Cheatography
https://cheatography.com
Various UNIX shell commands for programming, env and system management. Those commends are helpful, to me, but not often used. I had made this sheet to avoid periodically searching another time for the same thing.
ssh
sshfs [USER@HOST]:[remote_directory] mountpoint [options]
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mount remote drive in mountpoint |
ssh -o ServerAliveInterval=X -o ServerAliveCountMax=Y [HOST]
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Maintaing ssh conection for X seconds and Y tries |
ssh-copy-id -i ~/.ssh/id_rsa [USER@HOST]
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add autentication via ssh, not .pub file |
autossh -N -f -L localhost:[PORTU]:localhost:[PORTR] [USER@HOST]
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map local port PORTU to PORTR on USER@HOST with autoreconnect |
operations on files & drives
cp -r $(<file_listed.txt) outdir
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copies files & directories listed in file_listed.txt to outdir |
xargs -a file_listed.txt cp -r -t outdir
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same as above |
tar -(v)czf file.tar.gz /path/to_compres
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create -cf archive -xf for extract |
unzip file.zip -d file
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unzip file.zip to file directory (must exists before) |
mkdir -p dir
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make parent directories as needed, no error |
rm -r !(*.ext)
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delete everything except files with extension .ext |
du -hs dir
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check size of dir use -h for GB or -m for MB |
basename path/basename.ext .ext
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get basename from path without ext |
grep -i -r -E 'pattern1|pattern2|pattern3'
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multiple patterns with grep -i case insensitive -r recursive |
find -(i)name "pattern" -type d/f
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list f files or d directories with matching pattern |
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Statements
while read line; do [Command] done < input.file
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Loop over file content |
for file in ./*.extention; do [Command] done
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loop over files in directory |
if test -f file.txt; then [Command] fi
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check if file exists -f , -d for directory |
if [-f file.txt]; then [Command] fi
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same different syntax |
if [ -z "$S1" ]; then fi
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checks if arg $1 is empty |
function function_name { <commands> }
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function declaration, $1 $2 - argument names |
"$?"
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return exit status from last command |
$(expr)
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evaluate expr and store/print it's result |
system
cat /proc/cpuinfo #or lscpu
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cpu informations |
uname -a
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OS informations |
ss -tpln
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show forwarded ports |
lsblk -S
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list block devices -S for minimal view |
dd if=/path/to/image.iso of=/drive/location bs=4M && sync
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create bootable drive from image.iso |
sudo mount [drive] [mountpoint]
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mounts drive at mountpoint |
kill -9 $(pgrep -f [pattern])
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terminate all processes matching pattern |
printenv
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print all env variables |
git
git rm -r --cached <path/file.ext>
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remove untracked files |
git clean -d -(n/f)
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remove undone changes add: -n to show files to remove or -f to remove them |
git fetch --all [branch_name]
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copies all changes from last pull/clone on current branch or given branch name |
git log --not --remotes
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all commits on all branches that aren't pushed yet |
git checkout -b <new_branch>
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change & create new branch |
git switch -c <new_branch>
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same as above |
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