truncate

truncate (coreutils package)

• Set file to zero:
  • truncate -s 0 /path/to/filename
  • truncate -s 0 /var/lib/docker/containers/*/*-json.log

Alternative: echo "" > filename

• truncate -s 500MB /swap.img

Related commands

• virt-resize
• touch
• split
• rm
• echo
• logrotate
• fallocate
• tr

See also

• cat, tac, more, less, tail, mtail, echo, stdin, tr, column, paste, truncate, logrotate, xzcat pv, progress, sort, ncat, virt-cat, awk, join, col, fold, tee, sponge, nfs-cat, journalctl, ccat, icat, EOF, lolcat
• file, File system, directory, touch, mkdir, ls, ln truncate, fallocate, split, stat, inode, File descriptor, superblock, block size (blockdev), fuser, lsof, scrub, chattr, ulimit (nofiles), cp, mv, file (command), mkfifo, chmod