
14curl -s https://api.github.com/users/<username>/repos?per_page=1000 |grep git_url |awk '{print $2}'| sed 's/"\(.*\)",/\1/'
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Shell function which takes a bash command as its input, and displays the following formatted output: EXAMPLE: command OUTPUT: output from command Show Sample Output
8example() { echo "EXAMPLE:"; echo; echo " [email protected]"; echo; echo "OUTPUT:"; echo ; eval "[email protected]" | sed 's/^/ /'; } -
Measure the cpu performance: In-case if the cpu is thermal throttling then you can find it using this command. Check the first line of the output. Example: Doing md5 for 3s on 16 size blocks: 11406892 md5's in 2.98s ? #(When cpu is not throttling) Doing md5 for 3s on 16 size blocks: 110692 md5's in 2.98s ?? #(When cpu is thermal throttling) Practical use case: Once we had cooling outage in data center which caused thermal throttling in some of the worker nodes. We used this tool to prove that some servers are not performing well because of the cpu thermal throttling. Show Sample Output
10openssl speed md5 -
Click window to change its opacity. Source: https://unix.stackexchange.com/a/494289
1xprop -format _NET_WM_WINDOW_OPACITY 32c -set _NET_WM_WINDOW_OPACITY 0x7FFFFFFF -
This command first determines whether a second screen is connected. If this is the case, it sets the screen's RGB gamma via xrandr. Useful for cheap or slightly defective monitors with a tint. In this example a yellowing/champagne color deviation is compensated for by decreasing the red and the green portion of the image.
1secondscreen=$(xrandr -q | grep " connected" | sed -n '2 p' | cut -f 1 -d ' '); [ "$secondscreen" ] && xrandr --output $secondscreen --gamma 0.6:0.75:1 -
Change the file extension in batch. Useful to create output file names with same input name but distinct extension by including logic inside the loop
3for file in *.txt; do mv "$file" "${file%.txt}.xml"; done -
5find /glftpd/site/archive -type f|grep '([0-9]\{1,9\})\.[^.]\+$'|parallel -n1 -j200% md5sum ::: |awk 'x[$1]++ { print $2 " :::"}'|sed 's/^/Dupe: /g'|sed 's,Dupe,\x1B[31m&\x1B[0m,'
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I find the other timers are inaccurate. It takes some microseconds to perform the date function. Therefore, using date/time math to calculate the time for us results in millisecond accuracy. This is tailored to the BusyBox date function. May need to change things around for GNU date function. Show Sample Output
-1let T=$(date +%s)+3*60;while [ $(date +%s) -le $T ]; do let i=$T-$(date +%s); echo -ne "\r$(date -d"0:0:$i" +%H:%M:%S)"; sleep 0.3; done -
Top 10 Memory Processes (reduced output to applications and %usage only) Show Sample Output
2ps aux | sort -rk 4,4 | head -n 10 | awk '{print $4,$11}' -
You will see it on the corner of your running terminal. Show Sample Output
6while sleep 1; do tput sc; tput cup 0 $(($(tput cols)-29)); date; tput rc; done & -
Hides all Files and Folders on the MacOS Desktop. To show files and folders, type "true" instead of "false". "Finder" at the end is case sensitive, "finder" doesn’t work
2defaults write com.apple.finder CreateDesktop -bool false;killall Finder -
2for i in *; do sum=$(md5sum $i); mv -- "$i" "${sum%% *}"; done
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Works for repos cloned via ssh or https. Show Sample Output
1git remote -v | sed -n '/github.com.*push/{s/^[^[:space:]]\+[[:space:]]\+//;s|[email protected]:|https://github.com/|;s/\.git.*//;p}' -
GNU grep's perl-compatible regular expression(PCRE).
1binaries () { dpkg -L "$1" | grep -Po '.*/bin/\K.*'; } -
This shell function displays a list of binaries contained in an installed package; works on Debian based Linux distributions. Show Sample Output
1binaries () { for f in $(dpkg -L "$1" | grep "/bin/"); do basename "$f"; done; } -
With this command you can convert a tab separate file (TSV) into a JSON file with jq. For example, this input.tsv i-0b9adca882e5e6326 172.16.0.188 i-088dd69e5c3624888 172.16.0.102 i-0e70eac180537d4aa 172.16.0.85 will produce the showed output. Show Sample Output
2cat input.tsv | jq --raw-input --slurp 'split("\n") | map(split("\t")) | .[0:-1] | map( { "id": .[0], "ip": .[1] } )' -
It displays the top 10 processes sorted by memory usage Show Sample Output
3ps aux | sort -rk 4,4 | head -n 10 -
Copy this function to command line, press 'Enter' 'f'' 'Enter' to execute (sentence on the left written only for newbies). Hint 'e|x|v|1..9' in front of displayed last modified file name means: "Press 'e' for edit,'x' for execute,'v' for view or a digit-key '1..9' to touch one file from the recent files list to be last modified" and suggested (hidden files are listed too, else remove 'a' from 'ls -tarp' statement if not intended). If you find this function useful you can then rename it if needed and append or include into your ~/.bashrc config script. With the command
. ~/.bashrcthe function then can be made immediately available. In the body of the function modifications can be made, i.e. replaced joe editor command or added new option into case statement, for example 'o) exo-open $h;;' command for opening file with default application - or something else (here could not be added since the function would exceed 255 chars). To cancel execution of function started is no need to press Ctrl-C - if the mind changed and want to leave simple Enter-press is enough. Once defined, this function can withtypeset -f fcommand be displayed in easy readable form Show Sample Output2f() { ls -lart;e="ls -tarp|grep -v /|tail -9";j=${e/9/1};g=${e/9/9|nl -nln};h=$(eval $j);eval $g;read -p "e|x|v|1..9 $(eval $j)?" -n 1 -r;case $REPLY in e) joe $h;;v)cat $h;;x) eval $h;;[1-9]) s=$(eval $g|egrep ^$REPLY) && touch "${s:7}" && f;;esac ; } -
The command finds every item within the directory and edits the output so that subdirectories are and files are output much like the tree command Show Sample Output
3find . -print | sed -e 's;[^/]*/;|-- ;g;s;-- |; |;g' -
-2$ sudo systemctl restart bluetooth
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