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Obsessed with doing things in the shell, I've decided to share my daily struggles on living in the shell as terse but informative posts.
chmod 🔐 Modifies file/directory permissions (See here or here for more details). Permission expressions are mostly formatted as [ugoa][+-=][rwx]: SymbolMeaning rRead wWrite xExecute SymbolMeaning uUser (owner of the file/directory)...
cut ✂️ Cuts/extracts text/fields out of text streams. ⚠️ Index values are one-based. Cut characters on a range -c echo "Hello World\!\nGoodbye\!" | cut -c2-5 Takes characters at indices 2 through 5. ello oodb Cut characters on a half-limited rang...
md5sum/shasum #️⃣ Checks/computes MD5/SHA checksum of files. Compute MD5 checksum md5sum md5sum ~/.bashrc ~/.zshrc ~/.profile fc4231f666b25990eefc1c51917d7bb1 /home/babak/.bashrc 6688207953bbd9d20d487a9509a6c297 /home/babak/.zshrc 43f7dc02e7bfb5d...
head 📜 Displays file content from beginning. Print first N lines of a file -n head -n 5 ~/.bashrc Print all but N last lines -n -N tail -n -3 ~/.bashrc Print first N bytes of a file -c head -c 1k ~/.bashrc Prints first 1k of file binary content....
tail ⛵ Display or follow file content. ℹ️ Here, following means streaming a file while it's being updated (appended). ℹ️ You can use -c in place of -n in the following examples, to switch to binary offset selection. Print bottom N lines of a file -n ...
df 💾 Reports disk free space. See disk free space df Filesystem 1K-blocks Used Available Use% Mounted on tmpfs 1603540 2068 1601472 1% /run /dev/nvme0n1p3 471738592 268747932 178957944 61% / tmpfs 8017688 ...
