Bash keeps your history in two places, and the list that the history command prints is not the file the next shell reads. I ran history -c on a test session and printed the file straight afterwards, and every line was still in it. Clearing bash history means handling both stores, and the file is
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Running a Linux command from Python takes one call, and the one you pick decides whether the output lands in a variable. os.system is the short version, and the number it returns is not the exit code you expect. subprocess.run runs the same command and hands back the text, the error text, and the plain
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Disk partitioning tools on Linux all edit the same structure, a table that records which sectors belong to which partition. The trouble usually sits one layer below, where a partition entry and the filesystem inside it hold separate sizes. What those tools will do for you comes down to two rules. Unallocated space has to
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cat prints a file to your screen and stops there. The name is short for concatenate, because joining files is the job it was written for and reading a long one was never part of the plan. The cat command in Linux hands every byte of a file to standard output, so a long log
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man opens the manual page for a command from /usr/share/man, right there in the terminal. No network, and no browser tab. man -k found the page I could not name from its one-line description, and man -f listed two pages under the same name. The section number settles which one you get. What man reads,
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A USB drive the kernel has already detected can still have no path to its files. The server offers no file manager and no /media folder. Mounting is what joins a partition to a directory, and the kernel keeps that entry until you detach it. I attached a FAT32 volume as a loop device for
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Installing Android Studio on Linux starts with a 1.5 GB download that unpacks to 3.5 GB before the Android SDK arrives. The dependency list has gone stale. The official page still asks 64-bit Ubuntu users for i386 libraries, while every 32-bit binary inside the archive is a payload for a phone, not for your desktop.
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tar turns a folder into a single file on any Linux system, and the same command compresses it on the way. Understanding the option string is the whole job, because tar -czvf stacks four unrelated jobs into one word. What the letters in tar -czvf are doing Read the string as four jobs rather than
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A for loop that renames files can act on half a filename, because bash splits the word list on whitespace before the body runs. A file holding the names report final.txt and notes.txt reaches the loop as three words, so the command in the body runs against a path that does not exist. Quoting inside
Bash for Loop in Shell Scripts: Syntax and Split Filenames Read More »
A dual boot keeps Ubuntu in three places, and the partition is only one of them. The root filesystem sits on its own partition, the bootloader sits on the EFI system partition, and the firmware keeps a pointer to that bootloader in its own boot list. Delete the partition on its own and the machine
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