Jan Kończak

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|~~#~~|mkdir foo \\ mkdir foo/baz \\ … |
|:::| mkdir -p foo/baz/bar foo/bar foobaz/bar|
|~~#~~|rmdir foo/baz/bar \\ rmdir foo/baz|
|~~#~~|echo "foo" > file1 \\ ln file1 file2 \\ echo "bar" > file2 \\ cat file1|
|~~#~~|cd \\ ln -s /tmp TMP \\ cd TMP \\ pwd|
|~~#~~|# second column of "ls -l" results|
|:::|ln -s /tmp ~/TMP \\ cd ~/TMP \\ pwd|
|~~#~~|cd \\ ln -s . loop \\ cd loop \\ cd loop \\ pwd|
|~~#~~|ln -s /nonexistent/path brokenSymlink \\ ls -l|
|~~#~~|cp /etc/os-release /etc/SUSE-brand .|
|~~#10~~|cp -a someDir newDir|
|~~#~~|mv newDir someDir|
|~~#~~|mv someDir anotherDir|
|~~#~~|cp -al anotherDir yetAnotherDir \\ echo "modified" > yetAnotherDir/file2 \\ tree -D --timefmt=%H:%M:%S anotherDir yetAnotherDir \\ # fileów anotherDir/file2 i yetAnotherDir/file2|
|~~#~~|cd /tmp \\ touch example \\ scp example student@lab-sec-1:example|
|:::|cd /tmp \\ touch example \\ scp example student@lab-sec-1:|
|~~#~~|scp /tmp/example student@lab-sec-1:/tmp|
|~~#~~|cd /tmp \\ sftp student@lab-sec-1 \\ <color #c0c0c0>sftp></color> cd /tmp \\ <color #c0c0c0>sftp></color> put example |
|:::|sftp student@lab-sec-1 \\ <color #c0c0c0>sftp></color> cd /tmp \\ <color #c0c0c0>sftp></color> put /tmp/example |
|:::|sftp student@lab-sec-1 \\ <color #c0c0c0>sftp></color> cd /tmp \\ <color #c0c0c0>sftp></color> lcd /tmp \\ <color #c0c0c0>sftp></color> put example |
|~~#~~|touch file_{a..z} \\ rm file_? \\ touch file_{a..z} \\ rm -f file_? \\ … |
|~~#~~|rm file_? \\ rm -f file_?|
|~~#~~|mkdir someDir \\ rm -r someDir|
|~~#~~|sleep 2|
|~~#~~|time sleep 2|
|~~#~~|time openssl dhparam -text 1536|
|~~#~~|timeout 5s openssl dhparam -text 2048|
|~~#~~|ps|
|~~#~~|ps -l|
| ::: |ps -f|
| ::: |ps -F|
| ::: |ps u|
|~~#~~|ps -e|
| ::: |ps ax|
|~~#~~|ps -T \\ # a process with two threads is displayed as two lines with same pid (and different tids)|
| ::: |ps -L|
|~~#~~|pstree|
| ::: |ps -eH|
|~~#~~|pstree -p|
| ::: |ps -eH|
|~~#~~|cat /proc/self/status \\ # the status is shown for the cat process|
|~~#32~~|top \\ # 'P' / 'M' sort by CPU / memory, besides '<' and '>' select sort columns|
|~~#~~|# Running, Sleeping, D → stalled on I/O (disk access), t → paused while debugging, Zombie|
|~~#~~|htop \\ # '<' and '>' opens a sort menu \\ # or: mouse click on column name|
|~~#~~|htop \\ # 'F5' and 't' toggle tree view \\ # 'F3' and '/' search, once search term is set, 'F3' jumps to ext occurrence|
|~~#~~|sleep 1h \\ pgrep sleep|
| ::: |sleep 1h \\ pidof sleep|
| ::: |sleep 1h \\ pgrep -f 'sleep 1h'|
|~~#~~|sleep 1337h \\ sleep 42h \\ pgrep -f '1337h'|
|~~#~~|pgrep 'gdm$'|
| ::: |pidof gdm|
|~~#~~|sleep 1h \\ pgrep sleep \\ # or e.g., ps -e , pstree -p , htop … \\ kill //pid// |
|~~#~~|sleep 1h \\ pkill sleep|
|~~#~~|# select "run…" from the panel, input "mousepad" \\ pkill -STOP mousepad \\ # notice that mousepad froze \\ pkill -CONT mousepad \\ # mousepad is now responsive|
|~~#~~|named -g -c <(:) \\ pkill -HUP named \\ # named states that it reloaded all configuration and zone files|
|~~#~~|nice -n 10 sleep 1h \\ ps -el \\ # or htop |
|~~#~~|sleep 1h \\ pgrep sleep \\ renice 15 //pid// |
|~~#~~|taskset -pc 0 $$ \\ openssl dhparam -text %%$((2**14))%% \\ # ×2 \\ htop \\ # limit results to openssl by 'F4' or '\' \\ # 'F8' increases niceness|
| ::: |taskset -pc 0 $$ \\ openssl dhparam -text %%$((2**14))%% foobazbar \\ # ×2 \\ htop \\ # search for openssl with 'F3' or '/' \\ pgrep -f foobazbar \\ renice -n 1 //pid// \\ renice -n 2 //pid// \\ ... |


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Jan Kończak

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