Change permission on just files
find . -type f -exec chmod -x {} \;
Using bash IF and checking exit codes
PARSE=$(date -d "$DATE")
if [ $? != 0 ]; then
echo "Failed to parse " $DATE
fi;
Turn on pattern search for zsh history
bindkey "^R" history-incremental-pattern-search-backward
bindkey "^S" history-incremental-pattern-search-forward
Enables wildcard matches like *
and ?
.
Example
% history
…
46 ls
47 ssh isaacsu.com
48 echo "hello world"
49 ssh notes.isaac.su
<^R>
% ssh notes.isaac.su
bck-i-search: ss?_
<^R>
% ssh isaacsu.com
bck-i-search: ss*com_
Turn on NAT in linux using iptables
/sbin/iptables -A FORWARD -i tun0 -o wlan5 -m state --state RELATED,ESTABLISHED -j ACCEPT
Unzip files in lots of nested directories
for FILE in $(find . -type file); do \
gunzip $FILE; \
done;
Cut a text file delimited by ":"
Given file.txt
:
alice:female:melbourne
bob:male:sydney
cut -d':' -f1 file.txt
alice
bob
cut -d':' -f2 file.txt
female
male
Delete too many files
for FILE in $(ls too_many*); do rm $FILE; done;
Delete all Exited Docker Containers
docker container ls -a | grep -v "^CONTAINER ID" | awk '{print $1}' | xargs docker rm -f
Move a series of files
IMG_10040.jpg
IMG_10041.jpg
IMG_10042.jpg
IMG_10043.jpg
IMG_10044.jpg
IMG_10045.jpg
mv IMG_100{40..45}.jpg ../dest
Check free disk space on MacOS without app container excluding nullfs
df -h -T nonullfs